Epi Update Weekly Publication of the Bureau of Epidemiology

November 18, 2005

Epi Update Managing Staff:

M. Rony François, MD, MSPH, PhD, Secretary, Florida Department of Health
Russell W. Eggert, MD, MPH, Director, Division of Disease Control
Dian K. Sharma, MS, PhD, Bureau Chief, Bureau of Epidemiology, Editor-in-Chief
Jaime Forth, Managing Editor, Bureau of Epidemiology

"The reason for collecting, analyzing and disseminating information on a disease is to control that disease. Collection and analysis should not be allowed to consume resources if action does not follow."

Foege WH., International Journal of Epidemiology 1976; 5:29-37


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Outbreak of Cryptosporidiosis Among Attendees
of a Statewide T-Ball Tournament, June 2005

by Sharleen Traynor, MPH; Kathleen Ward, RS, MSEH;
Sa'ah Zaheer, MD, MSPH, FACE; Angela Morgan, RN, BSN

All charts and graphs associated with this article are accessible
through the link provided here:Page will open in a new window

Background
On Monday June 27, 2005 the Duval County Health Department (DCHD) Epidemiology Program received a report from a physician’s office of cryptosporidiosis in a 6 year-old male. Two additional cases were reported the following day, among two brothers under the age of six. Case investigation revealed that the three individuals developed symptoms after attending a statewide T-ball tournament in Chiefland, Florida held June 1-5. Anecdotal reports suggested that other tournament attendees including additional teammates, family members, and players on other teams were ill. Initial information indicated that those who became ill stayed at the same hotel in Gainesville, Florida. Hotel A was undergoing renovations during the time the tournament occurred. There were reports that the water supply to the hotel was turned off for several hours at a time. Some guests reported turbid water coming from the hotel faucets. Hotel A also had a swimming pool that remained open during the renovations, and many players swam in the pool several times throughout their stay. The DCHD Epidemiology Program began an outbreak investigation in collaboration with regional environmental epidemiologists, the Alachua County Health Department, and Florida EIS fellows from Duval and Hillsborough counties. 

Preliminary Case Investigation
The tournament coordinator provided a list of all seventeen teams attending the Chiefland T-ball Tournament.
The head coaches or “Team Moms” of each team were contacted and questioned about any illnesses among their team members. An EpiCom message was posted on June 29th to solicit further case findings. Only two of the seventeen teams reported illness. One team was from the Tampa area and the other was from Jacksonville. These were the only teams that stayed at Hotel A in Gainesville during the tournament.  

Environmental Investigation
The Alachua County Health Department’s Environmental Health Division conducted an inspection of the swimming pool at Hotel A on June 29, 2005. The inspection report deemed the swimming facility unsatisfactory due to the absence of daily maintenance logs. More than three weeks had passed since the exposure period, and several chlorination treatments and frequent filtering of the pool had occurred. Given the costly and labor-intensive testing process, the pool was not tested for Cryptosporidium oocysts. The Department of Business and Professional Regulation completed a lodging inspection of Hotel A, and there were no reported health code violations. 

Epidemiological Investigation
A case-control study was conducted to determine the source of this outbreak. A case was defined as any attendee or household contact of an attendee of the Chiefland T-ball tournament experiencing three or more watery stools within a 24 hour period and/or at least two of the following symptoms: Anorexia, abdominal cramps, or fatigue, and/or any laboratory confirmed infection with Cryptosporidium between May 18 - June 17, 2005. Controls were selected among non-ill tournament attendees from Jacksonville, Gainesville, and Chiefland. A questionnaire was developed to evaluate possible exposures including water activities, common meals, and common water sources during the tournament. A parent or guardian of each tournament participant was contacted by telephone for interview. One questionnaire was completed for each member of the household.      

Data Analysis
Data were entered into Epi Info 2002 (Centers for Disease Control and Prevention, Atlanta, GA). The database was then exported and analyzed in SAS version 9.1 (The SAS Institute, Cary, NC). Univariate analysis was conducted to evaluate risk factors for infection. 

