Avian Influenza Dr K L Critchley Veterinary Officer - Retired

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Avian Influenza Dr K L Critchley Veterinary Officer - Retired Poultry and Emergency Animal Diseases Primary Industries and Resources SA

Avian Influenza Avian Influenza virus: A member of the orthomyxo viridae family 3 major groups named A, B & C To date, all avian flu has been Type A.

Avian Influenza Avian Influenza on the world scene Within the group A, division is based on the surface H & N antigens 15 Haemagglutinin subtypes and 9 Neuraminidase Virulent avian are usually H5 or H7 but all H and N types have been found in birds. Classic fowl plague is H7N7

Avian Influenza

Avian Influenza

Avian Influenza U.S.: Minnesota, on the ‘flyways’ from the Arctic. In 1960s developed large free range turkey industry and had routine AI outbreaks, virus type same as that carried by migrating waterfowl (up to 60% of young birds infected). Moved the flocks indoors in the 80s and fixed most of the problems. In 1983-4, H5N2 AI outbreak in Pennsylvania, tracked back to live bird markets in New York. Constant monitoring indicates that a low path is still circulating at a low level, with occasional clinical outbreaks.

Avian Influenza

Avian Influenza

Avian Influenza Australia: five outbreaks of virulent AI 1976, Melbourne, H7N7, mixed poultry farms 1985 and 1992 Bendigo, H7N7, duck contact? 1994, Lowood, Qld, H7N3 & using water from river during drought, water fowl contact? 1997, Tamworth, NSW, H7N4, uncertain contact

Avian Influenza Australia: All the outbreaks were controlled fairly quickly. There was no spread outside the affected properties. No consideration was given to AI as a potential zoonotic (animal to human).

Targeted Surveillance

Targeted Surveillance Estimated 2-3% Low Pathogenic AI prevalence Many H types, including: H1, H2, H3, H4, H6, H8, H9, H11, H13 H5 (2 years) H7 (3 years – including 2016)

What can you do?

Who was involved?

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What’s in it?

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This number is the same for all states. Got suspicions? Call the Emergency Disease Watch Hotline 1800 675 888 This number is the same for all states.

Breaking news, AI hits Disney Thank you, any questions?