Outbreak of Infection in a Commercial Psittacine Breeding Aviary in Argentina.

Chlamydiosis, caused by is a bacterial infection found in at least 465 species of birds worldwide. It is highly contagious among birds and can spread to humans. In birds, the disease can manifest itself in acute, subacute, and chronic forms with signs including anorexia, diarrhea, lethargy, weight loss, or, occasionally, mucopurulent or serous oculonasal discharge.

Effect of Campylobacter fetus on in vitro fertilization and embryonic development of preimplantation bovine embryos.

Campylobacter fetus is an important veterinary pathogen that causes campylobacteriosis. This disease causes decreased productivity of cattle by inducing reproductive losses. Although several virulence factors have been recognized in C.

Multidrug Resistance and Molecular Characterization of Isolates From Dairy Cattle With Mastitis.

is a pathogen-associated to bovine mastitis, a health disorder responsible for significant economic losses in the dairy industry. Antimicrobial therapy remains the main strategy for the control of this bacterium in dairy herds and human In order to get insight on molecular characteristics of  strains circulating among Argentinean cattle with mastitis, we received 1500 samples from 56 dairy farms between 2016 and 2019. We recovered 56 isolates and characterized them in relation to serotypes, virulence genes, and antimicrobial susceptibility.

Effects of Campylobacter fetus on bull sperm quality.

Campylobacter fetus is a gram-negative, motile, spiral or S-shaped bacterium, which induces campylobacteriosis. This disease causes decrease productivity of cattle. Although considerable research has been done on the role of C.

Tritrichomonas foetus: experimental infection in pregnant BALB/c mice.

Bovine genital tritrichomonosis is a venereal disease produced by the flagellate Tritrichomonas foetus. The disease is characterized by the repetition of oestrus and infertility due to embryonic or foetal death. Numerous experimental rodent models have been developed, but none of them has been applied in pregnant females.

Partial purification and characterization of a trypsin-like serine protease from bovine sperm.

Sperm proteolytic activities are relevant in the enzymatic mechanism of fertilization. Several authors have suggested the presence of serine proteases other than acrosin in mice and human spermatozoa. In this work we describe the characterization of a partially purified bovine sperm serine protease BSp66 and its dimmer, BSp120.

Low temperature-induced dimerization of the bovine sperm serine protease, BSp66.

BSp120 and BSp66 are trypsin-like serine proteases from bovine spermatozoa. The former is active in cryopreserved sperm samples while the latter shows proteolytic activity in recently obtained fresh sperm. Both proteases are immunologically related and co-localize in the apical portion of the sperm head.