The objective of this study was to assess the impact of diverse plasmids bearing colistin resistance gene mcr-1 on host fitness. Forty-seven commensal E. coli isolates recovered from the pig farm where mcr-1 was first identified were screened for mcr-1. mcr-1-bearing plasmids were characterized by sequencing. The fitness impact of mcr-1-bearing plasmids was evaluated by in vitro competition ass...

DH5α is specific strain of E. coli that is a nonpathogenic bacterium belonging to the genus Escherichia. I used this type of bacteria to study comparative growth rates at different temperatures (28°C, 37°C, and 45°C) and for different times (24h, 48h, and 72h). I predicted that bacteria would grow best at 37°C compared to the other temperatures, because the mean temperature of many mammals is 3...

BACKGROUND Neosporosis is caused by an obligate intracellular parasitic protozoa Neospora caninum which infect variety of hosts. NcSRS2 is an immuno-dominant antigen of N. caninum which is considered as one of the most promising targets for a recombinant or DNA vaccine against neosporosis. As no study has been carried out to identify the molecular structure of N. caninum in Iran, as first step,...

Enterovirus A71 (EV-A71) là tác nhân chính gây nên biến chứng nguy hiểm của bệnh Tay Chân Miệng, có thể dẫn đến thương tật, và tử vong ở trẻ nhỏ. Hiện nay, vaccine hợp chất điều trị EV-A71 còn nhiều hạn chế, chưa được áp dụng rộng rãi. Vì thế, nghiên cứu tìm giải pháp thay thế hoặc bổ trợ đang tiến hành, trong đó bẫy virus. Với chức năng bắt, cố định virus, ngăn sự xâm nhiễm, bám cấu trúc từ th...

Colicin-mediated killing is an example of allelopathy, which has been found among several bacteria. Screening of 42 strains of Shigella sonnei isolated from diarrheal patients revealed that 39 (93%) S. sonnei strains were positive for colicin production against Escherichia coli DH5α. In the PCR-based detection of the colicin types, 36 (92.3%) were identified as E3, 2 (5.1%) as E3 and E8, and 1 ...

Background: Mycobacterium tuberculosis antigen38 is a potent serodiagnostic agent containing two M. tuberculosisspecific B-cell epitopes. The high price of imported diagnostic agents hinders realization of fast clinical TB diagnosis in developing countries. Therefore, we produced recombinant antigen38 (recAg38M) from M. tuberculosis local strain, which might be used to produce economical tuberc...

Shiga-toxigenic Escherichia coli (STEC) O157:H7 uses a myriad of surface adhesive appendages including pili, flagella, and the type 3 secretion system (T3SS) to adhere to and inflict damage to the human gut mucosa. Consumption of contaminated ground beef, milk, juices, water, or leafy greens has been associated with outbreaks of diarrheal disease in humans due to STEC. The aim of this study was...