Results
Of the two teams reporting illness who stayed at Hotel A, 21 of 24 households (87.5%) were interviewed for a total of 80 completed questionnaires. Of the five teams selected as controls, 28 of 60 households (46.67%) were interviewed for a total of 44 completed questionnaires. Out of 124 individuals surveyed, 47 (37.9 %) met the case definition. The mean age among the cases was 20.3 years (range: 1-49 years) compared to the mean age among controls 19.5 years (range: 2-65 years). The age of the respondents reflects the makeup of the families interviewed, with the majority of parents between 30-39 years and their children between 5-9 years of age (Figure 1). Gender was similar among the cases and controls, 66.0% and 68.8% male, respectively (Χ2=0.11, p=0.74).
  

The most common symptoms reported among the cases were diarrhea (95.7%), abdominal pain/cramps (80.9%), nausea (76.6%), and vomiting (72.3%) (Table 1). Dates of symptom onset ranged from May 18th – June 17th and peaked on June 5th with 11 cases. A second peak occurred on June 12th with 6 cases  (Figure 2).  The epidemic curve is consistent with a point source infection followed by secondary infections. The average duration of illness was 10.74 days (range: 1-27 days). 

Of the 47 cases, 15 (31.9%) sought medical attention. Six children were prescribed nitazoxanide as treatment.  None required hospitalization. A total of 12 stool samples, all from the Jacksonville team, were collected for testing. Five samples were positive for Cryptosporidium oocysts, six were negative, and one was lost during the testing process.   

The risk factor analysis included 105 of the 124 individuals interviewed. Two cases and 17 controls were excluded from the analysis because they did not attend the tournament. The risk factor most strongly associated with illness was staying at Hotel A. The statistical analysis showed that those who stayed at Hotel A were over 30 times more likely to develop illness than those who stayed elsewhere (OR=30.10, 95% CI 6.664-135.956). Sharing a team water cooler, having a team meal, or prior water activity were other risk factors that had a statistically significant association with infection. Other exposures including eating at the concession stand or prior travel did not have an association with illness (Table 2). Further analysis was conducted among those individuals who stayed at Hotel A to consider specific water exposures as risk factors. Of the 68 individuals who stayed at Hotel A, there were 43 cases and 25 controls. Those who swam in the pool were 5.57 times more likely to become ill than those who did not swim in the pool (OR=5.57, 95% CI 1.804-17.203). Despite reports of turbid water coming from the faucets at Hotel A, ingestion of hotel water was not analyzed as a risk factor because 100% of cases and controls used hotel water for drinking or brushing teeth. 

Because teammates participated in several common activities before and after the tournament, it is likely that some risk factor associations are due to confounding. Odds ratios adjusted for exposure to these potential confounders are shown in Table 3. Confounding was considered to be present if there was ≥10% difference between crude and adjusted odds ratios. A breakdown of characteristics of swimmers at Hotel A is shown in Table 4. 

The average swim time among cases was greater than that of controls on all three days, but the difference was statistically significant on June 2nd only. The proportion of swimmers who recall swallowing water was similar on June 3rd and 4th, but was significantly greater among the cases on June 2nd. The proportion of swimmers who swam underwater was similar among cases and controls for all three days. Assuming that exposure to Cryptosproidium oocysts occurred on June 2nd, the mean incubation period among swimmers who became ill was 5.68 days (range 2-15 days), which is consistent with cryptosporidiosis infection. 

Discussion
Cryptosporidiosis is a diarrheal disease caused by parasites of the genus Cryptosporidium. Infection occurs by the ingestion of oocysts usually through a contaminated food or water source. Individuals shed oocysts in feces, and transmission occurs through the fecal-oral route. Cryptosporidiosis associated with recreational water exposure is an emerging public health problem. The parasite is surrounded by a protective outer shell that makes it very hardy and enables it to survive in the environment for several days. It is also very resistant to chlorine and other disinfectants1,2. There is a low infective dose for Cryptosporidium, and the intermittent nature of the diarrhea adds to the potential for swimming-associated infection3. In this outbreak, the swimming pool at Hotel A was the likely source of infection.  Transmission may have been facilitated by a high bathing load. There were reports that over 30 people swam in the pool at one time. If several people were shedding oocysts, it could have led to a high inoculum of oocysts per individual. The high bathing load also allowed for the opportunity to infect many people in a short period of time. The source of contamination of the swimming pool remains unknown. Although there were two children who were ill before the tournament (Figure 2) and may have been shedding oocysts during the tournament, this cannot be confirmed. 

