A new polyether antibiotic, abierixin, was found in the mycelium of a culture broth of nigericin-producing Streptomyces albus NRRL B-1865. Abierixin was extracted with organic solvents and purified by column chromatography and HPLC. The structure of abierixin was determined by FAB/MS/MS and CI/MS/MS and 1H and 13C NMR spectrometries. Abierixin exhibited weak antimicrobial and ionophorous activi...

this study was performed to detect cultivable canine gastric helicobacter-like organisms (ghlo’s) and to evaluate their sensitivity to common antibiotics in two groups of naturally infected dogs (pets and stray dogs). gastric samples were taken from the body and antrum of 30 pets and 30 stray dogs. from each part of canine gastric mucosa, four gastroscopic samples were used for impression smear...

Chicks were treated at 2 weeks of age with 4,15, 40, 100 and 150 mg/kg of monensin, an ionophore used for its anticoccidial and growth-promoting properties. In the present immunohistochemical study, the expressions and distribution of Na+/K(+)-ATPase and Ca(++)-ATPase were studied in myocardium and skeletal muscles (pectoral and quadriceps femoris). We detected an increase of Na+/K(+)-ATPase im...

Here we present details on the WFC3/IR spatial sensitivity test. The aim of the test is to observe a standard star in a grid pattern covering the IR detector to investigate spatial variations in the measured photometry. Any deviations from a uniform response could be due to errors in the flat field calibration file. We find that the current pipe-line IR flat-fields, which are a combination of a...

Avian coccidiosis, an intestinal disease caused by protozoan parasites of the genus Eimeria, occurs worldwide. It is considered to be one of the most economically important diseases of domestic poultry. For many years, prophylactic use of anticoccidial feed additives has been the primary means of controlling coccidiosis in the broiler industry and has played a major role in the growth of this i...