Singapore - Outbreak of Old World screwworm (Chrysomya bezziana) in animals in zoo (OIE, January 19, 2018)

[Pathfinder]

Old world screwworm (Chrysomya bezziana), Singapore

Information received on 19/01/2018 from Dr Him Hoo Yap, Chief Veterinary Officer, Director General, Deputy CEO, Regulatory Programmes and Operations, Agri-Food & Veterinary Authority, Singapore, Singapore

Summary Report type Immediate notification (Final report) Date of start of the event 14/08/2017 Date of confirmation of the event 20/12/2017 Report date 19/01/2018 Date submitted to OIE 19/01/2018 Date event resolved 17/01/2018 Reason for notification First occurrence of a listed disease in the country Causal agent Old world screwworm (Chrysomya bezziana) Nature of diagnosis Clinical, Laboratory (basic) This event pertains to the whole country

New outbreaks (1)

Outbreak 1 Singapore Zoo, SINGAPORE Date of start of the outbreak 14/08/2017 Outbreak status Resolved (17/01/2018) Epidemiological unit Zoo Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Sambar:Cervus unicolor(Cervidae) 16000 8 0 2 0 Affected population Maggot larvae had been observed to be infesting the wounds of a variety of species. Samples of maggot larvae were obtained from live sambar (Rusa unicolor or Cervus unicolor) exhibiting signs of infestation. There are 16,000 susceptible animals at the Singapore zoo.

Summary of outbreaks Total outbreaks: 1 Total animals affected Species Susceptible Cases Deaths Killed and disposed of Slaughtered Sambar:Cervus unicolor(Cervidae) 16000 8 0 2 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Sambar:Cervus unicolor(Cervidae) 0.05% 0.00% 0.00% 0.01% *Removed from the susceptible population through death, destruction and/or slaughter

Epidemiology Source of the outbreak(s) or origin of infection Vectors Epidemiological comments No cases have been detected in livestock farms. The detection of Old World screwworm based on morphological examination has also been supported by third party laboratory examination on 20th December 2017.

Control measures Measures applied Quarantine Official disposal of carcasses, by-products and waste Disinfection Ante and post-mortem inspections Vaccination permitted (if a vaccine exists) Treatment of affected animals (Wound is cleaned and larvicide applied. Wounds are monitored.) Measures to be applied Surveillance within containment and/or protection zone Disinfestation Control of vectors

Diagnostic test results Laboratory name and type Species Test Test date Result Animal Health Laboratory (National laboratory) Sambar parasitological examination 20/12/2017 Positive

Future Reporting The event is resolved. No more reports will be submitted.

...

http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=25466