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Biomedical subjects

G E Ward

Publications and source records attributed to G E Ward.

71 records · Page 4Linked to original sources
PubMed1978

Abortion in mice associated with Pasteurella pneumotropica.

Pasteurella pneumotropica was isolated from the uteri, fetuses, lungs, and spleens of aborting Swiss Carworth mice. Male mice in the colony carried P. pneumotropica in pharynges, testes, and seminal vesicles. Normal pregnant and nongravid females carried P. pneumotropica in the eye of 1 and in the uteri of 4 of 11. Pregnant mice from another colony did not abort when injected with P. pneumotropica. Necrotizing and suppurative metritis was found among aborting females with P. pneumotropica infections. Occurrence of malignant lymphoma and mammary adenocarcinoma among animals in this colony likely resulted in immunosuppression which could have predisposed animals to the diseases seen.

Abortion, Veterinary↗
PubMed1978

Correlation of microbiological and histological findings in bovine fibrinous pneumonia.

In a retrospective morphological and microbiological study, 39 of 55 cases of bovine fibrinous pneumonia were diagnosed as fibrinous pleuropneumonia. Twenty-nine of these 39 (74%) were associated with Pasteurella hemolytica, but only two cases (5%) with P. multocida. In contrast, of the 16 cases classified as fibrinous bronchopneumonia, one (6%) was associated with P. hemolytica, and nine (56%) with P. multocida. In eight cases Mycoplasma and Hemophilus somnus were found in association with either P. hemolytica or P. multocida but were never isolated alone. We concluded that the use of the term pasteurellosis, implying Pasteurella as the cause, is imprecise because lesions associated with P. hemolytica fulfill the criteria of a fibrinous pleuropneumonia, whereas P. multocida is more likely to cause a bronchopneumonia with moderate amounts of fibrin.

Animals↗
PubMed1976

Use of a formalin-treated, live Escherichia coli vaccine in the prevention of neonatal enteric colibacillosis in swine.

A field trial was conducted to evaluate the effectiveness of an Escherichia coli vaccine in prevention of neonatal enteric colibacillosis in swine. Sows (272 total) were allotted to control (151 sows) and vaccinated groups (121 sows). Sows in the vaccinated groups were given a single intramuscular injection of a formalin-treated, live E coli vaccine 10 to 20 days prior to farrowing. The effects of the vaccination were to: (1) reduce mortality from 2.14 to 0.93 (P less than 0.001) pigs per litter; (2) reduce number of pigs with diarrhea, from 7.28 to 3.12 (P less than 0.004) per litter; and (3) increase number of pigs weaned, from 7.62 to 8.2 (P less than 0.005) per litter. The advantages of vaccination were most apparent in the barns with less than adequate sanitation and ventilation.

Animals↗
PubMed1976

Salmonella typhimurium infection in guinea pigs: observations on monitoring and control.

A spontaneous outbreak of salmonellosis in a guinea pig colony was caused by Salmonella typhimurium. A simple, comprehensive monitoring procedure, consisting of mass fecal sampling, was developed. Using the monitoring system described, the disease was eliminated by: 1) removal of animals in pens in contact with Salmonella, and 2) strict hygienic procedures. It was not necessary to depopulate the colony in order to control the disease.

Animals↗