Biomedical subjects

G M Purvis

Publications and source records attributed to G M Purvis.

10 recordsLinked to original sources

PubMed2005

Persistence of Salmonella Typhimurium DT120 in abattoir paddocks holding sheep.

In the summer of 1999 there was an outbreak of Salmonella Typhimurium DT120 in people in the north of England which was unusual in being sensitive to antimicrobial drugs. The outbreak was linked to mutton and lamb from a local abattoir, and attention focused on four holding paddocks used to retain sheep before slaughter. In November 1999, samples of soil and faeces were taken from these paddocks and samples of faeces were taken from the concrete race leading from them. Salmonella Typhimurium was isolated from 59 of the 100 samples. Between January 2000 and October 2000 seven visits were made to the abattoir at each of which 100 samples were taken from the paddocks and concrete race and examined for the presence of Salmonella. The paddocks remained heavily contaminated with S Typhimurium DT120 until April when there was a marked reduction in the recovery of the organism. By June the contamination was minimal and by August it had disappeared, and the organism was not recovered in September or October.

Abattoirs↗

PubMed1999

Prehospital ECG monitoring of chest pain patients.

Prehospital electrocardiograms (ECGs) have been shown to decrease the time from onset of pain to onset of treatment. They are obtained prior to treatment while the patient is likely to have his/her most intense pain. With paramedics initiating care in the field, patient assessments may be clinically different by the time the patient reaches the hospital. Thus, obtaining an ECG as early as possible during treatment could aid in the access to treatment for the few patients whose ECGs improve with prehospital care. We present a case in which the prehospital presentation was indicative of an acute myocardial infarction (MI), whereas the presentation to the hospital was not as clear-cut. The patient was taken immediately to the catheterization laboratory based on the prehospital findings and was found to have an acute MI that was treated. Laboratory findings indicated that there was a significant improvement in patient outcome based on this early treatment. This case further illustrates the role of a prehospital ECG.

Adult↗

PubMed1985

Taenia hydatigena: a cause of persistent liver condemnations in lambs.

A problem of high levels of liver condemnations which had affected bought-in lambs fattened on a North Yorkshire farm for several years was investigated. Because the farmer spread pig slurry on the land, migrating Ascaris suum larvae were initially suspected as a cause but the investigation eliminated this possibility. Migrating Taenia hydatigena larvae were found in tissue sections and isolated from livers. A combination of parasitological and serological evidence using oncospheral antigen in an ELISA suggested that infection was occurring immediately before the arrival of lambs on the farm, although a source of infection on the farm was also identified. Peak liver condemnations occurred in December-January. Possible reasons for this are suggested and the relevance of these findings to national liver condemnation losses are discussed.

Animals↗

PubMed1985