| Summary |
The purposes of the study were to identify the microorganisms carried by migratory birds and to evaluate the impact of these microorganisms to poultry industry. In virus aspect, a total of 1,820 of fecal samples from wild birds were examined. Fifteen strains of AI viruses were isolated and as H1N1, H2N7, H3N8, H4N6, H7N3, and H10N8 serotypes were identified. Four strains of paramyxovirus and one strain of PMV1 (NDV) were isolated. Fortunately, all of these strains were low or none pathogenic. In bacterial aspect, type C botulism, one of the major causes of death of wild birds in Taiwan, was confirmed in three cases. In parasite aspect, one coccidian, three nematodes (Porrocaecum sp. Strongyloides sp. Capillaria sp.), one throny-headed worm (Echinorhynchus sp.) were recognized. However, all the parasites found in migration birds exist in domestic birds. It is worthy of exploring that cpuld the parasites be possibly transmited each other? In conclusion, the microorganisms isolated from migratory birds were low or none pathogenic to domestic poultry in Taiwan. In the view of epidemiology of AIV, summer visitors of migratory birds might have higher probability to carry pathogens, so it could not be excluded that the probability of migratory birds carrying high pathogens next year. Therefore, it is necessary to continue the surveillance program for migratory birds.
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