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S Felstead

Publications and source records attributed to S Felstead.

2 recordsLinked to original sources
PubMed2005

Development of an antibody-detection ELISA for Fasciola hepatica and its evaluation against a commercially available test.

An ELISA was developed for the detection of Fasciola hepatica antibody in serum of cattle. The assay was applied to sera from 258 naturally infected cattle, 256 non-infected cattle and six calves experimentally infected with F. hepatica. The diagnostic sensitivity and specificity of the ELISA test was 98% (95% confidence intervals, 96-100%) and 96% (95% confidence intervals, 93-98%) respectively at a cut-off value of 15% positivity. The results using sera from the experimentally infected calves showed that antibodies were first detected 2-4 weeks after infection. The ELISA test was also compared to the commercially available Bio-X bovine F. hepatica ELISA kit. A subset of 39 positive sera and 47 negative sera were selected from the samples used to evaluate the in-house test. The results indicated that the agreement between the two tests was almost perfect (k statistic=0.82).

Animals↗
PubMed1995

Azithromycin drug interactions.

Pre clinical work in vivo and in vitro have suggested that azithromycin has a low potential for significant drug interactions. Clinical studies conducted thus far have generated results in accordance with the preclinical science [6]. Direct comparisons with the most modern macrolides have been published and evidence suggests that azithromycin is likely to be associated with fewer significant drug interactions. However, as a final point, I wish to point out that proof of an absolute negative is not possible and therefore in any patient, on multiple medication with adverse findings, a drug interaction should be considered as part of the differential diagnosis.

Anti-Bacterial Agents↗