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EPI UPDATE
A weekly publication by the Bureau of Epidemiology
For April 19, 2000
"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 et al. Int. J of Epidemiology 1976; 5:29-37.
Richard S. Hopkins, MD, MSPH, Bureau Chief, State Epidemiologist
Don Ward, Surveillance Section Administrator, Epi Update Managing Editor
Jill H. Parker, MSP, Epi Update Editor
Bureau of Epidemiology Frequent Contributors:
|
Steven Wiersma, MD, MPH,
Deputy State Epidemiologist |
William J. Bigler, PhD, MS,
Senior Epidemiologist |
Jodi Baldy, MPH,
Biological Scientist IV |
|
Ursula E. Bauer, PhD,
Chronic Disease Epidemiologist |
John Werth, MA,
Bureau Education Coordinator |
Lisa Conti, DVM, MPH,
State Public Health Veterinarian |
Regional Epidemiologists:
|
Dolly Katz, PhD, MPH,
SE Florida |
Roger Sanderson, RN, MA,
SW Florida |
Carina Blackmore, MS Vet. Med., PhD,
NE Florida Carina Blackmore, MS Vet. Med., PhD, |
Zuber Mulla, MSPH,
Central Florida Carina Blackmore, MS Vet. Med., PhD, |
Gérard Krause, MD, DTMH,
NW Florida |
Please print out this material and share with epidemiology staff, county health department directors, administrators, medical directors, nursing directors, environmental health directors and others with an interest in information of this type. Thank you.
The Bureau of Epidemiology is available 24 hours a day, 7 days
a week for consultation at our main number (850/245-4401) PLEASE NOTE:
Consultation after 5 p.m. & on weekends is intended for emergencies.
In this issue:
- Outbreak of Hepatitis A in a Daycare Center
- CDC Alert: Hepatitis A Associated with Consumption of Frozen Strawberries
- CDC Meningitis Alert: Pilgrims Returning from Haj, Saudi Arabia
- Injury Statistics Web Site
- Annual Florida Epidemiology Meeting Abstract Deadline Extended
- Florida Past – Mother’s Day
- Weekly Disease Table: Week 15
1. Outbreak of Hepatitis A in a Daycare Center
Frances Bosbyshell, RN, MPH and Jylmarie Kintz, MPH
BACKGROUND
An outbreak of hepatitis A occurred in a daycare center in Hillsborough County beginning in March 2000. The first two cases reported to the Health Department had links to daycare center attendees and were also household contacts of each other. The third and fourth cases were reported on March 14th and 15th. It was discovered on March 15th that the four cases were linked to the daycare center and that there were no other apparent links between the cases. At that time, the center was visited and an initial letter sent home to parents alerting them to the symptoms of hepatitis A and actions to take if their child developed symptoms. The daycare director also received information on appropriate infection control measures. The daycare has a total of 79 children in attendance and 10 staff members. The children range from infants to after school ages.
METHODS
The case information was obtained from providers and by face to face interview with each case at home. The Department of Health case definition for confirmed and probable cases of hepatitis A was used to classify the cases. The daycare staff supplied the information on daycare attendees and staff.
RESULTS
Currently, a total of 14 cases of hepatitis A have been linked to the daycare. Five cases have occurred in attendees, one case in an employee and 8 cases in family members of attendees. The 5 attendees include four children aged either two or three and one after- school-aged child. The employee and family members range in age from 14 to 39. The onset date of the first case was February 20th, and the latest case's onset was April 1st.
The following table lists the cases chronologically by onset date.
|
Date Reported to Health Dept. and Reporter |
Date onset |
Lab |
Attendee, family member or employee |
|
3-14 SHO |
2-20 |
Igm+ |
family member |
|
3-03 parent |
2-22 |
Igm+ |
family member |
|
3-10 physician |
2-29 |
Igm+ |
family member |
|
3-15 new daycare |
3-1 |
Igm+ |
attendee |
|
3-16 same |
3-1 |
Igm+ |
attendee |
|
3-22 daycare |
3-10 |
Igm+ |
attendee |
|
3-23 SHO |
3-11 |
Igm+ |
family member |
- parent
|
3-18 |
ele. LFT's |
attendee |
|
3-22 physician |
3-19 |
ele. LFT's |
attendee |
|
4-04 friend of case |
3-20 |
ele. LFT's |
employee |
|
3-28 physician |
3-23 |
ele. LFT's |
family member |
|
4-03 family |
3-29 |
ele. LFT's |
family member |
|
4-04 hospital |
3-29 |
Igm+ |
family member |
|
4-05 family |
4-01 |
ele. LFT's |
family member |
A small number of people had their entire families tested for hepatitis A though this was not recommended by the health department. As a result, two asymptomatic individuals with Igm+ lab results were reported but not considered in the case count.
