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Biomedical subjects

S C Matthews

Publications and source records attributed to S C Matthews.

9 recordsLinked to original sources
PubMed1993

Tissue bonding: the bacteriological properties of a commercially-available cyanoacrylate adhesive.

The medical use of cyanoacrylate adhesives for tissue bonding is well established, and their use for tacking skin grafts into place is a regular procedure, for which purpose their case and speed of use seems highly advantageous. As medical grade cyanoacrylate tissue adhesives are fairly expensive, the bacteriological safety of using a commercially-available over-the-counter cyanoacrylate adhesive was investigated. The product was found to be sterile when purchased and remained so during use and between patients. There was also some evidence of bacteriostatic properties. These investigations suggest that the commercially-available product is bacteriologically acceptable, and at approximately 28% of the cost of the medical grade product would show considerable cost savings.

Bacteriological Techniques↗
PubMed1992

Search for enteric microbial pathogens in patients with ulcerative colitis.

Microbial pathogens were sought in faeces of patients with active ulcerative colitis and again after 3 months treatment. 64 patients were examined during their first episode of ulcerative colitis and 30 with relapse of chronic disease. At presentation, bacterial pathogens were not found; 1 patient had cryptosporidiosis. In 10 patients treatment appeared to result in some loss of colonisation resistance as evidenced by colonisation with beta-haemolytic streptococci, Staphylococcus aureus, candida and Clostridium difficile. Unidentified cytotoxic activity was present in the faeces of 4 patients at presentation and 2 patients during or after treatment. We conclude that enteric infection is an uncommon finding in patients with active ulcerative colitis.

Colitis, Ulcerative↗
PubMed1988

An appraisal of methods used in the examination of retail samples of cows milk.

The use of the methylene blue test for the examination of cows milk was investigated in an inter-laboratory survey. A poor relationship was found between results of these tests and total viable counts. Coliforms were detected in a large number of pasteurized milks, indicating frequent post-pasteurization contamination. No relationship was found between the results of the methylene blue test and the presence of coliforms. Results from this survey highlight the need for reappraisal of the methylene blue test as a statutory method for the examination of milk. A total viable count and coliform test are suggested for providing information regarding dairy hygiene and the quality of the product at the point of retail sale.

Animals↗
PubMed1985

The microbiology of cooked prawns and shrimps on retail sale.

In an inter-laboratory survey, 148 samples of cooked prawns and shrimps were obtained at the point of sale to the consumer. Salmonellae and Vibrio parahaemolyticus were not detected. Yersinia enterocolitica was isolated from three samples. Results for total viable count and presence of Escherichia coli and Staphylococcus aureus complied well with available guidelines for imported cooked prawns, suggesting that the risk of food poisoning from retail samples of these foods in the South of England is minimal.

Decapoda↗
PubMed1984

The microbiology of selected retail food products with an evaluation of viable counting methods.

In an inter-laboratory survey, the pour plate, surface spread, agar droplet and spiral plate methods were used in parallel with the surface drop method for enumeration of micro-organisms in foods. Good agreement was obtained between all surface methods of enumeration, but there was poor agreement between molten agar methods and the surface drop method. A total of 1143 samples of food that were ready for consumption at the point of retail sale were examined. Eight types of food products were chosen: meat pasties, sausage rolls, real-cream slices, synthetic-cream slices, mayonnaise-based coleslaws, faggots, patés and continental sausages. The results of this survey suggest that the upper limit for an acceptable viable count should vary according to the food product. Salmonellae were not isolated on any occasion. Potentially harmful organisms were not isolated at levels expected to constitute a public health hazard. Information concerning the nature of the product, the total viable count, the presence or absence of pathogenic, toxigenic or indicator organisms, the spectrum of the bacterial flora and the relative predominance of each organism must all be considered when assessing the microbiological acceptability of retail 'ready to eat' products.

Bacillus cereus↗