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Vol. II, No. 09~ EINet News Briefs ~ May 04, 1999
****A free service of the APEC Emerging
Infections Network*****
The EINet listserv was created to foster discussion,
networking, and collaboration in the area of emerging infectious diseases
(EID's) among academicians, scientists, and policy makers in the AsiaPacific
region. We strongly encourage you to share their perspectives and experiences,
as your participation directly contributes to the richness of the "electronic
discussions" that occur. To respond to the listserv, use the reply function.
In this edition:
- Update on Japanese Encephalitis/Nipah
virus
- Overview of infectiousdisease
information from PROMED and other sources
- Updates from previous bulletins
- Notices
- How to add colleagues to the EINet
listserv
1. UPDATE ON JAPANESE
ENCEPHALITIS/NIPAH VIRUS
Two more pig farm workers from Bukit Pelandok succumbed to viral encephalitis
at the Kuala Lumpur Hospital on April 23, though authorities do believe
that the epidemic is on the decline following the culling of 900,000 pigs,
and expect to see fewer cases. A national antimosquito campaign was launched
on April 20 to intensify efforts to destroy mosquitobreeding grounds.
The mechanism of transmission of the Nipah virus remains unknown, and
early indications of test results show that there is low or no humantohuman
transmission. Direct contact with pigs appears to be the most plausible
explanation for now. Extensive followups for at least a year on discharged
patients have been formulated to study the clinical features of the disease.
The cause of 259 cases of encephalitis still remains unknown. Health care
workers tending to patients have been instructed to practise "barrier
nursing", and blood samples from 400 hospital staff members have been
collected for testing. The first batch of samples from 183 staff tested
negative for the Nipah virus.
Pig farm workers have also been advised to wear protective clothing, and
the ministry has distributed 800,000 leaflets on precautionary measures
to schools and those in the pig industry. New areas in the northern state
of Perak (Gopeng and Bidor) were found to have infected pigs and more
than 8,000 pigs are expected to be destroyed on the next few weeks. There
is confusion as to whether an infected pig was detected at a farm in Seelong
in the state of Johor Baru based on conflicting reports given by the Health
Minister Dr. Chua and Johor Mentri Besar Datuk Abdul Ghani Othman. Singapore
has resumed import of live pigs from Indonesia, and a cold chain system
will be incorporated in the country by November 2000, to allow only chilled
meat to be made available to the public. This is to minimize contact with
live pigs and to facilitate more stringent checks on the meat.
788 stray dogs were killed in Negeri Sembilan following positive tests
in at least two dogs in the region. The dogs were believed to have eaten
the carcasses of infected pigs. Health authorities advised pet owners
to quarantine their dogs and cats, and have them tested for the Nipah
virus. Blood samples from goats, horses, birds, turkeys, cattle and wild
animals have been collected for testing. Two horses at the Iskander Polo
Club in Ipoh found to be positive for the Nipah virus were put down, and
the Club was placed under quarantine as it was located very near to pig
farms in Tambun, Ampang, and Ulu Piah. 4,500 horses nationwide are to
be tested for the Nipah virus, and results of the second batch of samples
sent from the club were expected soon from Australia. In summary, it appears
that the Nipah virus has spread to other species, and dogs and cats have
been confirmed as carriers by the Veterinary Services Department. Taiwan
has now added dogs to its list of banned live imports from Malaysia.
164 pig farms in the Kinta district will be closed down by the state government
and no new licences will be issued for farms to operate in the area. Farmers
outside the buffer zone have asked the government to help cull their pigs
the reason being that there was no demand for pork. Coordinated control
measures adopted by the Health and Veterinary Services appear to be successful
in preventing the occurrence of new cases, and a surveillance programme
to survey all of the more than 1000 pig farms in Malaysia for the Nipah
virus will soon get underway. This program will be instituted by the Veterinary
Research Institute in IPOH, in collaboration with the Centers for Disease
Control and CSIRO Australian Animal Health Laboratory. Pig farming activities
in Bukit Pelandok will be allowed only at the integrated pig farming area
from now on to prevent future outbreaks. This area has a proper system
required for clean farming activities and has an oxidation pond and proper
drainage.
