Titlebook: Diseases of Wild Waterfowl; Gary A. Wobeser Book 1997Latest edition Springer Science+Business Media New York 1997 Metazoa.Plasma.Viruses.c

与野兽博斗者

Coccidia and Other Protozoaycle in which sexual stages and oocyst formation occurs in the intestine of one host (usually a carnivore) and asexual stages occur in other tissues of another host. Waterfowl are infected with asexual stages of at least two genera, . and ., from this family.

Capitulate

Lead and Other Metalsing of waterfowl was recognized as early as 1874 (Phillips and Lincoln, 1930) and has been recorded in at least 21 countries (Pain, 1992b) but the impact of lead on waterfowl populations is still understood imperfectly. The ecotoxicology of lead has been reviewed in detail by Pain (1995).

慢跑鞋

讨好美人

熄灭

TIA742

malign

Other Virusesiod, although mortality of ducklings and goslings is known to be high; some of these viruses might be occurring in young birds without being detected. Conditions of confinement may also be particularly favourable for these agents, so that the prevalence may be much greater among domestic birds than in wild waterfowl.

Commodious

步履蹒跚

Duck Plague23), although it was mistakenly diagnosed as fowl plague (an influenza A virus infection) at the time (Jansen, 1961). The virus was isolated and the name Duck Plague was proposed by Jansen and Kunst (1949). DP has since been diagnosed in many countries of Europe and Asia (Suwatviroj .., 1977; Spieke

TIA742

Avian Influenza, Newcastle Disease, and Other Paramyxovirusesiseases. Both viruses occur commonly in wild waterfowl; are hemagglutinating and are isolated by the same techniques, so that isolants must be differentiated; have a broad avian host range and are important pathogens of domestic poultry; and occur in a continuum from inapparent infection to acute fa