适宜
发表于 2025-3-25 04:17:58
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拔出
发表于 2025-3-25 08:54:08
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谦卑
发表于 2025-3-25 13:24:12
Origins of Canine Parvovirus,ased upon CPV arising as a variant of a pre-existing parvovirus that has adapted to canines, either under field conditions or as a result of the selective pressure of attenuation, such as in the production of live vaccines. These hypotheses include:
飞镖
发表于 2025-3-25 17:04:32
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kindred
发表于 2025-3-25 23:41:18
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achlorhydria
发表于 2025-3-26 02:37:02
Transmission,shes) and by insects, notably flies. In the past this means of transmission may have been particularly significant at dog shows and in kennels where large numbers of dogs were gathered together. It must have contributed significantly to the high mortality rates recorded for young pups in the origina
Encoding
发表于 2025-3-26 07:05:45
Linjiao Luo,Quan Wen,Aravinthan D. T. Samuelshes) and by insects, notably flies. In the past this means of transmission may have been particularly significant at dog shows and in kennels where large numbers of dogs were gathered together. It must have contributed significantly to the high mortality rates recorded for young pups in the origina
panorama
发表于 2025-3-26 11:44:13
Introduction,opulations of all ages. Within a few months this virus had crossed national and continental boundaries. It passed through quarantine barriers, causing many fatalities, at first in animals in breeding and boarding kennels, puppy farms and research facilities, later spreading to home-based dogs. By 19
dithiolethione
发表于 2025-3-26 16:07:55
Canine Parvovirus Disease Syndromes,y described as a non-suppurative myocarditis. A third manifestation, generalised necrotizing vasculitis, is occasionally diagnosed in puppies (Johnson and Castro 1984). With the pig parvovirus (PPV) and some other parvoviruses, infection of breeding stocks can lead to a further syndrome resulting in
脆弱吧
发表于 2025-3-26 17:52:40
Transmission,les are shed per gram of faeces (Pollock 1982), and these may be passed 2–3 days post-infection, before symptoms become apparent (see Fig. 3). The minimum infectious dose for wild strains of CPV is unclear, although experience with an attenuated strain suggests that it may be a very small dose, sinc