Other risk factors that had a statistically significant association with infection were participation in prior water activities, sharing a team meal, and sharing a team water cooler. These associations are a result of confounding and not true associations with infection. The team members associated with this outbreak participated in several events together, and confounded the relationship between exposure to the swimming pool and infection. Many children involved in this outbreak had multiple prior water exposures at multiple locations, but no common source was implicated. Similarly, although there were team meals and shared water coolers, there were no meals or water sources in common between the two ill teams. No specific restaurants or food items were implicated as possible sources of infection.  

There were several limitations to this study. First, the investigation did not begin until three weeks after the tournament was held. Many of the cases had already recovered when they were contacted for interview. This was a barrier to obtaining positive stool samples for confirmatory testing. It also led to recall bias. It was difficult for interviewees to provide an accurate food and exposure history. The time lapse also limited the environmental investigation by decreasing the possibility of finding Cryptosporidium oocysts in the pool or water supply at the hotel. Another drawback of this study was that other guests of Hotel A who were not associated with either T-ball team were not contacted. A guest list was provided by the hotel, but there was no contact information available for follow-up. Interviewing other guests at the hotel would have provided a more accurate assessment of exposures.  Selection bias was another limitation of this study. Cases were more likely to complete interviews than controls. In addition, controls that did participate may differ in some way from those who did not. This makes the control group for this study less representative of all eligible members of the control population. Finally, the selection of controls was inconsistent. The intent was to interview all players and family members of each team, similar to the way cases were interviewed. It was difficult to carry out this selection because so many controls were unwilling to participate. As a result, only a group of team members were interviewed rather than the entire team. 

Recommendations
This study yielded several public health recommendations. Hotel A was instructed to keep daily maintenance logs of the swimming facilities. In addition, the pool should be checked daily for proper chlorine levels and filtration. Families concerned with disinfecting their private swimming pools should consult the Centers for Disease Control and Prevention’s Healthy Swimming Guide for the appropriate hyperchlorination procedures4

Effective prevention strategies will also require education of swimmers.  Parents should be educated about the transmission of cryptosporidiosis and encouraged to practice strict family hygiene, especially among diaper-aged children. Individuals with diarrhea should refrain from recreational water activities until at least two symptom-free weeks have passed. This is especially important because of the intermittent diarrhea common with Cryptosporidium infection.  

Conclusion
The symptoms, onset, and duration of illnesses associated with this outbreak are consistent with Cryptosporidium infection. The illnesses were clinically similar, and the epidemic curve indicates a common source exposure. The epidemiological investigation strongly suggests that the individuals affected in this outbreak were exposed to Cryptosporidium oocysts in the swimming pool at Hotel A in Gainesville. The organism was able to survive in the pool because of its resistance to chlorine and filtration. The source of contamination that led to transmission in the pool is unknown.  Education about the importance of refraining from recreational water activities while symptomatic is key in preventing future outbreaks. 

References
1  Heymann DL, ed. Control of Communicable Diseases Manual. 18th ed. Washington DC: American Public Health Association, 2004.
2  Castor, ML and Beach, MC.  Reducing illness transmission from disinfected recreational water venues: swimming, diarrhea and the emergence of a new public health concern. Ped Infect Dis J.  2004;23(9):866-870.
3  DuPont HL, Chappell CL, Sterling CR, et al.  The infectivity of Cryptosporidium parvum in healthy volunteers. N Engl J Med 1995;332(13):855-859.
4  Centers for Disease Control and Prevention Healthy Swimming.
http://www.cdc.gov/healthyswimmingPage will open in a new window

Sharleen Traynor is an EIS fellow assigned to the Duval County Health Department in Jacksonville. Kathleen Ward is a biological scientist at the Jacksonville HSE. Dr. Zaheer is the natural sciences manager of the Department of Epidemiology at the Duval CHD and Angela Morgan is the senior community health nurse for epidemiology at the Duval CHD. They can be reached by phone at 904.791.1688.


