جستجوی مقالات مرتبط با کلیدواژه "teta" در نشریات گروه "زیست شناسی"

Salmonellosis is the most important form of bacterial infection in humans and animals caused by the non-typhoid salmonella family. Salmonella infection is the most common cause of foodborne infections. One of the most important sources of Salmonella contamination is poultry and meat products. In the last two decades, the emergence of Salmonella resistant to common antibiotics has increased the problems of Salmonella contamination in meat products. Transmission of these resistant bacteria to humans makes the treatment process difficult and lengthy. The aim of this study was to determine the prevalence of Salmonella bacteria and tetA and tetB resistance genes from poultry stores in Zahedan. In this descriptive cross-sectional study, Salmonella isolates were isolated from 130 poultry stores in Zahedan based on standard methods published by OIE and FDA. The results of this study show that only 6.15% of the samples were Salmonella and 3.07% were Salmonella typhimurium strains. Examination of the frequency of resistance genes in isolated samples in the present study shows that in 50% of Salmonella isolates, none of the tetA or tetB resistance genes was detected, while in the other 50%, only the tetB resistance gene was identified. The presence of tetracycline resistance genes in Salmonella isolates suggests that the use of antibiotics in the poultry industry should be controlled and more carefully used to reduce the frequency of these genes.

Aim and Urinary tract infection is one of the most prevalent diseases in human. Unfortunately, the indiscriminate use of antibiotics leads to resistance in bacteria gradually. The aims of this study were to determine the prevalence and distribution of antibiotic resistance to tetracycline resistance genes in uropathogenic Escherichia coli isolated.
Material and In this study, 210 urine samples were collected during four months. Antibiotic susceptibility testing was performed as recommended by the Clinical Laboratory Standards Institute (CLSI) using disk diffusion method. All isolates were then examined for presence of the tetA and tetB genes.
Of the 210 urine samples with UTI collected from hospitals, the 150 isolates of E. coli were isolated. Most of antibiotic resistance was related to tetracycline (68%) and least of antibiotic resistance was related to chloramphenicol (8.66%). Among isolates (86.27%), were tetA gene and in 83 isolates (81.37%) tetB gene was detected. 74 (72.45%) isolates were positive for both genes, and 5 (4.90%) isolates were negative for them.
Resistance to tetracycline and other antibiotics, and the presence of tetA and tetB genes in UPEC strains are alarming signs in our area. The current study strongly recommends restricted the consumption of antibiotics including tetracycline. Further studies should be conducted in order to find out the extent of the problem in other areas.