Enhancement of Campylobacter jejuni virulence by serial passage in chicks.

Four isolates of Campylobacter jejuni were studied to determine changes in virulence following six serial passages in chicks. Chicks that received invasive isolates exhibited diarrhea and depressed weight gain. Immature mice were used to assess virulence of the passaged isolates of C.

Viability of Vibrio choierae 01 on Frog Legs under Frozen and Refrigerated Conditions and Low Dose Radiation Treatment.

Frog legs were contaminated with Vibrio cholera 01, Inaba serotype, ElTor biotype. The organism remained viable for more than 28 and 2 d when stored at -20°C and 4°C, respectively. Exposure to a multicurie Cobalt source of 50 and 100 kilorads eliminated V.

A descriptive study of dairy goat predation in Louisiana.

Questionnaires concerning herd size, housing and management, and previous instances of predation were mailed to 124 goat owners in Louisiana. Postcards were mailed over a period of one year on a monthly basis, to the 84 individuals who responded to this questionnaire. Owners were asked to indicate whether they had seen predators on their property and whether any goats were injured or killed by the predators.

Evaluation of the origin of Mycobacterium leprae infections in the wild armadillo, Dasypus novemcinctus.

An enzyme-linked immunosorbent assay (ELISA) using the phenolic glycolipid-1 (PGL-1) antigen of Mycobacterium leprae and cross-reactive antisera specific for human IgM was developed to detect IgM antibodies to M. leprae in the nine-banded armadillo (Dasypus novemcinctus). Statistical definitions for positive and negative interpretations in the ELISA were developed by screening animals recently captured and experimentally inoculated with M.

Airflows after inhalation of terbutaline sulphate aerosol from a 750-ml spacer for four weeks.

Terbutaline sulphate was administered to 40 adult asthmatic patients via an ordinary metered-dose inhaler (MDI) or one connected to a 750-ml spacer in an open, randomized, crossover study. Spirometry was obtained before the start of the study and again after four weeks of treatment with each inhaler. The patients recorded on a diary card the severity of their asthma symptoms and the peak expiratory flow rate (PEFR) in the morning before and after drug administration and in the evening.