ACTIONS AND RECOMMENDATIONS
The Control of Communicable Diseases Manual and State epidemiology office were consulted to formulate recommendations for immune globulin. Due to the four cases and findings of poor infection control practices at the daycare, it was decided to require immune globulin prophylaxis for all attendees and staff and recommend it for the families of all the children in the daycare. In addition, the daycare center director received a letter of recommendations that included the following areas: immune globulin requirements, exclusions, handwashing and environmental controls. The local licensing agency is assisting with enforcement of the recommendations.
The immune globulin injections were administered either at the daycare or in the health department van parked at a nearby health department clinic site open from 8am to 7pm for three days. A total of 191 immune globulin injections were given between March 21st and March 24th. Over half of the injections were administered in the van. The injection has been received by 100% of the staff and attendees and 70% of the families. Immune globulin has been administered to contacts of cases reported after March 24th.
CONCLUSION
The source of this outbreak has not been identified. Due to the fact that the first cases occurred in family members of attendees, the initial case or cases in the daycare likely occurred in mid- to late December. (The incubation period for hepatitis A is 15 to 50 days). No daycare attendee, employee or family member has reported symptomatic illness with jaundice in the months preceding the outbreak. It is unlikely to be a foodborne outbreak because the cases are occurring gradually and not all at once. Considering just the first three cases reported, they are household contacts to attendees in several age groups and a daycare employee, which made it difficult to establish a common element early in the outbreak. Currently all the cases have a link to either the two or three year old class. The after-school-aged child spent a significant amount of time near the younger children during the exposure period. The two and three year olds have separate class rooms but share a common bathroom. There is occasional mixing of the classes at the daycare among these age groups.
A major focus of the intervention has been providing information to the center on appropriate infection control techniques. Two problems found at the daycare that very likely contributed to the outbreak were lack of proper handwashing procedures and not excluding children with diarrhea. Staff did not consistently supervise children's handwashing and were cited for not washing hands after diaper changes. The daycare director expressed difficulty excluding symptomatic children from the center. Physicians often write releases when children are still symptomatic and parents do not want to miss any work. This struggle between the directors, physicians and parents has been mentioned by other directors in the county as well. We stressed to the director that it is her responsibility to protect all the children in the center by setting policies on when children need to be excluded and to adhere to them regardless of physician or parental pressure. This outbreak is a good example of the ability of hepatitis A to spread through asymptomatic cases and highlights the importance of proper infection control practices in daycare settings.
2. CDC Alert: Hepatitis A Associated with Consumption of Frozen Strawberries
Date: April 19, 2000
From: Hepatitis Branch
Division of Viral and Rickettsial Diseases, NCID
Subject: Hepatitis A associated with consumption of frozen strawberries
To: State and Territorial Epidemiologists
State and Territorial Public Health Laboratory Directors
SENT BY FAX and E-MAIL
There has been a recent cluster of cases of hepatitis A in Massachusetts linked to the consumption of commercially processed frozen strawberries. Information on the harvesting, processing and distribution of the potentially contaminated frozen strawberry products is currently being investigated by the Food and Drug Administration, and will be provided in a separate communication when available.
The Boston Communicable Disease Control Division and the Massachusetts Department of Public Health are investigating 7 cases of acute hepatitis A among persons who attended an ice cream party at a hospital cafeteria on February 11 and 12, 2000. Foods served at the event included commercially prepared ice cream, and a variety of toppings including frozen strawberries, whipped cream, candies, nuts, and cherries. All 7 persons with hepatitis A became ill between March 7 and March 21, 2000. No ill food handlers have been identified, and all are negative for IgM antibodies to hepatitis A virus.
A case control study that included all cases and 38 well controls who ate at the ice cream party indicated that eating frozen strawberries was the only food associated with illness (OR 36.4, 95% CI 3.8-infinity). All cases ate frozen strawberries at the party.
