Assessment of the hemagglutinating activity of the Porcine orthorubulavirus.

Blue eye disease (BED) in pigs is caused by Porcine orthorubulavirus (PRV) of the Paramyxoviridae family. It is an endemic disease in swine production in the central region of Mexico and causes nervous signs and high mortality in suckling pigs, pneumonia in growing pigs, orchitis in boars and mummification during gestation. PRV hemagglutinates most red blood cells (RBCs) of domestic species.

Sphingosine-1-phosphate (S1P) in ovarian physiology and disease.

Sphingosine-1-phoshate (S1P) is a membrane sphingolipid involved in several physiological processes, including cell proliferation, tissue growth, cell survival and migration, inflammation, vasculogenesis, and angiogenesis. Herein, we review the most critical effects of S1P on ovarian function, including its physiological and pathophysiological effects. Based on the available evidence, S1P plays an important role in ovarian physiology, participating as an essential stimulator of follicular development in both the preantral and antral phases, as well as in ovulation and corpus luteum development.

Co-ordinated expression of the VEGF system components in granulosa cells to develop a proangiogenic autocrine milieu during ovarian follicle development.

In the present study, we investigated the temporal relationship between angiogenic and antiangiogenic vascular endothelial growth factor isoforms (VEGFxxxa and VEGFxxxb, respectively), the receptors VEGFR1 and VEGFR2, their soluble forms, and the kinases and the splicing factors regulating the synthesis of VEGF isoforms in healthy and atretic antral follicles. The results show a higher (p < 0.05) messenger RNA (mRNA) expression of VEGF120a, VEGF164a, and VEGF120b in healthy than in atretic follicles, but the mRNA expression of VEGF164b was not detected.

Phylogenetic analysis of ORF5 and ORF7 of porcine reproductive and respiratory syndrome (PRRS) virus and the frequency of wild-type PRRS virus in México.

Porcine reproductive and respiratory syndrome (PRRS) is caused by a genetically diverse RNA virus and is an economically significant disease in the swine industry. In this study, a total of 8,126 serum samples were obtained from 275 technified and semi-technified farms belonging to 30 of the 32 states of Mexico and representative of the eight regions of the country. Anti-PRRSv antibodies against the PRRS vaccine and an isolated wild Mexican virus were tested by ELISA.

Serological study of influenza viruses in veterinarians working with swine in Mexico.

Humans and swine are both affected by influenza viruses, and swine are considered a potential source of new influenza viruses. Transmission of influenza viruses across species is well documented. The aim of this study was to evaluate the seroprevalence of different influenza virus subtypes in veterinarians working for the Mexican swine industry, using a hemagglutination inhibition test.