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  • Title: Comparison of methods to diagnose an epizootic of Corynebacterium kutscheri pneumonia in rats.
    Author: Fox JG, Niemi SM, Ackerman J, Murphy JC.
    Journal: Lab Anim Sci; 1987 Feb; 37(1):72-5. PubMed ID: 3586609.
    Abstract:
    An outbreak of Corynebacterium kutscheri pneumonia occurred in a colony of laboratory rats. Diagnostic methods compared on a prospective basis included (1) an enzyme-linked immunosorbent assay (ELISA) for serum antibody to C. kutscheri; (2) C. kutscheri isolation from retrograde nasal wash, cervical lymph nodes, tracheal wash, lung homogenate; and (3) histopathology. C. kutscheri was isolated from one or more of the cultured sites from suspected cases, but no individual rat yielded C. kutscheri from all of the sites. The presence of histological lung lesions was the most frequent indicator of infection (8 of 9 suspected cases), followed by isolation of C. kutscheri from lung homogenate (5 of 6), ELISA for serum antibody (6 of 8), and isolation of C. kutscheri from cervical lymph node (4 of 8). Isolation of C. kutscheri from nasal wash (1 of 9) was the least sensitive indicator of infection. ELISA antibody was not detected in rats which had normal lungs and did not harbor C. kutscheri. It was concluded that ELISA provides noninvasive means for detecting infection and cervical lymph node culture increase the potential for successful isolation of the agent in C. kutscheri infected rats.
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