5 research outputs found
Helmintos do cachorro do campo, Pseudalopex gymnocercus (Fischer, 1814) e do cachorro do mato, Cerdocyon thous (Linnaeus, 1766) no sul do estado do Rio Grande do Sul, Brasil
Meiofauna of the Koster-area, results from a workshop at the Sven Lovén Centre for Marine Sciences (TjÀrnö, Sweden)
During a two-week workshop held at the Sven Lovén Centre for Marine Sciences on TjÀrnö, an island on the Swedish west-coast, meiofauna was studied in a large variety of habitats using a wide range of sampling techniques. Almost 100 samples coming from littoral beaches, rock pools and different types of sublittoral sand- and mudflats yielded a total of 430 species, a conservative estimate. The main focus was on acoels, proseriate and rhabdocoel flatworms, rotifers, nematodes, gastrotrichs, copepods and some smaller taxa, like nemertodermatids, gnathostomulids, cycliophorans, dorvilleid polychaetes, priapulids, kinorhynchs, tardigrades and some other flatworms. As this is a preliminary report, some species still have to be positively identified and/or described, as 157 species were new for the Swedish fauna and 27 are possibly new to science. Each taxon is discussed separately and accompanied by a detailed species list
Effects of ultrasonic irradiation and direct heating on extraction of priority pesticides from marine sediments
Post-mortem examination of the Caribbean spiny lobster (Panulirus argus, Latreille 1804) and pathology in a fishery of the Lesser Antilles
Intestinal lesions in pigs affected with postweaning multisystemic wasting syndrome LesĂ”es entĂ©ricas em suĂnos afetados por sĂndrome multissistĂȘmica do definhamento dos suĂnos
Samples of mesenteric lymph nodes and intestines from 79 unthrifty 3- to 5-month-old postweaning pigs, confirmed as naturally affected with postweaning multisystemic wasting syndrome (PMWS), were studied. Pigs originated from 12 farms in southern Brazil and were selected on the basis of clinical signs and/or gross lesions suggestive of enteric disorder. Lymphohistiocytic infiltrates of varying intensity were associated with anti-porcine circovirus type 2 (anti-PCV2) immunostaining (IS) in samples of intestines and mesenteric lymph nodes from all pigs. Although most findings were similar to those described in PCV2-associated enteritis, anti-PCV2 IS in association with depletion of the goblet cell mucin stores (24 pigs), diffuse ileal villous atrophy and fusion (18 pigs), and dilatation of the lymphatic vessels (11 pigs) combined or not with lymphangitis were also observed. PCV2 antigen was immunohistochemically demonstrated in the cytoplasm and nuclei from intralesional epithelial cells, histiocytes, and endothelial-like cells in intestinal tissues. Together these findings imply an association with PCV2. The presence of co-infections by Lawsonia intracellularis, Brachyspira spp., Mycobacterium spp., Salmonella spp., rotavirus, parvovirus, coronavirus and enteric calicivirus with PCV2 in the intestinal lesions was investigated.<br>Amostras de linfonodos mesentĂ©ricos e intestinos de 79 leitĂ”es desmamados refugos, entre 3 e 5 meses de idade e confirmados como naturalmente afetados pela sĂndrome multissistĂȘmica do definhamento foram estudadas. Os suĂnos eram oriundos de 12 criaçÔes no sul do paĂs e foram selecionados em função dos sinais clĂnicos e/ou lesĂ”es macroscĂłpicas sugestivos de doença entĂ©rica. Infiltrados linfoistiocĂticos de intensidades variĂĄveis foram associados com marcação positiva anti-circovirus suĂno tipo 2 (anti-PCV2) em amostras de intestinos e linfonodos mesentĂ©ricos de todos os 79 animais. Embora a maioria dos achados fossem semelhantes aos descritos em enterite associada com PCV2, marcação imuno-histoquĂmica anti-PCV2 foi associada com depleção de cĂ©lulas caliciformes (24 suĂnos), atrofia e fusĂŁo de vilosidades do Ăleo (18 suĂnos) e dilatação de vasos linfĂĄticos (11 suĂnos) combinada ou nĂŁo com linfangite. AntĂgenos de PCV2 foram demonstrados por imuno-histoquĂmica no citoplasma e nĂșcleo de cĂ©lulas epiteliais intralesionais, histiĂłcitos e cĂ©lulas tipo endotelial em tecidos intestinais. Em conjunto, esses resultados sugerem que as lesĂ”es estavam associadas com PCV2. A presença de co-infecçÔes por Lawsonia intracellularis, Brachyspira spp., Mycobacterium spp., Salmonella spp., rotavĂrus, parvovĂrus, coronavĂrus e calicivĂrus entĂ©rico com PCV2 nas lesĂ”es intestinais foi investigada