Salmonella enterica isolates representing commonly isolated serotypes in Tunisia were analyzed using genotyping and phenotyping methods. ERIC and ITS-PCR applied to 48 Salmonella spp. isolates revealed the presence of 12 and 10 different profiles, respectively. The distribution of profiles among serotypes demonstrated the presence of strains showing an identical fingerprinting pattern. All Salm...

Fecal specimens were collected on 22 different Nebraska ranches and at the Department of Veterinary Science from young calves and pigs with neonatal diarrhea. Enterobacteriaceae isolated from these fecal specimens were screened for resistance to tetracycline, streptomycin, sulfamethizole, kanamycin, chloramphenicol, colistin, nitrofurantoin, and nalidixic acid. Of the 92 strains studied, 57 wer...

associated with excess mortality in the 243 patients included in the analysis, and the measured effect of ACSSuT was achieved by the inclusion of the nalidixic acid–resistant strains in this group. However, all deaths associated with nalidixic acid–resistant strains occurred in the 40 patients with Rtype ACSSuTNx (being DT104s), whereas none of the 43 patients infected with non-ACSSuT strains r...

Acinetobacter baumannii has emerged as a nosocomial pathogen with an increased prevalence of multidrug-resistant strains. The role of the outer membrane protein A (OmpA) in antimicrobial resistance remains poorly understood. In this report, disruption of the ompA gene led to decreased MICs of chloramphenicol, aztreonam, and nalidixic acid. We have characterized, for the first time, the contribu...

Mutants of Escherichia coli selected for resistance to the disinfectant pine oil or to a household product containing pine oil also showed resistance to multiple antibiotics (tetracycline, ampicillin, chloramphenicol, and nalidixic acid) and overexpressed the marA gene. Likewise, antibiotic-selected Mar mutants, which also overexpress marA, were resistant to pine oil. Deletion of the mar or acr...

The majority of Salmonella strains isolated in veterinary laboratories in Poland in 2001 originated from poultry (82%), swine (4%), and animal feeding stuffs (10%). Thirty-two serovars were observed among tested strains. Antimicrobial susceptibility testing revealed the recent trends in Salmonella resistance. The increase in the number of resistant strains was observed. Multiresistance occurred...

Three hundred and thirty-three Shigella isolates obtained in 1986 to 1995 were tested for their susceptibilities to 19 antimicrobial agents. Nalidixic acid resistance had emerged in 59.6% of Shigella flexneri isolates during 1994 to 1995, with all tested resistant isolates having the mutation in gyrA encoding the Ser-83 alteration. Multiresistance (resistance to four or more agents) was more co...

The effect of nalidixic acid on the growth of various deoxyribonucleic acid (DNA) bacteriophages has been investigated by one-step growth experiments. The Escherichia coli bacteriophages T5, lambda, T7 and phiR are strongly inhibited by nalidixic acid, whereas T4 and T2 are only partially inhibited. The Bacillus subtilis bacteriophages SP82, SP50, and phi29 are relatively unaffected by nalidixi...

Submit Manuscript | http://medcraveonline.com In Cambodia and Laos it was ever higher. Especially, children under five years of age were affected. Animals and food as source for human infections play an important role. Carriage of Campylobacter by different animal species and contamination rate of meat are generally high and can reach more than 70%. Resistance to antibiotics is of public health...

patients and methods in this retrospective study, all urine samples of children hospitalized with urinary tract infection (288 patients, aged 1mon -14.5 years) during october 2008 to may 2011 were included in the study. after bacteria were identified by standard methods, antimicrobial susceptibility testing was performed using a panel of antimicrobial agents. results the most of patients were g...