Where are we with Polish pathology at the turn of the centuries in the light of the Congresses of the Polish Society of Pathologists?

The aim of this study is to depict the current and past research directions in Polish pathology at the turn of the centuries. The analysis was based on the abstracts of the congresses of the Polish Society of Pathologists organized in 1992-2016 and concerned 1,824 presentations. It has been proven that oncology (1,090 presentations, 59.76%) was the most commonly discussed topic and dominated the dispute. Organ pathology was the area of research covered with over » of all papers (464 presentations, 25.44%), while subsequent topics played a marginal role: varia (86 presentations, 4.71%), infectious and parasitic diseases (84 presentations, 4.61%) and toxicopathology (56 presentations, 3.07%). A special, multidisciplinary category of veterinary pathology was particularized (44 presentations, 2.41%). Positive trend was revealed for oncology, while a downward one for the organ pathology, toxicopathology as well as pathology of infectious and parasitic diseases.

Gills as morphological biomarkers in extensive and intensive rainbow trout (Oncorhynchus mykiss, Walbaum 1792) production technologies.

We investigated environmental impacts on rainbow trout (Oncorhynchus mykiss) reared at fish farms with either extensive technology, in a flow-through system (FTS, n = 3), or intensive technology, in a recirculating aquaculture system (RAS, n = 3). All fish were fed the same rations. Fish were caught in spring and autumn (body mass, 501-750 g) from these six farms. We performed macroscopic (intact fish) and microscopic (gills stained with haematoxylin/eosin) examinations. Lesions were categorised based on the type and location of structural abnormalities. The histopathological index (HAI) was calculated, and each lesion was scored. Fish reared in FTS or RAS were compared for the prevalence of morphological lesions. Gill epithelial hypertrophy and hyperplasia comprised 73% (RAS) to 79% (FTS) of all morphological abnormalities. In spring and autumn, lesions comprised, respectively, 11 and 18% (FTS) and 16 and 10% (RAS) mucous and chloride cell abnormalities and 8 and 4% (FTS) and 10 and 3% (RAS) blood vessel abnormalities. Diffuse, irreversible gill lesions were observed sporadically in all fish. Gill epithelium received the most exposure to environmental pathogens. HAIs indicated that normal gill architecture and minor lesions predominated in all fish. However, among trout caught in spring, moderate and extensive changes in gills occurred more commonly with RAS (34%) than with FTS (17%). Trout caught in autumn displayed no great differences. These results indicated that FTS prepared fish better than RAS for wintering. Moreover, we showed that gills were an excellent biomarker for analysing the impact of extensive and intensive production environments on rainbow trout.

Research Directions in European Veterinary Pathology in 2010-2016 based on the Congresses of the European Society of Veterinary Pathology and the European College of Veterinary Pathologists.

The objective of this paper is to depict the current research directions in veterinary pathology in Europe. The analysis was carried out based on the abstracts and agendas of the annual European Society of Veterinary Pathology (ESVP) congresses organised together with the European College of Veterinary Pathologists (ECVP) in 2010-2016. In total, 1444 presentations were evaluated, including 41 plenary lectures, 319 short oral presentations, and 1081 posters, and in 2016 also three science slams. It was found that infectious and parasitic diseases (467 presentations, 32.34%) and oncology (450 presentations, 31.16%) were the most commonly discussed topics. Organ pathology was also addressed (327 presentations, 22.65%), with the subsequent places taken by research on different topics (140 presentations, 9.70%) and toxicopathology (67 presentations, 4.64%). Among the most commonly presented issues, there was a substantial number of presentations on neurology (129 speeches, 8.93%) and mammary gland diseases (101 presentations, 6.99%). A downward trend was revealed for infectious and parasitic diseases and for oncology, and a positive trend for organ pathology, the first and the third being statistically significant.