[ProMed, April 21 May 03, 1999]
[Reuters, April 20 29, 1999]
[Associated Press, April 20, 1999]
[Xinhua, April 20, 1999] [
Star Online, May 03, 1999]
[The Straits Times, May 03, 1999]
2. OVERVIEW OF INFECTIOUSDISEASE
INFORMATION FROM PROMED Here is our regular summary of
relevant AsiaPacific EID issues based on postings to the ProMED Electronic
Network, which is a prototype for a communications system to monitor emerging
infectious diseases globally as an initiative of the Federation of American
Scientists (FAS), cosponsored by WHO.
ASIA
HONG KONG CHOLERA O139
A 45year old man has been diagnosed with Vibrio cholerae O139, and health
officials have issued an advisory to the public to be on guard against
the disease. The man's family members have been given health education,
and investigations suggest that cross contamination with raw seafood and
cooked food could have resulted in the infection. This is the second case
of cholera reported in Hong Kong this year, the first one being an imported
case. V. cholerae O139 was first identified as a new serotype during large
scale epidemics of severe dehydrating diarrhoea, typical of cholera in
India and Bangladesh in late 1992. [ProMed, April 23, 1999]
JAPAN SALMONELLA INFECTION FROM DRIED SQUID
Contaminated dried squid has been found to be the cause of food poisoning
in at least 453 people in 38 of Japan's 47 prefectures between late March
and April. Officials have traced the squid to a factory in Yato, Aomori
Prefecture, that used well water contaminated with salmonella. Production
was halted on April 6 for an indefinite period by health officials. According
to officials, three distributors sold the product under eight different
labels.
[ProMed, April 16㪳, 1999]
KOREA EPIDEMICS ON RISE
Health authorities are on alert following frequent outbreaks of epidemics
this year as a result of the unseaonably high temperatures gripping the
country. 737 people have been affected by first and second grade epidemics
in the first three months of this year marking a 3.2 fold increase from
last year. The number of people affected by dysentery, a first grade epidemic,
drastically increased to 309 by the end of March from just 6 during the
same period of last year. 700 people were diagnosed with food poisoning
in the month of April alone. Parotitis, a less severe second grade epidemic
is rapidly spreading in South Chungchong Province and the southern resort
island of Cheju. Four patients were diagnosed with leptospirosis, a waterborne
disease which usually occurs in autumn at harvest time. No cases were
reported during the first three months of last year. 35 people have contracted
haemorrhagic fever, compared to only 10 from last year. The early arrival
of the heat wave this year has facilitated the spread of infectious diseases,
and people have been advised to maintain sanitary conditions in preparation
for the annual summer rainy spell.
[Korea Herald, April 23, 1999]
KOREA KOREAN HEMORRHAGIC FEVER
The Health and Welfare Ministry has reported that 35 people have contracted
Korean Haemorrhagic Fever this year compared to 10 during last year. This
fever is caused by the Hantaaan virus which is a hantavirus belonging
to the family Bunyaviridae. The disease is most common during autumn and
winter in Kyungkido, Seoul, Chungcheongdo and Kwangwondo. Rates vary from
1 to 4/100,000 per year.
[ProMed, April 27㪵, 1999]
MALAYSIA DENGUE ADVISORY
The Health Minister, Datuk Chua Jui Meng has warned of a large scale outbreak
of dengue/dengue haemorrhagic fever in six states this year, if breeding
grounds of the Aedes mosquito are not cleared immediately. The number
of cases have increased 20fold since 1986 (1,408) to 27,373 in 1998.
A six percent increase in cases between January and April 10 this year
was documented compared to last year. Selangor, Kuala Lumpur, Perak, Pahang,
Kedah, and Pulau Pinang have been named as the six states that face the
threat of an outbreak.
