Notable fibrolytic enzyme production by Aspergillus spp. isolates from the gastrointestinal tract of beef cattle fed in lignified pastures.

Fungi have the ability to degrade vegetal cell wall carbohydrates, and their presence in the digestive tract of ruminants can minimize the effects of lignified forage on ruminal fermentation. Here, we evaluated enzyme production by Aspergillus spp. isolates from the digestive tracts of cattle grazed in tropical pastures during the dry season.

Polymorphisms of the XRCC1 gene and breast cancer risk in the Mexican population.

The purpose of this case-control study was to evaluate the association of XRCC1 Arg194Trp and Arg399Gln polymorphisms with susceptibility to breast cancer (BC) in a Mexican population. We analysed DNA samples from 345 BC patients and 352 control subjects by polymerase chain reaction-restriction fragment length polymorphism. The frequency of the 399Gln allele was 23% in controls and 29% in patients [OR 1.

[Assessment of ischemia-reperfusion injury and early acute rejection in experimental lung transplantation after prolonged ischemia].

Objective: To assess ischemia-reperfusion injury and early acute rejection of the lung subjected to ischemia for 10 hours.

Material And Methods: Fifteen of 30 Sprague-Dawley rats underwent transplantation of a left lung that had been subjected to ischemic times of 4 (n=5), 6 (n=5), or 10 hours (n=5). The cardiopulmonary block was removed from the donor, the left lung was dissected, and the transplant was carried out using the cuff technique.

[Genital histoplasmosis. Presentation of a clinical case].

Objectives: On December 1905 Darling, resident histopathologist on the Panama Channel area, observed a parasite in the large mononuclear cells of different organs. Negroni in 1914 described the first Argentinean case. Lung, oral, nasal, and laryngeal involvement are common.