[Tuberculosis lymphadenitis in slaughtered swine from the State of São Paulo, Brazil: microscopic histopathology and demonstration of mycobacteria].
BACKGROUND
As the occurrence of tuberculosis lymphadenitis in swine constitutes a public health risk, especially in immunosuppressed individuals, the distribution of tuberculoid lesions and the presence of microbacteria in lymph nodes and hepatic and muscular tissue in swine for slaughter, in the State of S. Paulo, SP (Brazil), in the period from 1993 to 1994, were studied. MATERIAL E METHOD: Tuberculous lesions in 60 carcasses of swine, slaughtered at abattoirs during the period 1993-1994, were studied. When macroscopic lesions were observed, a representative sampling of lymph nodes, hepatic and muscular tissues (masseter and diaphragm) were examined using histopathological and microbacterial isolation techniques.


RESULTS
The macroscopic lesions were found predominantly in mesenteric lymph nodes. The MAI Complex (M.avium-intracellulare) was isolated mainly in the carcass group that showed lesions and was not found in the control group. Microorganisms of the MAI Complex were not isolated from hepatic and muscular tissues.


CONCLUSIONS
No clear relationship between the type of mycobacteria isolated and the macroscopic lesions observed during the carcass inspection was found.
Balian
S C
SC
Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo (FMVZ/USP), Brasil. balian@usp.br
Ribeiro
P
P
Vasconcellos
S A
SA
Pinheiro
S R
SR
Ferreira Neto
J S
JS
Guerra
J L
JL
Xavier
J G
JG
Morais
Z M
ZM
Telles
M A
MA
D000818:Animals; D001938:Brazil; D016009:Chi-Square Distribution; D009162:Mycobacterium avium / Q000302:isolation & purification; D013552:Swine; D013553:Swine Diseases / Q000382:microbiology / Q000473:pathology*; D014388:Tuberculosis, Lymph Node / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*
Linfadenites tuberculóides em suínos abatidos no estado de São Paulo, Brasil: aspectos macroscópicos histopatológicos e pesquisa de micobactérias.