[Bernama, April 28, 1999]
VIETNAM THREAT OF MALARIA EPIDEMIC
An epidemic of malaria is looming in many parts of Vietnam with health
authorities calling for urgent measures to curb its spread. More than
39,000 people have been reported to be infected nationwide and 29 recorded
in the first two months of this year. It appears that malaria has been
reemerging as a major public health problem since 1997. The first signs
began to occur in 1997, and in 1998 the number of infectious cases rose
by 20% compared to the previous year. Vietnam's National Malaria Prevention
Project has developed a plan of action to prevent an epidemic this year
with an aim to reduce the number of infectious cases by 10% and deaths
by 5%.
[Xinhua, April 22, 1999]
OCEANIA
AUSTRALIA (QUEENSLAND) DENGUE
Two cases of dengue have been reported in Townsville in the Healtley/Cranbrook
area. These are the first locally acquired cases in Townsville. The type
of dengue virus has not been determined as yet. The last outbreak of dengue
in Townsville in 1992 infected 15% of the population, though no dengue
haemorrhagic fever was reported. Charters Towers, a rural town, about
110 km inland was also involved in this outbreak, and at least 20% of
the adults in this community seroconverted during this outbreak.
[ProMed, April 30, 1999]
AUSTRALIA NEWCASTLE DISEASE
Australia is currently experiencing the worst outbreak of exotic disease
among animals in its history. The highly contagious Newcastle disease
that has afflicted chickens at Mangrove Mountain north of Sydney has the
potential to spread to other farms, and an additional 300 emergency workers
have been deployed from Queensland to help control the outbreak. More
than 100,000 chickens are being killed everyday, and though only 2 million
chickens were expected to be killed initially, another 3 million chickens
may have to be destroyed in the surrounding districts of Peats Ridge and
Somersby.
[ProMed, May 03, 1999]
AMERICAS
CANADA E. COLI, BEEF RECALL
An advisory against E. coli has been issued following possible contamination
of a beef product produced by Costco Wholesale in Winnipeg. The product
known as Kirkland Signature Lean Ground beef, Item No. 21927 has a pack
date of April 10, 1999, and is sold in packages of approximately 3 kg.
Costco Wholesale is voluntarily recalling this product, and one positive
illness has been reported to date. This health alert apples only to this
product sold at Winnipeg St. James Costco Wholesale warehouse.
[ProMed, April 30, 1999]
USA (FLORIDA) RED TIDE ALERT
A red tide bloom off Collier County coast has left beach goers with itchy
eyes and runny noses. No fish kills have been reported as yet, and the
Department of Environmental Protection has put out an alert.
[ProMed, April 22, 1999]
OTHER
SMALLPOX VIRUS DESTRUCTION DEBATED
The United States is seeking to delay the remaining known stocks of the
smallpox virus based on the possibility of a natural resurgence of the
disease or its use in a terrorist attack. The disease was eradicated in
1980 following a mass vaccination program. In 1996, WHO recommended the
destruction of the remaining known stocks of the virus held by the U.S.
Centers for Disease Control and Prevention and the Russian State Center
of Virology and Biotechnology by June 1999. Some biologists argue that
the genetic code of the virus may be useful for developing new vaccines
against other diseases, while others fear that a stolen sample could prove
to be disastrous in the wrong hands. The United States is expected to
push for a delay at the May meeting of the World Health Assembly. If no
agreement is reached on the matter, the United Stated would have to decide
whether to unilaterally keep its stocks.
[ProMed, April 22,1999]
UK LEGIONELLOSIS FROM TRAVEL TO THAILAND
A cluster of cases of legionnaire's disease have been identified in the
United Kingdom as a result of travel to Thailand. The three individuals
diagnosed with the disease were aged 60 years and above, and stayed at
the same hotel in Bangkok between one to ten days before they became ill.
A cluster alert has been sent to all European Working Group on Legionella
Infections collaborators, the WHO, the Thai Ministry of Health, and a
collaborator in Australia. While investigations in the hotel are in progress,
tour operators from the United Kingdom have been informed and their clients
have been withdrawn until further notice.
[Eurosurveillance Weekly, April 22, 1999]
RUSSIA TB INCIDENCE
The incidence of tuberculosis in Russia has increased by eight percent
this year with more than 2.5 million people suffering from various forms
of tuberculosis. Last year, 108,000 people were diagnosed with the disease.