Because no known food handlers have evidence of infection, and because the event reportedly involved little hand contact with the food served, contamination of the frozen strawberries likely occurred at some point during harvest, processing or distribution.
This investigation is ongoing and these findings should be considered preliminary. We are requesting that state and local health departments look at their hepatitis A reporting and be on the lookout for recent hepatitis A clusters or unexplained increases in cases that could be associated with the consumption of frozen strawberries. In such instances, recently identified cases of hepatitis A should be asked about frozen strawberry consumption, including frozen strawberries consumed in commercial or institutional settings. Serum specimens from persons with hepatitis A during the acute phase of their illness (e.g., the first diagnostic specimen) who report frozen strawberry consumption should be saved (frozen) for possible viral sequencing studies. Please contact Dr. Stephanie Bialek of the Hepatitis Branch at CDC (404 371 5910), SBialek@CDC.gov, for additional information and assistance.
Anthony Fiore, M.D., M.P.H.
Medical Epidemiologist, Hepatitis Branch
Mailstop G37
Centers for Disease Control and Prevention
Atlanta, GA 30333
3. CDC Meningitis Alert: Pilgrimage in Saudi Arabia
Cases of serogroup W-135 in association with the Haj in Saudi Arabia have been reported throughout Europe, including the United Kingdom, France, and Germany, with a total so far of 24 cases. These reports are of cases of W-135 among pilgrims returning from the Haj or their close contacts. Saudi Arabia requires meningococcal vaccine for all entering pilgrims, but the vaccine varies by country. Since the quadrivalent A/C/Y/W-135 vaccine is the only vaccine licensed in the U.S., most U.S. pilgrims probably have received this vaccine and therefore are protected. Most other countries use a bivalent A/C meningococcal vaccine which would not protect vaccinees. It is possible that some U.S. pilgrims were vaccinated in other countries with a bivalent vaccine and the vaccine is not 100% protected. Further, since the polysaccharide vaccine does not provide protection against carriage, close contacts of returning Hajjis may still be at risk. CDC is very interested in hearing about any cases of W-135, which is typically rare in the U.S, or any cases of illness consistent with meningococcal disease among returning Hajjis or their close contacts. Also, CDC would be very interested in molecular subtyping of the isolates so please save any isolates that are related to their cases.
Update on N. meningitidis among Pilgrims to Mecca - Identification of U.S. Cases
On April 12th, the Meningitis Special Pathogens Branch, NCID, CDC notified the EIN regarding meningococcal illness due to serogroup W135 in travelers to Saudi Arabia for the Haj, the annual pilgrimmage to Mecca. The number of reported cases has risen from 24 to 38 (including 21 known family contacts) from the United Kingdom, France, Germany, Pakistan, and the Netherlands. All occurred since March 21, 2000. There have been at least 7 fatalities.
Two recent cases of group W135 meningococcal disease have been identified by the New York City Department of Health, Communicable Disease Program (212-788-9830); one is a returning pilgrim, and the second is a close family contact of a returning pilgrim. These represent the first known American cases associated with this outbreak. We appreciate the participation so far from EIN members for this.
While all pilgrims to Mecca are required to be vaccinated against Neisseria meningitis, bivalent vaccines administered overseas do not cover group W135 strains, and no vaccine eliminates carriage and transmission of the bacterium to household contacts.
Please:
1) Notify your state and local health department of all cases of meningococcal disease
2) Report any case of meningococcal disease in a person returning from Saudi Arabia to the Meningitis and Special Pathogens Branch, NCID, CDC by phone (404-639-3158) or fax (404-639-3059).
3) Report any case of meningococcal disease in a person who is a close contact of someone returning from Saudi Arabia
4) Report any cases of serogroup W-135 meningococcal disease that might
be related to recent travel to the Middle East or Africa.
5) Save and send Neisseria meningitidis isolates from the types of cases
described above.
6) Inform colleagues treating travelers from Saudi Arabia about the
possibility of meningococcal meningitis in their patients.
Thank You,
Meningitis and Special Pathogens Branch
National Center for Infectious Diseases, CDC
4. Injury Statistics Website
Zuber D. Mulla, Bureau of Epidemiology
The CDC’s National Center for Injury Prevention and Control has developed an interactive system that provides customized injury-related mortality data. This injury epidemiology reporting system is called WISQARS
(Web-based Injury Statistics Query and Reporting System).
