A three-strain mixture of Escherichia coli O157:H7 was inoculated into fresh dairy compost (ca. 10(7) CFU/g) with 40 or 50% moisture and was placed in an environmental chamber (ca. 70% humidity) that was programmed to ramp from room temperature to selected composting temperatures in 2 and 5 days to simulate the early composting phase. The surviving E. coli O157:H7 population was analyzed by dir...

In present study, spray-dried sourdough was produced using a pilot scale spray dryer and the physico-chemical and microbial characteristics of the obtained sourdough powder were investigated. The application of the spray-dried sourdough at different levels (3%, 6%, 9% and 15%) in breadmaking was also evaluated. Bulk density, wettability and suspensibility of the sourdough powder were 0.6 g/cm(3...

This Prospective analytic study was conducted at the microbiology laboratory of Dr. Ziauddin Hospital to find out minimum temperature and duration required to eradicate common bacterial pathogens from water samples. High concentration (> 1014 cfu/ml) of five common diarrheal pathogens were added to 100 ml water samples and heated till 40 degrees C, 60 degrees C, 100 degrees C, and two samples w...

The rapid high-throughput detection of foodborne pathogens is essential in controlling food safety. In this study, a 10-channel up-converting phosphor technology-based lateral flow (TC-UPT-LF) assay was established for the rapid and simultaneous detection of 10 epidemic foodborne pathogens. Ten different single-target UPT-LF strips were developed and integrated into one TC-UPT-LF disc with opti...

Bacterial chemotaxis may have a significant impact on the structure and function of bacterial communities. Quantification of chemotactic motion is necessary to identify chemoeffectors and to determine the bacterial transport parameters used in predictive models of chemotaxis. When the chemotactic bacteria consume the chemoeffector, the chemoeffector gradient to which the bacteria respond may be...

Cinemicrographic studies revealed that the development of elongated subsurface colonies of Staphylococcus aureus in soft agar (<0.2% agar) originated with a colony-forming unit of about 10 to 20 cells. It was then observed that small clusters of 3 to 12 cells broke off from the main colony unit and drifted away under the combined influence of gravity and Brownian motion. Once the downward or sl...

Modified atmosphere packaging (MAP) is increasingly used to extend shelf-life of fresh produce. In the present work, we determine the survival and growth of Yersinia enterocolitica and aerobic mesophiles on fresh poultry sausage under MAP. Samples were divided in two lots, half inoculated with 10 cfu g of Y. enterocolitica ATCC 9610, and half uninoculated control samples. The inoculated and con...

Few studies have investigated the occupational hazards of municipal solid waste workers, particularly in developing countries. Resultantly these workers are currently exposed to unknown and unabated occupational hazards that may endanger their health. We determined municipal solid waste workers' work related hazards and associated adverse health endpoints. A multifaceted approach was utilised c...

Methods: Fifteen extended-spectrum b-lactamaseor carbapenemase-producing E. coli were studied. The in vitro pharmacodynamic model was inoculated with 1×10 cfu/mL and ertapenem was dosed once daily at 0 and 24 h to simulate free ( f ) Cmax and t12 obtained after either 1 g or 2 g intravenous once-daily doses in healthy volunteers (1 g: f Cmax 15 mg/L, t12 4 h). Sampling was performed over 48 h t...

The aim of this study was to evaluate the commercial chair-side assays Saliva-Check Mutans and ClinproTM Cario L-PopTM in high microbiological caries-risk dental students compared with conventional semi-quantitative colony counting culture-based technique as the reference method. Saliva samples from 93 subjects of both sexes aged 18-26 years were seeded (Köhler and Bratthall method) on plates c...