Diagnosis, Surveillance and Management of Streptococcus equi subspecies zooepidemicus Infections in Chinchillas (Chinchilla lanigera)
Autor: | Jori K Leszczynski, Charles E. Wiedmeyer, Daniel J. Tollin, Christopher A Manuel, Lauren M Habenicht, Michael K Fink, Cara M Mitchell, Susan Tousey, Linda K. Johnson, Derek L Fong, Umarani Pugazhenthi, Marcus J Crim |
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Rok vydání: | 2020 |
Předmět: |
Bacterial Zoonoses
Streptococcus equi 040301 veterinary sciences Prevalence Physiology General Biochemistry Genetics and Molecular Biology Rodent Diseases 0403 veterinary science Case Studies Monocytosis Chinchilla Streptococcal Infections medicine Animals Endocarditis Prospective Studies Leukocytosis General Veterinary business.industry Osteomyelitis 04 agricultural and veterinary sciences medicine.disease Female Septic arthritis medicine.symptom business Meningitis |
Zdroj: | Comp Med |
ISSN: | 1532-0820 |
Popis: | During a 6-mo period, two 5-6 mo old female chinchillas (Chinchilla lanigera) were examined at the University of Colorado Anschutz Medical Campus after the discovery of firm, nonmobile masses in the left ventral cervical and left axillary region. Other than these findings and mild weight loss, both chinchillas' physical exams were normal. Bloodwork revealed an inflammatory leukogram characterized by leukocytosis, toxic neutrophils, lymphopenia, and monocytosis with mild, nonregenerative anemia. At necropsy, both masses were identified as abscesses. Streptococcus equi, subspecies zooepidemicus (S. zooepidemicus) was isolated in pure culture. Histology of the lungs, liver, spleen, and kidneys showed a marked increase in the numbers of both polymorphonuclear leukocytes and lymphocytes. Both animals were deemed unsuitable for research and were euthanized under isoflurane anesthesia by an intracardiac injection of pentobarbital sodium solution. S. zooepidemicus is an opportunistic, commensal organism found in the upper respiratory tract of horses. This organism has been documented to cause disease in other species and is zoonotic. Infections in humans have been reported, resulting in glomerulonephritis, endocarditis, septic arthritis, osteomyelitis, meningitis, and death. To aid in diagnosis and prospective surveillance of this bacteria, oral and nasal swabs were collected from the remaining cohort of chinchillas, and a qPCR screening assay was implemented. Within 12 mo, 4 of 41 additional females tested positive by culture or qPCR, resulting in a disease prevalence of 14% (6 of 43). However, only 2 of the additional 4 S. zooepidemicus positive animals developed clinical signs. The potential for the spread of infection, zoonosis, and adverse effects on research demonstrate that surveillance for S. zooepidemicus should be considered in a biomedical research environment. |
Databáze: | OpenAIRE |
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