Vesicular karyomegaly of the liver hepatocytes is described from Baryancistrus sp. (Loricaridae), in 3 out of 7 fish, collected from Rio Xingu in central Amazonian (neutral water) Brazil and kept about 2 wk in a holding facility fed with acid water (pH 5.0 to 5.5). Altered cells also occurred in the gill epithelium. The vesicles in the liver were shown to contain a periodic acid-Schiff (PAS)-po...

Abbreviations: AIDS, acquired immune deficiency syndrome; ARDS, adult respiratory distress syndrome; BAL, bronchoalveolar lavage; CSF, cerebrospinal fluid; CMV, cytomegalovirus; CNS, central nervous system; CT, computed tomography; DNA, deoxyribonucleic acid; EIA, enzyme immunoassay; GMS, Grocott methenamine-silver; HIV, human immunodeficiency virus; HPLC, high performance liquid chromatography...

Histopathological study showed pseudoepitheliomatous hyperplasia of the epidermis and there was a granulomatous inflammatory infiltrate in the dermis composed of histiocytes, eosinophils, and polymorphonuclear cells. Globular structures with a thick, pigmented wall were seen scattered between the inflammatory cells, some of them arranged in the form of a rosary. These structures stained with pe...

Pulmonary alveolar proteinosis (PAP) is a rare pulmonary disease. Diagnosis is established by bronchoalveolar lavage (BAL), which has macroscopic 'milky appearance', and in the presence of typical computed tomography, findings are diagnostic of PAP but, however, the feature of periodic acid-Schiff-positive eosinophilic proteinaceous fluid raises the confidence of the diagnosis. We report late-o...

Due to increasing numbers of patients with documented infections with Cryptosporidium and other coccidia, it is important for the physician and clinical laboratory to be aware of the appropriate diagnostic techniques necessary for organism recovery and identification. Although Cryptosporidium is found in the gastrointestinal tract, tissue biopsies may be insufficient for organism recovery; the ...

An adult female budgerigar (Melopsittacus undulatus) presented with abdominal enlargement. The condition of the bird deteriorated after needle aspiration for cytological examination. The budgerigar was euthanatized and a complete necropsy was performed. Microscopic sections were prepared and stained with hematoxylin and eosin, Gram staining, periodic acid-Schiff (PAS) and acid-fast staining. Es...