A brief sample report is shown below. The rates are for all races and ages and both genders combined, and all intents (unintentional, suicide, homicide, homicide/legal, undetermined intent, and legal intervention).
|
Age-adjusted Injury Mortality Rates (per 100,000) for 1997
|
|
|
|
TYPE |
FLORIDA |
UNITED STATES |
|
Drowning/submersion |
2.62 |
1.75 |
|
Firearm |
13.22 |
12.20 |
|
Medical care, Adverse effects |
0.34 |
0.68 |
5. Annual Florida Epidemiology Meeting Abstract Deadline Extended
The deadline for abstracts has been extended to May 8, 2000.
6. Florida Past – Mother’s Day
William J. Bigler, PhD
Excerpts from an interesting piece by Ruth Mettinger, R.N., Director of Nursing for the State Board Of Health that appeared in the May 1937 issue (Vol29. No.5) of Florida Health Notes.
Long in advance of the second Sunday in each May, the florists, the telegraph companies and the greeting card concerns all tell us that it will soon be mother’s day. We see advertisements in papers and magazines, in shop windows and other prominent places, admonishing us to "Remember Mother." Accompanying these advertisements, there usually is a picture of a nice, comfortable-looking mother, verging on middle age. But the picture and the slogan rarely bring to mind the picture of mothers, especially young mothers, struggling to bring forth a new life into this world; mothers dying because they do not know the simplest hygienic measures of pregnancy; mothers who become invalids for life because they have borne a child; mothers who bring forth diseased and sickly children – no we do not think of these as we see the sweet, gray-haired women of the magazine advertisements…
The real tragedy in maternal deaths is that so many of them are not necessary; that just a little knowledge might have saved a life…. We as public health nurses, by persistent teaching, can do much to reduce maternal mortality. This must involve not only the teaching of the prospective mothers themselves – and fathers, too - and the imparting of concrete information, but must also include appreciation of what constitutes good medical and nursing care.
SEEING IS BELIEVING
Would you believe that the poorest and most illiterate man in the swamps and backwoods of Florida can be taught to made his home a habitable place in which to live? That his wife can be taught the meaning of cleanliness and the care of herself and family before and after her children are born? That [because] the materials [are] near at hand and theirs for the taking, their home can be transformed from a hovel into a palace to them out of a few discarded boxes, a little paint, a few nails and some effort? That they can be taught that the health and comfort of their children and themselves is paramount to their happiness?
It is said that people are more eye-minded that ear-minded …With this is mind the Florida State Board of Health has available for lending to Directors of County Health Units and public Health Nurses, various types of equipment with which to demonstrate the many articles that can be made with the resources at hand…
Would you believe that a baby’s slat bed can be made out of discarded boxes, short lengths of lumber, (many times given away as too small to sell ), five cents’ worth of small nails, two sets of screws costing five cents and two metal strips to hold the mosquito netting for twenty-five cents and the paint for ten cents, making a total of forty-five cents?
Would you believe that the fluff from "Cattails" found growing in almost every county in Florida could be used for making a baby’s mattress after it had been baked in a warm oven to kill insects? By the way, this cattail fluff is much like kapok.
Would you believe that Florida moss when cured makes a comfortable mattress, using flour sacking for ticking? That a homemade bed-bath stand can be made of discarded wooden boxes and scrap lumber? That and improvised bed pan (12 "x 17") can be made from a biscuit pan, costing from ten to fifteen cents, and a section of prune box with a little paint? An ordinary bed pan when purchased costs about two dollars and a half.
Would you believe that baby’s improvised potty can be made from a cigar box and an empty coffee can, and that mothers are being taught to begin to teach their children to use the potty when just a few weeks old?
Flour sacks have become an important factor in the homes of many Florida families and the thin ones are used for babies' dresses and petticoats. Even if you paid a dollar a yard for it you could not get anything softer for a new baby’s delicate skin. Burlap sacks (feed sacks) can be made into expensive looking coat suits and sport dresses. The uses to which these crude articles can be put are being taught to many people of our State by showing them a finished article and explaining the way in which it is made. To see and touch the original of the article to be made has been found the simplest method of teaching most people.
