Rafał Sapierzyński

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Beak and feather disease virus- (BFDV-) positive (naturally infected) but clinically healthy budgerigars (Melopsittacus undulatus) were inoculated with two isolates of Mycobacterium avium subsp. avium isolated from naturally infected golden pheasant (Chrysolophus pictus) and peafowl (Pavo cristatus). During a period of more than two months after(More)
The aim of the present study was a description of several microfilaremia cases diagnosed in dogs from Poland. The study was conducted on cytological samples of pathologic masses and peripheral blood smears taken for diagnostic purposes from dogs showing a various clinical findings. The presence of the parasites in tissue samples was observed in 8 dogs,(More)
Apoptosis is an important process involved in pathogenesis and progression of neoplasia. However, it has been not so far extensively investigated in canine mammary tumors (CMTs). Therefore the aim of our study was to determine Bcl-2, Bax, cleaved caspase-3 (CC3) and p53 expression in CMTs and evaluate their correlation with host/tumor factors, and overall(More)
The aim of this study was to evaluate the utility of immunocytochemistry in a standard veterinary practice and to determine the immunophenotype of tumor cells in cases of multicentric lymphoma in dogs by immunocytochemical analysis of fine-needle biopsy specimens. The study was performed on cytological samples collected from 54 dogs, in which multicentric(More)
Lymphadenomegaly is the enlargement of the lymph node/nodes, due to various nonneoplastic or neoplastic processes, observed mainly in dogs, rarely in other animal species. The first step of a diagnostic procedure in cases of lymph nodes enlargement, apart from physical examination and morphological blood analysis, should be a cytological examination of an(More)
Malignant lymphoma is one of the most common malignant tumours occurring in dogs. Fine needle aspiration biopsy (FNAB) is an excellent, specific diagnostic procedure used to assess pathological processes in lymph nodes. The aim of the present study was to conduct a cytopathological analysis of lymphoma in dogs and to analyse some epidemic aspects of(More)
The aim of this study was the evaluation of the occurrence of Helicobacter-like organisms in the gastric mucosa of dogs. The study was performed on samples of gastric mucosa obtained during necropsies from 94 dogs euthanasized for various reasons. Histopathological examination and also urease test was performed. Helicobacter sp. was found in 85.10% of(More)
Histiocytic sarcoma is a malignant neoplastic proliferation of atypical histiocytes with tendency to spread, characterized by fast progression to disseminated form--disseminated histiocytic sarcoma. Cytopathology is a low, invasive, cheap, and quick method of diagnosis commonly used in veterinary oncology. The aim of the presented study was description of(More)
The aim of this study was the evaluation of gastric epithelial cell proliferation rate in connection with the gastric Helicobacter-like organisms (GHLO) infection in dogs. The study was performed on samples of the gastric mucosa obtained during necropsies from 60 dogs euthanasized for various reasons. Microscopic preparations were stained with the(More)
Cytomorphometry made on cytological slides is the quantitative method of precise analysis of cellular structures, including both cytoplasm and nucleus. The aim of this study was to describe cytomorphometric parameters of mesothelial cells in the course of benign reactive and malignant proliferation and to compare them to carcinomas and adenocarcinomas(More)