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APIC Bay Area Chapter 55 Holds Annual Conference
by Melanie Black, MSW

The Bay Area Professionals in Infection Control (BAPIC) will be holding their annual conference on January 27, 2006 at the Clarion Hotel Tampa Westshore. This year's program, "Old Problems-New Solution" will address topics such as Clostridium difficile, the National Safety Health Network, Infection Control Risk Assessment, zoonotic infections including Avian flu, and hepatitis issues including health care associated outbreaks. The speakers will include national and state leaders in their fields.  

This one-day conference will be offering 7.2 contact hours provided by St. Joseph-Baptist Healthcare for nursing and laboratorians. Registration is $70.00 for members and $100.00 for non-members. Hotel reservations must be made by December 26, 2005 to receive the conference rate of $109 a night at the Clarion Hotel, located at 5303 West Kennedy Boulevard in Tampa, Florida. Free parking and free airport courtesy shuttle are also available. 

For further information about this program, please contact Diana Doughty at St. Joseph's Hospital at 813. 870.4306.

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Bureau of Epidemiology Grand Rounds Program
Rescheduled Due to Hurricane Wilma
by Melanie Black, MSW


Due to hurricane Wilma, the Bureau of Epidemiology monthly Grand Rounds program to have been held on October 25, 2005 has been rescheduled to Tuesday, November 29, 2005 11:00 a.m. -12:00 p.m., EST. Carina Blackmore, MS Vet. Med., PhD, DVM, acting state public health veterinarian, Florida Department of Health will be presenting on Rabies Prevention and Control in Florida. Dr. Blackmore will discuss risk factors for rabies transmission to humans, the steps of a rabies exposure risk assessment and available intervention strategies including post exposure rabies prophylaxis and the vaccination regimen for pre and post exposure rabies prophylaxis. One hour of continuing education units will be offered for this program to nursing, environmental health professionals and laboratorians. 

The Tuesday, December 27, 2005 program will feature Joann Schulte, DO, MPH, Medical Epidemiologist, CDC assignee to the Bureau of Epidemiology, Florida Department of Health; and Phyllis Yambor, RN, Bureau of Immunizations, Florida Department of Health presenting on Meningococcal Vaccine Safety: Issues in Surveillance and Epidemiology. This presentation will discuss the role of epidemiology in monitoring adverse reactions associated with vaccines and the role of the VAERS system, describe the current investigation of possible adverse events related to the newly licensed conjugate meningococcal vaccines and review recent trends in the meningococcal disease in the US and Florida. One hour of continuing education units will be provided to nursing and laboratorians. 

For further information about this program please contact Melanie Black, MSW, professional training coordinator at 850.245.4444, ext. 2448.

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Picture of a virus

 

Pandemic Pandemonium Workshops
Staged in North Florida

by Jack Pittman

No one knows if the current avian influenza will mutate into a form that can be readily transmitted among humans and if there will be little to no immunity. But to prepare our 13 mostly rural counties for that possibility, the North Florida Region Domestic Security Task Force is hosting Pandemic Influenza Workshops to be held in each county. The county health departments and county emergency management share responsibility for inviting county and community leaders. The invitees include responders and hospitals, business leaders, social organizations, local health care agencies, and faith-based groups. Two counties, Lafayette and Suwannee, have already hosted workshops. The remaining counties will be completed by December 17. 

The workshop consists of two parts. Part I consists of a presentation on the characteristics of influenza virus, how it is transmitted, lessons from the three 20th Century pandemics -- particularly the deadly 1918 virus -- ways to mitigate influenza virus transmission, and community planning for a pandemic. Three live demonstrations are presented by members of the North Florida Domestic Task Force team: Virus particle transmission using glow-germs and ultraviolet light, proper hand-washing technique, and the proper fit of an N-95 mask. As in the Oprah Winfrey Show, each participants leaves with "prizes" that include a package of tissues, a bar of soap, and an N-95 mask, designed to screen out bacteria and viral particles.   

