Antibiotic resistance evolves rapidly in response to drug selection, but it can also persist at appreciable levels even after the removal of the antibiotic. This suggests that many resistant strains can both be resistant and have high fitness in the absence of antibiotics. To explore the conditions under which high-fitness, resistant strains evolve and the genetic changes responsible, we used a...

Sows and pigs from 10 commercial swine farms were sampled to determine patterns of resistance of fecal Escherichia coli to five commonly used antibiotics. Before testing, farms were categorized as high or low antibiotic use based on interviews with the respective producers. On each farm, fecal swabs were obtained from five sows at 7 d postpartum and from five pigs from each sow at 7, 35, and 63...

Background: Urinary tract infection (UTI) is a common bacterial disease which may cause chronic renal failure and hypertension. Many reports suggest that the rate of antibiotic resistance to infectious organisms is increasing. Objectives: This study aimed to detect and also compare the frequency and drug resistance pattern of Gram negative bacteria isolated from patients with community-acquired...

Present study investigated the antibiotic resistance profile of bacterial strains isolated from soil, sediment and waters of Eloor-Edayar Industrial belt of Kerala, South India. A total of 165 bacterial strains were isolated and tested for their sensitivity to 11 common antibiotics (Ampicillin, Erythromycin, Gentamycin, Nalidixic acid, Penicillin, Vancomycin, Novobiocin, Amikacin, Kanamycin, St...

OBJECTIVES The optimal duration of antibiotic treatment in patients with bloodstream infections remains contentious, with concerns regarding both undertreatment and the encouragement of antibiotic resistance. In our ICU we traditionally use short-course antibiotic monotherapy as the mainstay of treatment. We sought to document the impact of this strategy on pathogen type, resistance patterns an...

OBJECTIVE To address the issue of emerging antibiotic resistance and examine which organisms will continue to pose problems in the new century. METHODS Review of articles pertaining to bacteria recognised for increasing resistance. RESULTS Changing resistance patterns are correlated with patterns of antibiotic use. This results in fewer effective drugs against "old" established bacteria e.g...

background acinetobacter calcoaceticus baumannii (acb) complex are gram-negative opportunistic bacteria with low virulence properties. their resistance to antibiotics has become a matter of concern in hospital infections. objectives the present study aimed to determine the prevalence and antimicrobial susceptibility of acb isolates collected from the nemazee hospital of shiraz. in addition, pul...

pseudomonas aeruginosa is a leading cause of bum infections, and antibiotic- resistant strains of this bacterium are emerging due to extensive application of antibiotics in the bum unit of hospitals. in this study 50 strains of p. aeruginosa were isolated from bum patients infected with this micro-organism in the bum unit of a general hospital in kerman, iran over one year [may 1999-aprii2000]....