Comparison of strain susceptibility to experimental ...



Title Comparison of strain susceptibility to experimental sialodacryoadenitis in rats
Author(s) D. H. Percy, Paul E. Hanna, F. Paturzo, P. N. Bhatt
Journal Laboratory Animal Science
Date 1984
Volume 34
Issue 3
Start page 255
End page 260
Abstract Wistar, Sprague-Dawley, and Long-Evans outbred rats, and the Fischer344 inbred strain were inoculated intranasally with 10superscript 3 TCID50 of sialodacryoadenitis virus at approximately 9 weeks of age. Paired animals were killed at 2-day intervals after inoculation up to 2 weeks, then at 20 days. A comparison of strain susceptibility to sialodacryoadenitis virus was made using the following criteria: histopathology, immunofluorescent microscopy, serology and serum amylase activity. All four strains were susceptible to sialodacryoadenitis virus. The disease was frequently subclinical, although typical lesions were observed on histopathological examination. Focal bronchitis, bronchiolitis and pneumonitis were observed histologically during the acute stages of the disease. Viral antigen was readily demonstrated by immunohistochemical tests in salivary and lacrimal glands during the early stages of the disease. A rise in serum amylase was observed, and it was correlated with the first appearance of lesions in the salivary glands. The appearance of detectable antibody to sialodacryoadenitis virus, and the rate of viral clearance from infected glands showed that the course of the disease was similar in the four strains studied..

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