Part II of the workshop is an interactive desktop exercise that incorporates all of the planning issues covered in Part I. The tabletop exercise is presented by the Florida Public Affairs Center of Florida State University who so ably assisted with the popular Beleaguered Bus Exercises. This exercise leads participants through the four phases of an emergency: preparedness, response, recovery and mitigation. During each phase, the participants are asked a series of questions involving potential scenarios using a short timeframe, and their responses, recorded on laptops linked to a wireless server, form the basis for the development of a community pandemic influenza action plan. The leader of each organization is presented a CD ROM with the action plan that they crafted during the exercise. 

It is our hope that we won't see a pandemic develop but even if it does not, we firmly hope these workshops will make community leaders more knowledgeable and better prepared to reduce their local contribution to the 36,000 people who die each year in the US from influenza. 

Jack Pittman is the health and medical co-chair for Region 2 in Florida. He's also the health preparedness director at the Leon County Health Department. To reach him by phone, call 850.487.3146, ext. 132.

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A Multi-state Hepatitis A Outbreak Associated With
Raw Oyster Consumption: A Summary of The
Florida Cases, 2005
 by Janet Wamnes, MS and Roberta Hammond, PhD

Introduction
On September 8, 2005, an Epi-X posting was made by the Alabama Department of Public Health regarding 8 cases of hepatitis A reported on September 3-8. Of the six affected persons interviewed, five reported consuming raw oysters during the 2-4 week period prior to onset of illness.  This report produced a heightened awareness by health officials to determine whether any cases of hepatitis A had consumed raw oysters during the 14-42 days before onset of illness, including Florida. On September 2, two cases of hepatitis A were reported by the Indian River County Health Department and an investigation began immediately. 

Investigation
By September 13, four cases of hepatitis A had been reported to the Florida Department of Health (FDOH). Florida posted an EpiX alert about these cases on September 13. The Centers for Disease Control and Prevention (CDC) also posted an Epi-X alert on September 14, calling for any similar cases of hepatitis A in other states.  Additional reports of hepatitis A cases were reported from various counties in Florida that were associated with consuming raw oysters in four different restaurants (see Table 1). The case definition was defined as a person diagnosed with hepatitis A who had consumed raw oysters 14-42 days before onset of symptoms or a person diagnosed with hepatitis A that was a contact of a diagnosed case who had consumed raw oysters. As part of the investigation, the FDOH, the Department of Business and Professional Regulation, and the Department of Agriculture and Consumer Services Molluscan Shellfish Program, and the Food and Drug Administration (FDA) Seafood safety specialists teamed together to determine the source of the outbreak. Oyster tags were collected from the four different restaurants during the exposure period of infection. The CDC Division of Viral Hepatitis coordinated the two states and the FDA on the investigation. 

At the request of the CDC, serum samples were collected from Florida hepatitis A cases and sent to the CDC for hepatitis A viral sequencing. The CDC also provided a questionnaire for the cases to be conducted by the various county health departments involved. 

Results
There was a total of 20 hepatitis A cases reported in Florida, 15 associated with eating raw oysters, and 5 secondary cases. Of the nine serum samples collected, all matched the DNA sequencing. The matching Florida cases also matched the Alabama, South Carolina, and Tennessee cases. 

The oyster tags collected from the four restaurants showed that the oysters that were likely consumed came from the same harvesting area in Louisiana. Further investigation of the Alabama cases also showed the oysters that were consumed there were also from the same harvesting area. Public notification was not made due to the fact that it was too late for prophylaxis and no oysters remained on the market at that point. Oysters in Florida have a terminal sale date of 14 days from the time of harvest and most of the hepatitis A cases consumed oysters in late July to early August.1 A voluntary recall of the oysters was declared by the Alabama dealer who shipped the Louisiana oysters to Florida and Alabama. In addition, due to Hurricane Katrina, the harvesting areas in Louisiana had already been closed, thereby controlling for any additional sales of contaminated oysters. The FDA Seafood Safety Specialist in Louisiana reported that all of the original dealer’s records were lost due to the impact of the hurricane. 

Five of the eight Indian River cases, the St. Lucie County case, and the Polk County case ate raw oysters at the same restaurant in Vero Beach.  The restaurant has a 29 cent special on raw oysters every Tuesday night. The restaurant inspection found the oyster shucking area (raw bar) to be dirty and knives used for shucking the oysters were not being properly cleaned. The Dade, Monroe, Pinellas County cases ate raw oysters at the same restaurant in Key West. One Sarasota County case also ate raw oysters at the restaurant in Key West. The Brevard County cases ate raw oysters at a restaurant in Fort Lauderdale. The Lee County case ate oysters at a restaurant in Fort Myer’s Beach.   

