RESUMO
This report describes a case of visceral leishmaniasis characterized by adrenalitis with intralesional Leishmania sp. amastigotes in a 16 year-old maned wolf (Chrysocyon brachyurus). The animal had been previously diagnosed as infected with Leishmania infantum by serology and xenodiagnosis. The only organ in which amastigotes were detected by histopathology and immunohistochemistry was the adrenal gland, which presented multifocal infiltration of lymphocytes, plasma cells and macrophages containing intracytoplasmic amastigotes. The animal had no other lesions of visceral leishmaniasis, except for renal and splenic amyloidosis and pancreatitis that may be associated with the disease. Importantly, the maned wolf had an intratubular seminoma in the testis, which to the best of our knowledge is the first reported case of testicular tumor in this species.
Assuntos
Animais , Canidae , Leishmania/patogenicidade , Leishmaniose Visceral/veterinária , Amiloidose/veterinária , Ensaio de Imunoadsorção Enzimática/veterinária , Imuno-Histoquímica/veterinária , Seminoma/veterináriaRESUMO
This report describes a case of visceral leishmaniasis characterized by adrenalitis with intralesional Leishmania sp. amastigotes in a 16 year-old maned wolf (Chrysocyon brachyurus). The animal had been previously diagnosed as infected with Leishmania infantum by serology and xenodiagnosis. The only organ in which amastigotes were detected by histopathology and immunohistochemistry was the adrenal gland, which presented multifocal infiltration of lymphocytes, plasma cells and macrophages containing intracytoplasmic amastigotes. The animal had no other lesions of visceral leishmaniasis, except for renal and splenic amyloidosis and pancreatitis that may be associated with the disease. Importantly, the maned wolf had an intratubular seminoma in the testis, which to the best of our knowledge is the first reported case of testicular tumor in this species.(AU)
Assuntos
Animais , Leishmaniose Visceral/veterinária , Leishmania/patogenicidade , Canidae , Imuno-Histoquímica/veterinária , Amiloidose/veterinária , Ensaio de Imunoadsorção Enzimática/veterinária , Seminoma/veterináriaRESUMO
This study aimed to evaluate protection induced by the vaccine candidate B. ovis ΔabcBA against experimental challenge with wild type B. ovis in rams. Rams were subcutaneously immunized with B. ovis ΔabcBA encapsulated with sterile alginate or with the non encapsulated vaccine strain. Serum, urine, and semen samples were collected during two months after immunization. The rams were then challenged with wild type B. ovis (ATCC25840), and the results were compared to non immunized and experimentally challenged rams. Immunization, particularly with encapsulated B. ovis ΔabcBA, prevented infection, secretion of wild type B. ovis in the semen and urine, shedding of neutrophils in the semen, and the development of clinical changes, gross and microscopic lesions induced by the wild type B. ovis reference strain. Collectively, our data indicates that the B. ovis ΔabcBA strain is an exceptionally good vaccine strain for preventing brucellosis caused by B. ovis infection in rams.