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  • Title: Pasteurella multocida in psittacines: prevalence, pathology, and characterization of isolates.
    Author: Morishita TY, Lowenstine LJ, Hirsh DC, Brooks DL.
    Journal: Avian Dis; 1996; 40(4):900-7. PubMed ID: 8980823.
    Abstract:
    Although the pathogenicity of Pasteurella multocida for psittacines (parrots and their relatives) has been documented in several case reports, the associated pathologic syndromes have not been well defined nor have the isolates been characterized. In addition, the prevalence of P. multocida in psittacines has not been determined. Three hundred twenty-eight psittacines (253 clinically healthy and 75 clinically ill) were cultured for P. multocida. Pasteurella multocida was not isolated from the pharynx, choana, or cloaca of psittacines. However, in five dead psittacines submitted for necropsy, P. multocida was isolated. These isolates were characterized, and all belonged to either somatic serotype 3 or 4,7. Pasteurella multocida somatic serotype 3 was isolated from psittacines with septicemia, whereas P. multocida somatic serotype 4,7 was isolated from psittacines with cutaneous lesions. The majority (four out of five) of the P. multocida isolates belonged to the subspecies multocida, and all isolates were susceptible to penicillin G, sulfisoxazole, gentamicin, erythromycin, tetracycline, and trimethoprim-sulfamethoxazole but resistant to streptomycin. DNA fingerprints demonstrated that isolates belonging to the same somatic serotype were genetically related. The isolate from a cockatiel that had been caught by a cat belonged to somatic serotype 3 and was not genetically related to the other two isolates belonging to this somatic serotype.
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