Conclusion
Hepatitis A virus (HAV) is usually mild illness characterized by sudden onset of fever, malaise, nausea, anorexia, and abdominal discomfort, followed in several days by jaundice.  The infectious dose is unknown but presumably is 10-100 virus particles. Hepatitis A is diagnosed by finding IgM-class anti-HAV in serum collected during the acute or early convalescent phase of the disease. HAV is excreted in feces of infected persons and can produce clinical disease when susceptible individuals consume contaminated water or foods. Water, salads, and shellfish are the most frequent sources. Contamination of foods in infected workers in food processing plants and restaurants is common. Less than 1% of foodborne outbreaks and cases in Florida are attributed to hepatitis A. Groups at higher risk of infection include children in day care, intravenous drug users and men who have sex with men.  Outbreaks of HAV are common in institutions, crowded housing projects, prisons, and in military forces in adverse situations. In the United States, the percentage of adults with immunity increases with age (10% for those 18-19 years to 65% for those over 50). The incubation period for HAV, which ranges from 10-50 days (mean 30 days) is dependent upon the number of infectious particles consumed. The period of communicability extends from early in the incubation period to about a week after the development of jaundice. Children often do not show signs of clinical disease. When disease does occur, it is usually mild and recovery is complete in 1-2 weeks. HAV has not been isolated from any food associated with an outbreak. No method of routine analysis of food is presently available, but sensitive molecular methods used to detect HAV in water and clinical specimens should provide useful to detect virus in foods2.

This multi-state outbreak of hepatitis A was clearly associated with the consumption of contaminated raw oysters either before or during the harvesting process. While it is always possible to get hepatitis A from raw oysters, it is also rare. Reportedly the last event of this type in Florida was in the late 1980’s3. An outbreak of this sort is something that would be more likely seen in an underdeveloped country with poor sanitation.  Additional cases were reported from Alabama (17) and later, from Tennessee (6), South Carolina (1) and Ohio (1). An abstract on this multi-state outbreak has been submitted by Stephanie Bialek, who performed the EpiAid for Alabama, to the International Conference on Emerging Infectious Diseases to be held March 19-22, 2006 in Atlanta.4

Table 1. Reported Cases of Hepatitis A in Florida Attributed to Raw Oyster Consumption,
Onset Dates August-September 2005
 

 

Case #

County

Age

Sex

Exposure Date

Onset Date

Exposure

PCR Positive

Restaurant Name

Restaurant Location

Oyster tags (Y/N)

Oyster Source

1.         

St. Lucie

59

F

8/2/05

8/23/05

Raw oysters

Match

Restaurant A

Vero Beach

Y

LA

2.         

Indian River

41

M

7/19, 7/26/05

8/22/05

Raw oysters

Not collected 

Restaurant A

Vero Beach

Y

LA

3.         

Indian River

37

M

7/19, 7/26/05

8/22

Raw oysters

Match

A

Vero Beach

Y

LA

4.         

Polk

78

M

7/26/05

8/21

Raw oysters

Match

A

Vero Beach

Y

LA

5.         

Monroe

24

M

8/8/05

8/29

Raw oysters

Not collected

 B

Key West

Y

LA

6.         

Brevard

51

F

7/31/05

8/27

Raw oysters

Match

C

Ft. Lauderdale

Y

LA

7.         

Brevard

20

M

7/31/05

9/3

Raw oysters

Match

C

Ft. Lauderdale

Y

LA

8.         

Brevard

18

M

7/31/05

9/7

Raw oysters

Match

 C

Ft. Lauderdale

Y

LA

9.         

Pinellas

40

M

7/30/05

8/2

Raw oysters

Match

B

Key West

Y

LA

10.      

Indian River

54

M

8/2,8/9, 8/16/05

9/5

Raw oysters 

Match

A

Vero Beach

Y

LA

11.      