It is known that Florida has the unenviable reputation of leading every State but one in its high maternity death rate. The care of the mother before the birth of her child and the care of her baby is being particularly stressed. The significance of proper lighting, cleanliness and sanitation is taught to mothers through demonstrations with miniature model houses and articles.
Cattle are dipped for ticks – hogs are treated for cholera – what is your county doing to reduce the maternal and infant death rate?
7. Weekly Disease Table: Week 15
County-Confirmed Cases, Sorted Alphabetically by Disease
(NR represents years that the disease lacked status as a reportable condition)
|
DISEASE |
1997 TO DATE |
1998 TO DATE |
1999 TO DATE |
3 YEAR AVERAGE
TO DATE |
1999 TOTAL CASES |
2000 TO DATE |
|
Amebiasis |
9 |
9 |
8 |
8.7 |
66 |
1 |
|
Anthrax |
0 |
0 |
0 |
0 |
0 |
0 |
|
Botulism |
0 |
0 |
0 |
0 |
3 |
0 |
|
Brucellosis |
0 |
1 |
0 |
0.3 |
3 |
0 |
|
Campylobacteriosis |
201 |
142 |
199 |
180.7 |
985 |
148 |
|
Ciguatera |
2 |
0 |
0 |
0.7 |
2 |
0 |
|
Cryptosporidiosis |
18 |
26 |
20 |
21.3 |
175 |
5 |
|
Cyclosporiasis |
0 |
2 |
0 |
0.7 |
5 |
1 |
|
Dengue |
0 |
1 |
1 |
0.7 |
5 |
1 |
|
Diphtheria |
0 |
0 |
0 |
0 |
0 |
0 |
|
E. coli O157:H7 |
13 |
3 |
9 |
8.3 |
54 |
5 |
|
E. coli , other (known serotype) |
2 |
2 |
7 |
3.7 |
16 |
1 |
|
Ehrlichiosis, Human |
0 |
0 |
0 |
0 |
2 |
0 |
|
Encephalitis, Eastern Equine |
0 |
0 |
0 |
0 |
2 |
0 |
|
Encephalitis, St. Louis |
0 |
0 |
0 |
0 |
3 |
0 |
|
Encephalitis, other (known organism) |
5 |
3 |
2 |
3.3 |
5 |
1 |
|
Encephalitis, post-infectious1 |
3 |
0 |
1 |
1.3 |
14 |
0 |
|
Giardiasis (acute) |
324 |
261 |
204 |
263 |
1315 |
206 |
|
Haemophilus influenzae , invasive1 |
5 |
14 |
11 |
10 |
48 |
13 |
|
Hansen’s Disease (Leprosy) |
0 |
2 |
0 |
0.7 |
3 |
0 |
|
Hantavirus Infection |
0 |
0 |
0 |
0 |
0 |
0 |
|
Hemolytic Uremic Syndrome |
2 |
0 |
1 |
1 |
7 |
1 |
|
Hemorrhagic Fever |
0 |
0 |
0 |
0 |
0 |
0 |
|
Hepatitis A |
121 |
147 |
153 |
140.3 |
797 |
93 |
|
Hepatitis B |
84 |
71 |
81 |
78.7 |
533 |
72 |
|
Hepatitis C2 |
NR |
NR |
9 |
NR |
56 |
9 |
|
Hepatitis Non-A, Non-B |
18 |
18 |
0 |
12 |
10 |
6 |
|
Hepatitis, perinatal B2 |
NR |
NR |
0 |
NR |
|
0 |
|
Hepatitis, unspecified |
0 |
0 |
2 |
0 |
16 |
2 |
|
Hepatitis, +HBsAg, pregnant woman2 |
NR |
NR |
1 |
NR |
232 |
43 |
|
Lead Poisoning |
318 |
396 |
114 |
276 |
894 |
170 |
|
Legionellosis |
5 |
13 |
7 |
8.3 |
28 |
9 |
|
Leptospirosis |
0 |
0 |
0 |
0 |
1 |
0 |
|
Listeriosis2 |
NR |
NR |
5 |
NR |
32 |
3 |
|
Lyme Disease |
4 |
6 |
2 |
4 |
48 |
5 |
|
Malaria |
18 |
16 |
21 |
18.3 |
97 |
11 |
|
Measles |
0 |
1 |
1 |
0.7 |
2 |
0 |
|
Meningococcal Disease (N. meningitidis) |
