ResumoO objetivo deste trabalho foi demonstrar a associação entre lesões renais microscópicas e a presença de anticorpos contra Leptospira spp em suínos aparentemente sadios, abatidos em frigorífico da região norte do Estado do Paraná. Foram colhidas amostras de rim e coágulo sanguíneo de 120 animais com lesões renais macroscópicas tipo white spots e de 120 sem lesões renais macroscópicas tipo white spots, utilizados como controle. As amostras de soro foram submetidas à prova de soroaglutinação microscópica (SAM) e as amostras de rim, ao exame histopatológico corado pela Hematoxilina-Eosina (HE). Embora nenhuma associação (p=0,27) entre as lesões renais macroscópicas tipo white spots e a presença de anticorpos contra Leptospira spp tenha sido observada, verificou-se uma significativa associação (p=0,015) entre a nefrite intersticial e a soropositividade para leptospirose. Palavras-chave: Leptospirose, rim, lesão white spots, sorologia, histopatologia AbstractThe aim of this work was to demonstrate the association between microscopic kidney´s lesions and presence of antibodies against Leptospira spp in apparently healthy swine from slaughterhouses located in northern Paraná State. Samples of kidney and blood coagulum were collected from 120 animals with macroscopic kidney´s lesions type white spots and from120 animals without macroscopic lesions, used as control. Samples of serum, were submitted to microscopic agglutination test (MAT) and samples of kidney for histopathological evaluation stained with Hematoxylin and Eosin (HE). Although no association (p=0,27) between macroscopic kidney's lesions type white spots and presence of antibodies against Leptospira spp has been observed, there was a significant association (p=0,015) between interstitial nephritis and seropositivity to leptospirosis.

Chlamydophila abortus (C. abortus) is associated with reproductive problems in cattle, sheep, and goats. Diagnosis of C. abortus using embryonated chicken eggs or immortalized cell lines has a very low sensitivity. Polymerase chain reaction (PCR) assays have been used to detect C. abortus infection in clinical specimens

Chlamydophila abortus (C. abortus)

The aim of this paper was to estimate the prevalence of antibodies to Chlamydophila abortus in ewes from the Londrina region of Paraná state. Blood samples from 267 adult ewes from eight herds were submitted to complement fixation testing. Tests were considered positive when the titers ≥ 32. Nineteen animals (7.11%) in 7 (87.50%) herds tested positive for antibodies against C. abortus. The titers were 32 in 17 animals and were 64 and 128 in the other two animals. The clinical signs recorded were abortion, stillbirth, weak newborns and heat repetition. The high frequency of herds with at least one positive animal and a seroprevalence of 7.11% suggest the presence of Chlamydophila abortus in the animals of studied herds.