Tetracyclines are known antimicrobial compounds that present low cost and constitute one of the most widely used antibiotic groups, not only in human medicine for the treatment of infectious diseases but also in the stockbreeding sector as preventive and curative drugs or as an additive in animal feed 1 . The quality control of veterinary pharmaceuticals commercially available is an issue of re...

BACKGROUND: Tetracyclines (TCs) are broad-spectrumantibiotics that are widely used in veterinary medicine. Thepresence of TCs residues in milk is a public health concern allover the world. OBJECTIVES:This study aimed to determine TCsresiduals in pasteurized milk marketed by some dairy companiesin Tehran from April 2011 to March 2012. METHODS: 432pasteurized milk samples were purchased from supe...

antibiotic resistance pattern of salmonella and e. coli isolated from chickens against several antibiotics was determined. a total of 150 samples from chickens were isolated and identified using various enrichment and special media. disc diffusion antibiotic susceptibility test was performed and mic and mbc of doxycycline were also determined using serial dilution method. sixty nine bacterial i...

Until today, the pathogenesis of rosacea is not known in detail. Yet in recent years evidence has been accumulating that rosacea with its common symptoms such as inflammatory lesions, erythema, telangiectasia, phymatous changes, and ocular symptoms is of inflammatory nature. Tetracycline derivatives like doxycycline successfully used in the treatment of skin diseases like acne and rosacea seem ...

The in vitro activities of cyclines (tetracycline, doxycycline, minocycline, oxytetracycline, and rolitetracycline), macrolides (erythromycin, spiramycin, roxithromycin, and lincomycin), quinolones (norfloxacin and ofloxacin), rifampin, thiamphenicol, tobramycin, metronidazole, vancomycin, phosphomycin, and cephalosporins (cephalexin, cefaclor, cefamandole, cefuroxime, ceftriazone, cefotaxime, ...

Urea Nitrogen to Creatinine Ratio Related Information: Creatinine, Serum or Plasma Osmolality, Serum Urea Nitrogen, Serum or Plasma Synonyms: BUN to Creatinine Ratio Test includes: Serum creatinine and serum urea nitrogen. Background: Useful to distinguish between preand postrenal diseases, gastrointestinal bleeding, and renal diseases. High BUN/creatinine ratio: Decreased renal perfusion, hypo...

Helicobacter pylori infection is chronic situation that increases the risk of development of peptic ulcer disease, mucosa-associated lymphoid tissue lymphoma (MALT), and gastric cancer. In many developing countries, such as Iran, H. pylori infect approximately 80 % of the population. Management of H. pylori infections is difficult, and relapse frequently occurs after successful eradication of t...

We have developed an activator/repressor expression system for budding yeast in which tetracyclines control in opposite ways the ability of tetR-based activator and repressor molecules to bind tetO promoters. This combination allows tight expression of tetO- driven genes, both in a direct (tetracycline-repressible) and reverse (tetracycline-inducible) dual system. Ssn6 and Tup1, that are compon...