Pathogenicity of an “<I>Actinobacillus salpingitidis</I>”/avian <I>Pasteurella haemolytica</I>-like Organism for Laying Hens

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  • 産卵鶏に対する“<I>Actinobacillus salpingitidis</I>”/avian <I>Pasteurella haemolytica</I>様菌の病原性
  • 産卵鶏に対する"Actinobacillus salpingitidis"/avian Pasteurella haemolytica様菌の病原性
  • サンランケイ ニ タイスル Actinobacillus salpingiti
  • Pathogenicity of an ^|^ldquo;Actinobacillus salpingitidis^|^rdquo;/avian Pasteurella haemolytica-like Organism for Laying Hens

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Abstract

Ten laying hens 560 days of age were inoculated intraperitoneally with 2.7 or 13.5×108 colony forming units (CFU) of an “Actinobacillus salpingitidis”/avian Pasteurella haemolytica-like organism. Four of 5 birds inoculated died 3 days after inoculation of 13.5×108 CFU and all 5 birds survived for 13 days after inoculation of 2.7×108 CFU. Soft shell eggs were produced 2 to 4 days after inoculation and egg production was declined. At postmortem examination the peritoneum showed cloudy swelling, the ovarian follicles were hemorrhagic, and the uterine folds of the oviduct were edematous. Microscopy revealed mild inflamatory exudate with bacterial colonies in the abdominal serosa, focal necrosis in the hepatic lobules and lamina propria of the infundibulum and ovarian parenchyma and rarefaction of the splenic pericapillary sheath. The inoculated organism was recovered from the brain, trachea, lung, heart, liver, spleen, kidney, ovary and oviduct of some cases.

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