Outbreaks of fowl cholera in Muscovy ducks (Cairina moschata) on a farm in Aomori Prefecture.
Outbreaks of a subacute disease characterized by lameness, corneal turbidity, dysstasia and depression occurred in Muscovy ducks (Cairina moschata) on a farm in Aomori Prefecture in February and May 1991. Nine strains of Pasteurella multocida were isolated from 5 to 6 dead ducks, and 4 of 8 ducks with clinical signs. Serotypes of the isolates were identified as Heddleston's serotype 1, 10 or 12 and Namioka's serotypes 5:A, 8:A, 9:A or 9:UT. These isolates were highly susceptible to 12 antibiotics, although, some of them were considerably resistant to chloramphenicol. Mouse LD50 values of the 9 isolates ranged from 10(1.0) to 10(5.3). The most virulent strain for the mouse killed 2 to 4 ducks when inoculated intramuscularly at a concentration of 10(3.3). This is the first report of outbreaks of fowl cholera in Muscovy ducks infected with various serotypes strains of P. multocida in Japan.
Takahashi
S
S
Department of Veterinary Microbiology, School of Veterinary Medicine and Animal Sciences, Kitasato University, Aomori, Japan.
Sato
H
H
Yamada
T
T
Takenouchi
T
T
Sawada
T
T
Nakano
K
K
Saito
H
H
D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D004196:Disease Outbreaks; D004372:Ducks; D005123:Eye / Q000382:microbiology / Q000473:pathology; D005260:Female; D006321:Heart / Q000382:microbiology; D007564:Japan / Q000453:epidemiology; D007596:Joints / Q000382:microbiology / Q000473:pathology; D007668:Kidney / Q000382:microbiology / Q000473:pathology; D008099:Liver / Q000382:microbiology / Q000473:pathology; D008168:Lung / Q000382:microbiology / Q000473:pathology; D051379:Mice; D008815:Mice, Inbred Strains; D008826:Microbial Sensitivity Tests; D009206:Myocardium / Q000473:pathology; D010326:Pasteurella Infections / Q000453:epidemiology / Q000401:mortality / Q000662:veterinary*; D016979:Pasteurella multocida / Q000187:drug effects / Q000302:isolation & purification; D011201:Poultry Diseases / Q000453:epidemiology*; D012703:Serotyping; D013154:Spleen / Q000382:microbiology / Q000473:pathology; D014774:Virulence
D000900:Anti-Bacterial Agents