Iwanaga M, Imai N, Kamikawa A, Shimada K, Okura M, Takamatsu D, Ueda D, Nakayama M, Shibahara T. Suppurative meningoencephalitis and perineuritis caused by Streptococcus gallolyticus in a Japanese Black calf.
J Vet Med Sci 2021;
84:53-58. [PMID:
34819412 PMCID:
PMC8810337 DOI:
10.1292/jvms.21-0518]
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Abstract
A 179-day-old calf, which was weak and stunted, showed neurological signs and was euthanized. Postmortem examination revealed extensive and severe cloudy area in the meninges, and pleural
pneumonia. Gram-positive cocci were isolated from systemic organs. Biochemical and 16S rRNA gene sequence analyses identified the isolate as Streptococcus gallolyticus, and
its subspecies was suggested to be gallolyticus (SGG). The isolate was classified as a novel sequence type (ST115) by the multilocus sequence typing scheme for SGG and
showed susceptibility to penicillin, ampicillin, amoxicillin, florfenicol, sulfamethoxazole-trimethoprim, and chloramphenicol. Histopathologically, suppurative meningoencephalitis and
perineuritis were detected. As SGG has been isolated solely from a cow with mastitis in Japan, this is the first SGG infection in a calf with suppurative meningoencephalitis and perineuritis
in this country.
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