Diagnóstico de pseudotuberculosis en ovinos patagónicos / Diagnosis of caseous lymphadenitis in sheep from Patagonia
Rev. argent. microbiol
;
39(1): 44-46, ene.-mar. 2007.
Article
in Spanish
| LILACS
| ID: lil-634540
RESUMEN
La linfadenitis caseosa (LAC) es una enfermedad bacteriana supurativa crónica que afecta a ovinos. El agente etiológico es Corynebacterium pseudotuberculosis. El diagnóstico diferencial con otras afecciones que presentan manifestaciones clínicas similares sólo puede hacerse sobre la base del aislamiento y la identificación del agente etiológico. El objetivo de este trabajo fue caracterizar metabólica y genéticamente al agente causal de abscesos granulomatosos observados en ovinos en la región patagónica. En las muestras, se observó un contenido caseoso rodeado de una membrana fibrosa, y en el examen histopatológico, un centro de necrosis caseosa rodeado por células epitelioides, linfocitos y polinucleares. Mediante estudios microscópicos, bacteriológicos y moleculares fue confirmada la infección causada por C. pseudotuberculosis biovar ovis.
ABSTRACT
Caseous lymphadenitis (CLA) is a chronic bacterial, infectious and contagious disease caused by Corynebacterium pseudotuberculosis. It affects sheep and results in abscesses of the lymph nodes in subcutaneous tissue, as well as in internal organs such as lungs, liver and kidneys. Differential diagnosis of the disease is based on the isolation and biochemical identification of the etiological agent. The purpose of this study was to characterize the bacteria isolated from typical CLA lesions in sheep from Patagonia, Argentina, at metabolic and genetic levels. Macroscopic observations show a fibrous membrane containing caseous necrotic tissue. Histopathological analysis shows an eosinophilic necrotic area surrounded by epitheloid cells and polymorphonuclear infiltration. Other analyses performed such as microscopic observations, in vitro culture, biochemical tests and 16s rDNA sequencing confirmed diagnosis of caseous lymphadenitis due to C. pseudotuberculosis.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Sheep Diseases
/
Corynebacterium pseudotuberculosis
/
Corynebacterium Infections
Type of study:
Diagnostic study
/
Prognostic study
Limits:
Animals
Country/Region as subject:
South America
/
Argentina
Language:
Spanish
Journal:
Rev. argent. microbiol
Journal subject:
Microbiology
Year:
2007
Type:
Article
Affiliation country:
Argentina
Institution/Affiliation country:
Secretaría de Salud de la Provincia de Chubut/AR
/
Universidad Nacional de la Patagonia San Juan Bosco/AR
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