Occurrence of Hsw 1 N 1 subtype influenza A viruses in wild ducks in Europe.
Two identical strains of influenza A viruses antigenically related to swine influenza  (Hsw 1 N 1) have been isolated from adult mallard ducks (Anas platyrhynchos) in Southern Germany. They were designated A/Duck/Bavaria/1/77 and A/Duck/Bavaria/2/77. Serologic tests revealed a close antigenic relationship to the strain A/Duck/Alberta/35/76. Experimental infections of piglets with strain A/Duck/Bavaria/1/77 demonstrated the susceptibility of swine to this virus strain. The virus was isolated from nasal swabs of infected piglets up to 8 days p. inf. and from contact animals up to 9 days. No seroconversion was detected during an observation period of 30 days.
D000818:Animals; D000956:Antigens, Viral / Q000032:analysis; D004372:Ducks / Q000382:microbiology*; D005260:Female; D005860:Germany, West; D006389:Hemagglutinins, Viral / Q000032:analysis; D009980:Influenza A virus / Q000254:growth & development / Q000276:immunology* / Q000302:isolation & purification*; D008297:Male; D009439:Neuraminidase / Q000276:immunology; D009976:Orthomyxoviridae Infections / Q000662:veterinary; D013552:Swine / Q000382:microbiology; D013553:Swine Diseases / Q000382:microbiology
D000956:Antigens, Viral; D006389:Hemagglutinins, Viral; D009439:Neuraminidase