Adenosquamous Carcinoma of the Trachea in a Domestic Ferret (Mustela putorius furo)     

Olivia A. Petritz  Natalie Antinoff  Catherine Pfent  Wayne Corapi  Roy R. Pool  Michelle Fabiani  Sue Chen 《Journal of Exotic Pet Medicine》2013,22(3):287-292

A 4-year-old, castrated, male domestic ferret (Mustela putorius furo) was evaluated for a possible upper respiratory tract infection and wheezing for approximately 3 weeks. Supportive care for a suspected upper respiratory tract infection was initiated; however, the patient became progressively more dyspneic over the next 48 hours. A possible tracheal mass was identified upon thoracic radiographic imaging of the ferret. Tracheoscopy and a computed tomography scan of the neck and thorax confirmed the presence of a tracheal mass approximately 3 cm from the larynx obstructing 80% of the tracheal lumen. Rather than pursuing surgical resection, the owners elected humane euthanasia. An adenosquamous carcinoma of the trachea was diagnosed after histologic analysis. This tumor type has been diagnosed in the lungs of ferrets that were experimentally exposed to carcinogens found in cigarette smoke; however, there are no previous reports of this or any other tumor type associated with the ferret trachea. A tracheal mass causing a partial upper airway obstruction should be considered within the differential disease diagnosis list when a ferret is presented with dyspnea.  相似文献   

Antibacterial activity of sponge extracts against fish pathogens     

S Choudhury  P Pattnaik  A Sree  M Bapuji  & S C Mukherjee 《Aquaculture Research》2003,34(12):1075-1077

The antibacterial properties of organic extracts of 15 species of sponges collected from a depth of 30 m in the coastal waters off Gopalpur (Bay of Bengal) were tested against six virulent fish pathogens. The extracts of 11 sponges showed species‐specific antibacterial activity. Four extracts exhibited broad antibacterial activity against three or more species. Epipolasis topsenti was active against all the six pathogens and showed the lowest minimum inhibitory concentration (MIC) value of 12.5 μg against three pathogens. Chromatographic fractionation of extracts yielded enriched fractions with increased activity and lower MIC values.  相似文献   

l‐Arabinose Release from Arabinoxylan and Arabinogalactan Under Potential Gastric Acidities     

Pingyi Zhang  Qian Zhang  Roy L. Whistler 《Cereal Chemistry》2003,80(3):252-254

Arabinofuranosyl groups are present in many hemicelluloses as single or multiple units attached to the main xylan or galactan chain where they are sensitive to acid hydrolysis. Under acidic conditions of the human stomach, up to 10% of the L‐arabinose is released from the hemicellulose of corn hull, larch wood, and banana peel hemicellulose.  相似文献   

Habitat partitioning among three predatory fish in a temperate reservoir     

Samuel Westrelin  Julien Cucherousset  Romain Roy  Laurence Tissot  Frdric Santoul  Christine Argillier 《Ecology of Freshwater Fish》2022,31(1):129-142

The diversity of predatory species plays a key role in ecosystem functioning but our understanding of the mechanisms underlying their coexistence is limited, particularly in freshwater ecosystems. Northern pike Esox lucius, European perch Perca fluviatilis and pikeperch Sander lucioperca are three widespread predatory species in European lakes, where they often coexist. As potential competitors, we hypothesised that partitioning habitat is a determinant of species coexistence. This was tested by quantifying the variability of their habitat use in tracking adult individuals in the Bariousses reservoir (France, 86.6 ha, mean depth 7.1 m). Specifically, we investigated their distribution along the littoral–pelagic and depth axes along the daily cycle and across seasons. From littoral to pelagic waters were first found pike, then perch and finally pikeperch. Pike was the closest to the surface while pikeperch was the deepest. This general pattern was, however, variable across seasons with the three species located in the upper layer in summer during reservoir stratification. Individuals were more evenly distributed along the littoral–pelagic axis and closer to the bottom when water was mixing (autumn, winter). In summer, perch used more intensively in the pelagic zone during the daytime. Other species did not show any diel change of habitats. Our results highlighted that species coexistence is associated with habitat partitioning among these three predators, with perch showing a more variable behaviour regarding habitat characteristics. Now more than ever, in the context of global change which modifies habitats, it is of crucial importance to understand the coexistence mechanisms of species that shape ecosystems.  相似文献   

Correction: Dissecting the plant genome: through new generation molecular markers     

Choudhury  Amrita  Deb  Sohini  Kharbyngar  Banridor  Rajpal  Vijay Rani  Rao  Satyawada Rama 《Genetic Resources and Crop Evolution》2022,69(8):2699-2708

Genetic Resources and Crop Evolution -  相似文献