replication of low pathogenic avian influenza virus in naturally infected mallard ducks (anas platyrhynchos) causes no morphologic lesions.although the mallard (anas platyrhynchos) is considered an important maintenance host for low pathogenic avian influenza (lpai) viruses, viral cell tropism and pathology in naturally infected birds are largely unknown. in august 2006, we collected 19 free-living hatch-year mallards that were positive for lpai virus by real-time reverse-transcriptase polymerase chain reaction (rrt-pcr) in combined oropharyngeal and cloacal swabs. we investigated virus infection and associated lesions in the diges ...201121441193
hematozoa of the anatidae of the atlantic flyway. ii. tthe maritime provinces of canada.the prevalence of hematozoa (diagnosed from blood films) in a sample of 4200 anatids representing 14 species collected in new brunswick, nova scotia and prince edward island during the period 1969-1973 is given. thirty percent of the birds harboured hematozoa; the commonest blood parasite was haemoproteus (parahaemoproteus) nettionis (in 18% of the sample), followed by leucocytozoom simondi (in 14% of the sample). four species of plasmodium occurred in 5% of the sample-plasmodium circumflexum wa ...1975806712
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