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  • Title: Influence of bacteria on Clostridium perfringens infections in young chickens.
    Author: Fukata T, Hadate Y, Baba E, Arakawa A.
    Journal: Avian Dis; 1991; 35(1):224-7. PubMed ID: 1903033.
    Abstract:
    When monoflora chickens with Lactobacillus acidophilus or Streptococcus faecalis were inoculated with Clostridium perfringens either in broth culture or resuspended in Gifu anaerobic medium broth or supernatant fluid, few or no chickens died. Approximately 50% of germ-free chickens died after inoculation of C. perfringens culture, whereas no conventional birds died after inoculation of broth culture. C. perfringens in the contents of duodenum from germ-free chickens numbered about 10(4) colony-forming units (CFU)/g after inoculation 10(8) CFU broth culture per bird, but in gnotobiotic and conventional chickens this organism decreased or was not detected. When C. perfringens was cultured in intestinal contents collected from germ-free chickens, C. perfringens proliferated but alpha toxin was not detected. These findings indicate that the pathogenicity of C. perfringens was suppressed by L. acidophilus or S. faecalis administered previously or inhibited by normal intestinal flora.
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