Indian River

69

M

8/2/05

9/1

Raw oysters

Match

A

Vero Beach

Y

LA

12.      

Indian River

41

F

N/A

9/13

Secondary case from case #13; wife of case, no oysters consumed

Not collected

N/A

N/A

N/A

N/A

13.      

Indian River

68

M

7/19, 7/26/05

8/26

Raw oysters

Not collected 

A

Vero Beach

Y

Y

14.      

Lee

43

M

8/8/05

9/1

Raw oysters

Not collected 

D

Ft. Myers Beach

Y

LA

15.      

Indian River

42

F

N/A

9/21

Secondary case from case #3; wife of case, no oysters consumed.

Not collected 

N/A

N/A

N/A

N/A

16.      

Indian River

7

M

N/A

9/26

Secondary case from case#3; son of case, no oysters consumed

Not collected 

N/A

N/A

N/A

N/A


1 S. 5L-1.007(g), FAC

2
Bad Bug Book, US Food and Drug Administration, Center for Food Safety and Applied Nutrition, Food Borne Pathogenic Microorganismx and Natural Toxins Handbook, Hepatitis A Virus, http://www.cfsan.fda.gov/~mow/chap31.htmlPage will open in a new window, accessed 10/17/05.

3
Epidemiologic Notes and Reports Foodborne Hepatitis A - Alaska, Florida, North Carolina, Washington. MMWR, April 13, 1990/39(14); 228-232.
4
Bialek, Stephanie. Personal communication, email: 11/10/05.

Janet Wamnes is a regional environmental epidemiologist at the Ft. Pierce Bureau of Community Environmental Health in St. Lucie. Roberta Hammond is the waterborne disease coordinator at the Bureau of Community Environmental Health in Tallahassee and can be reached at 850.245.4444, ext. 4116.

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Influenza 2006: The Laboratory's Role in Pandemic Preparedness and Response

by Melanie Black, MSW

Influenza viruses present a continuing challenge as we approach the 2005-2006 influenza season. Each year, anticipation of the annual influenza epidemic produces concerns about vaccine availability, the severity of the season and the potential emergence of new strains. Laboratory-based surveillance plays a critical role in the characterization of circulating influenza strains and early detection of unusual strains and subtypes. 

On December 6, 2005, the National Laboratory Training Network will sponsor a one and one-half hour teleconference, entitled Influenza 2005: The Laboratory’s Role in Pandemic Preparedness and Response hosted by Carol Kirk, coordinator of the Virology Program and Laboratory Network and Peter A. Shult, PhD., chief virologist and the director of the Communicable Disease Division and Emergency Laboratory Response at the Wisconsin State Laboratory of Hygiene in Madison, Wisconsin. 

This program will provide an overview of the antigenic characteristics of influenza viruses and current laboratory diagnostic methods. The main focus of the presentation will be avian influenza, pandemic preparedness activities, and the laboratory’s critical role in influenza surveillance and pandemic preparedness and response.

This intermediate-level program is designed for clinical and public health laboratorians who perform viral testing. Continuing education credit will be offered to laboratorians based on 1.5 hour of instruction. 

There is no fee for this program. Designate a site representative for each location and register online at http://www.nltn.org/coursesPage will open in a new window and select this course from the list of educational and training programs. If you have difficulty with the on-line registration process, please call 617.983.6285. The registration deadline is December 2, 2005. Upon receipt of your registration, confirmation letters with teleconference details will be emailed. Before the teleconference, download handout materials on the day of the teleconference for participants, call the number provided and use on line only per registration site. This allows all of the participants to be joined with the program speakers. 

In compliance with the Americans with Disabilities Act, individuals needing special accommodations should notify the NLTN at least two weeks prior to the course. For more information, email neoffice@nltn.org.

Melanie Black is the professional training coordinator for the Bureau of Epidemiology at the Florida Department of Health in Tallahassee. To contact her, call 850.245.4444, ext. 2448.