The Siberian regions account for the bulk of tuberculosis sufferers, and
has been explained by their link to social status and poverty. The risk
of contracting tuberculosis in prison is 50 times higher, where 4,300
out of every 100,000 are afflicted with the disease.
[tbnet, April 22, 1999]
USALINK BETWEEN CHICKEN POX AND FLESHEATING BACTERIA
An infectious disease specialist at Texas Children's Hospital believes
that there is a link between chicken pox and necrotizing fasciitis, as
half of all youngsters who contracted the infection had had chicken pox.
The flesheating bacteria enters the body through breaks in the skin caused
by chicken pox lesions. In the United States, 1,000 cases of the disease
occur annually, 25% involving children. In preventing children from getting
chicken pox, a chickenpox vaccine eliminates a key risk factor for necrotizing
fasciitis. Though the vaccine has been made available since March 1995,
only 25% of U.S. children have received them.
[Reuters, April 28, 1999]
US SAFE HIV VACCINE TESTED
US researchers have successfully tested a new vaccine against HIV that
uses harmless fragments of HIV. The only vaccines that previously showed
any promise were "live vaccines", that were partially disabled and hence
had the potential to mutate and cause infection. The new vaccine was shown
to protect monkeys from extremely virulent strains of the virus during
tests. While the vaccine did not completely prevent infection, it was
contained below the level that could be detected by sensitive tests. This
finding has tremendous implications for extending life expectancy, reducing
transmission in the process.
[Bangkok Post, May 01, 1999]
3. UPDATES FROM PREVIOUS BULLETINS
MALAYSIA CHIKUNGUNYA FEVER
An outbreak of chikungunya fever has affected more than 14 people in the
Kampung Lindungan Tambahan area. The previous outbreak was in the Port
Klang area three months ago.
[The Straits Times, April 27, 1999]
NEW ZEALAND INCREASE IN CRYPTOSPORIDIOSIS
Canterbury has recorded a 10fold increase in the number of cryptosporidiosis
cases this year. 104 cases have been reported this year, compared to only
10 cases last year. 59 cases were reported in the Waimakariri district,
and earlier this year the Kaiapoi aquatic Center was closed for five days
as a result of a cryptosporidiosis scare. The increased incidence has
been attributed to poor personal hygiene rather than any change in standards
by the pools.
[The Press, May 01, 1999]
4.
NOTICES
APEC ISTWG MEETINGS SEATTLE, AUGUST 15㪬
The APEC Working Group on Industrial Science and Technology will meet
in Seattle, August 15㪬. Organizers have planned a seminar for Monday,
August 16, on emerging infections in the region, and a side meeting of
delegates to consider progress under the APEC Initiative on Emerging Infections
(adopted 1997) will be held on Tuesday, August 17. Colleagues in Health
and Science in APEC economies are advised to contact their ISTWG delegation
heads for further information, or to contact Laura Schubert (lschub@u.washington.edu)
for further information.
1ST INTERNATIONAL CONGRESS OF THE ASIA PACIFIC SOCIETY OF INFECTION
CONTROL
The Asia Pacific Society of Infection Control (APSIC) was established
in March 1998 by representatives from 15 countries in the region. In addition
to specialists from the region, a large number of international speakers,
particularly from North America and Europe will be present to meet and
share experiences at the forum. Then main congress will be held between
August 9㪣, 1999. The precongress workshop will be held in Macau on
August 8th. The deadline for abstract submission is April 30th, 1999.
The early registration rate of US$250 is available until May 30th, 1999.
Further information can be obtained from; MV Destination Management Ltd.
Tel: (852) 2735 8118 Fax: (852) 2735 8282 Email:moreview@mvdmc.com
5. HOW TO JOIN THE EMAIL LIST
and receive EINet News Briefs regularly The APEC EINet
listserv was established to enhance collaboration among academicians and public
health professionals in the area of emerging infections surveillance and control.
Subscribers are encouraged to share their own material with their colleagues in
the AsiaPacific Rim. To subscribe (or unsubscribe), please contact Nedra Floyd
Pautler at pautler@u.washington.edu.
Further information about the APEC Emerging Infections Network is available at
http://www.apec.org/infectious. |