59 |
45 |
35 |
46.3 |
122 |
28 |
|
Meningitis, Group B Streptococci |
3 |
2 |
5 |
3.3 |
14 |
4 |
|
Meningitis, Haemophilus influenzae1 |
3 |
4 |
6 |
4.3 |
13 |
1 |
|
Meningitis, Streptococcus pneumoniae |
28 |
36 |
41 |
35 |
98 |
24 |
|
Meningitis, Listeria monocytogenes |
0 |
2 |
2 |
1.3 |
12 |
1 |
|
Meningitis, other bacterial (including unspecified) |
13 |
12 |
15 |
13.3 |
61 |
19 |
|
Mercury Poisoning |
0 |
0 |
1 |
0.3 |
7 |
1 |
|
Mumps |
7 |
2 |
1 |
3.3 |
6 |
0 |
|
Neurotoxic Shellfish Poisoning2 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Pertussis |
22 |
11 |
7 |
13.3 |
85 |
6 |
|
Pesticide Poisoning |
0 |
1 |
1 |
0.7 |
32 |
0 |
|
Plague |
0 |
0 |
0 |
0 |
0 |
0 |
|
Poliomyelitis |
0 |
0 |
0 |
0 |
0 |
0 |
|
Psittacosis |
0 |
0 |
0 |
0 |
0 |
0 |
|
Rabies, Animal |
82 |
67 |
45 |
64.7 |
176 |
35 |
|
Rocky Mountain Spotted Fever |
1 |
1 |
1 |
1 |
2 |
0 |
|
Rubella, including congenital |
0 |
1 |
0 |
0.3 |
1 |
1 |
|
Salmonellosis |
339 |
353 |
387 |
359.7 |
3056 |
241 |
|
Shigellosis |
262 |
324 |
347 |
311 |
1487 |
275 |
|
Smallpox2 |
NR |
NR |
0 |
NR |
0 |
0 |
|
Staphylococcus aureus, (GISA/VISA)2 |
NR |
NR |
0 |
NR |
0 |
0 |
|
Staphylococcus aureus, (GRSA/VRSA)2 |
NR |
NR |
0 |
NR |
0 |
0 |
|
Streptococcal Disease, invasive Group A |
11 |
14 |
14 |
13 |
93 |
43 |
|
Streptococcus pneumoniae , invasive disease |
63 |
159 |
174 |
132 |
686 |
242 |
|
Tetanus |
0 |
1 |
1 |
0.7 |
3 |
0 |
|
Toxic Shock Syndrome |
0 |
3 |
2 |
1.7 |
6 |
0 |
|
Toxoplasmosis |
1 |
4 |
3 |
2.7 |
16 |
1 |
|
Typhoid Fever |
3 |
6 |
16 |
8.3 |
23 |
1 |
|
Vibrio cholerae (serogrp O1) |
0 |
0 |
0 |
0 |
1 |
0 |
|
Vibrio cholerae (serogrp Non-O1) |
3 |
1 |
2 |
2 |
9 |
0 |
|
Vibrio vulnificus |
1 |
1 |
2 |
1.3 |
23 |
0 |
|
Vibrio other (including unspecified) |
7 |
3 |
8 |
6 |
48 |
6 |
|
Yellow Fever |
0 |
0 |
0 |
0 |
0 |
0 |
1
Haemophilus influenzae can be the agent responsible for disease under three of the reportable conditions listed-: "Haemophilus influenzae, invasive" and under "Encephalitis, post infectious." Cases of Haemophilus influenzae meningitis are reported under "Meningitis, H. influenzae."
2 The reportable disease rule was revised in July, 1999. Kawasaki Disease, Histoplasmosis, Reye Syndrome, and Typhus were deleted from the weekly disease table since cases are no longer reportable as of July 4, 1999. Hepatitis C; perinatal hepatitis B; hepatitis B +HbsAg, pregnant woman; listeriosis; smallpox, S. aureus (GISA/VISA) and S. aureus (GRSA/VRSA) were added to the reporting requirements as of July 4, 1999. Paralytic shellfish poisoning is now referred to as neurotoxic shellfish poisoning.
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