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Mosquito-borne Disease Summary November 6-12, 2005
Rebecca Shultz, MPH, Caroline Collins, Daneshia Roberts, Calvin DeSouza, Carina Blackmore, PhD

During the period November 6-12, 2005, the following arboviral activities (St. Louis encephalitis [SLE] virus, eastern equine encephalomyelitis [EEE] virus, Highlands J [HJ] virus, West Nile [WN] virus and dengue virus) were recorded in Florida: 

Humans: (County)

Onset Month

SLE

WN

EEE

HJ

 

None

 

 

 

 

 

 

Sentinel Chickens: (County)

Collection Date

SLE

WN

EEE

HJ

Seroconversion Rate

Alachua

 10/18

 

1

2

 

16.67 EEE, Unk. WN 

Duval

10/25

 

1

 

 

4.00

Hillsborough

 10/18, 11/1

 

2

 

 

5.40

Indian River

10/6, 10/13, 10/20

 

2

 

1

6.38 WN, 1.06 HJ

Jackson

10/18

 

 

1

1

4.35 EEE, 4.35 HJ

Jefferson

10/30

 

1

 

 

9.09

Leon

10/28

 

2

 

 

6.45

Manatee

10/30

 

1

 

 

2.13

Orange

10/17

 

 

 

1

1.45

Osceola

10/26

 

 

 

3

5.56

Putnam

10/27, 10/28

 

2

 

 

11.11

St. Johns

10/31

 

2

 

 

3.64

St. Lucie

10/14

 

1

 

 

2.78

Walton (North)

10/3, 10/11, 10/13, 10/18, 10/20, 10/28

 

 

14

1

13.33 EEE, 2.50 HJ

Dead Birds:
(County)

 

Collection Date

SLE

WN

EEE

HJ

Species

None

 

 

 

 

 

 

Horses: (County) 

Onset Date

SLE

WN

EEE

HJ

Status

Citrus

11/01

 

1

 

 

Alive

Union

10/30

 

 

1

 

Unknown

Wild Live Captive Birds: (County)

Collection Date

SLE

WN

EEE

HJ

Species

Okaloosa

11/02

 

 

3

 

All Cardinals

Santa Rosa

11/01

 

 

1

 

Blue Jay

Walton (North)

11/05

 

 

1

 

Cardinal

Washington

11/03

 

 

1

 

Cardinal

Mosquito Pools:
(County)

Collection Date

SLE

WN

EEE

Calif. Group

Species

None

 

 

 

 

 

 

Alachua, Hillsborough, Nassau and Walton counties are currently under medical advisory for mosquito-borne disease. Pinellas, Pasco, Duval and Marion Counties are currently under a medical alert for mosquito-borne disease.   

Dead birds should be reported to www.wildflorida.org/bird/.Page will open in a new window See the web page for more information at www.MyFloridaEH.comPage will open in a new window. The Disease Outbreak Information Hotline offers recorded updates on medical alerts status and surveillance at 888.880.5782.

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 Woman with thermometer

     

           This Week on EpiCom
                                  
    by Christie Luce

The Bureau of Epidemiology encourages Epi Update readers to not only register on the EpiCom system at https://www.epicomfl.netPage will open in a new window but to sign up for features such as automatic notification of certain events (EpiCom_Administrator@doh.state.fl.us) and contribute appropriate public health observations related to
any suspicious or unusual occurrences or circumstances. EpiCom is the primary method of communication
between the Bureau of Epidemiology and other state medical agencies during emergency situations.
  • Red Tide in Gulf of Mexico
  • Hepatitis A in Pinellas County associated with travel to foreign countries
  • Gastroenteritis illness in Palm Beach County hurricane shelter
  • Unexplained death of woman in Orange County

Christie Luce is administrator of the Surveillance Systems Section in the Bureau of Epidemiology. She can be reached at 850.245.4444, ext. 2450.Divider
 

                         Weekly Disease Table
                                                          by D'Juan Harris, MSP

Click herePage will open in a new window to review the most recent disease figures provided by the Florida Department of Health Bureau of Epidemiology.

D'Juan Harris is a GIS specialist in the Surveillance Systems Section of the Bureau of Epidemiology.
He can be reached at 850.245.4444, ext. 2435.

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      Bureau of Epidemiology                       Epi Update Archives                                      CDCPage will open in a new window

      FL Department of Health                              My Florida                                         Contact Us

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Epi Update is a journal of the Florida Department of Health Bureau of Epidemiology and is
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