A major concern derived from using antimicrobials in pig production is the development of resistance. This study aimed to assess the impact of selected combinations of oral dose and duration of treatment with oxytetracycline (OTC) on selection of tetracycline resistant (TET-R) coliforms recovered from swine feces. The work encompassed two studies: 1) OTC 5mg/kg and 20mg/kg were administered to ...

Drinking water biofiltration offers the possibility of removal trace level micropollutants from source water. Sand, granular activated carbon (GAC), GAC sandwich (a layer loaded in middle sand bed), and anthracite-sand dual biofilters were set-up duplicate at bench-scale to mimic filtration process real drinking treatment works. During 3-month system operation, five antibiotics (amoxicillin, cl...

Levels of resistance to tetracycline, chlortetracycline, demethylchlortetracycline, doxycycline, oxytetracycline, methacycline, pyrrolidinotetracycline, minocycline, and beta-chelocardin of Escherichia coli K-12 carrying transposon Tn10 or defined DNA segments of Tn10 were determined. In all cases, tetA was the only gene required for resistance. Doxycycline was the most effective inducer of tet...

• Gentamicin initially decreased microbial activity comparative to penicillin higher. Recovery was comparatively high in oxytetracycline treated soils. Organic amendments improved the resilience indices. Unexpectedly qCO2 antibiotic The static effects of applied antibiotics were higher than their cidal effects. This study aimed describe and adverse on soil resulting from manure application. So,...

Description of a rare recurrent Gartner’s duct cyst associated with yeast infection in a crossbred heifer isreported. The recurrence was caused by uncontrolled yeast infection that showed in vitro sensitivity tooxytetracycline. Administration of local clotrimazole and systemic oxytetracycline as per recommendedtherapeutic dose regime resulted in complete recovery.

This paper presents a validated protocol, using a novel, specifically formulated medium, to perform broth microdilution antimicrobial susceptibility assays of the salmonid bacterial pathogen Piscirickettsia salmonis. The minimum inhibitory concentrations (MIC) for florfenicol and oxytetracycline against 58 P. salmonis isolates recovered from various outbreaks occurred in Chilean salmonid farms ...

The pharmacodynamics of oxytetracycline was determined for pig respiratory tract pathogens, Actinobacillus pleuropneumoniae and Pasteurella multocida. Indices of potency were determined for the following: (i) two matrices, broth and pig serum; (ii) five overlapping sets of twofold dilutions; and (iii) a high strength starting culture. For A. pleuropneumoniae, minimum inhibitory concentration (M...

Understanding the impact of antimicrobial use on the emergence of resistant bacteria is imperative to prevent its emergence. For instance, activation of the AcrAB efflux pumps is responsible for the emergence of antimicrobial-resistant Salmonella strains. Here, we examined the expression levels of acrB and its multiple regulator genes (RamA, SoxS, MarA, and Rob) in 17 field isolates of S. Chole...

We describe a 16 year old boy with acne fulminans associated with axial and peripheral polyarthritis. The patient's clinical course and therapy with isotretinoin, prednisolone and oxytetracycline are described. A possible association between the presence of HLA -B 27 antigen and reactive arthritis with acne fulminans in this case is evaluated. A review of the literature is included.

Production of oxytetracycline by an isolated strain of Streptomyces rimosus from Iranian soil was investigated using a special fermentation medium. A comparative study was performed with standard strain PTCC 1144 using the following parameters optimum growth conditions with respect to time, pH, and different amounts of corn steep liquor. Surprisingly, the production yield of the wild strai...