Observations on the etiology, prophylaxis and therapy of pasture bloat

Absorption and metabolism of longchain fatty acids by bovine rumen mucosa

“…Better emulsification of the test solution than was obtained in earlier trials was achieved by 1) mixing the oleic acid with an equal volume of soybean oil emulsifier (Johnson (1959)) before adding the Krebs-Ringer phosphate and 2) treating the test solu tion with the sonicator for 30 min prior to introduction into the emptied, washed rumen.…”

In vitro lipolysis of triglycerides by bovine rumen microorganisms

“…The ability of different antibiotics to prevent bloat in ruminants on legume pasture has been studied in detail at this University. An excellent report and dis cussion on this subject has been made recently by Johnson (25). Penicillin, erythromycin, and tylosin were highly effective for periods of several days but more lasting pro tection was obtained by using several antibiotics in rotation or in combination.…”

Interrelationships of antibiotics in bloat prevention

“…One of the most complete reviews of the subject available would be the combination of the reviews of literature in the theses of my predecessors and colleagues in bloat research at Iowa State University: Blake (1955), Brown (1959), Johnson (1959) and Kassir (1962). Therefore, this review will in clude only literature relating to the use of antibiotics in bloat prevention and other applicable research not included in the above mentioned reviews.…”

“…Similarly, erythromycin (Johnson et al. 1958a) has been shown Ô to exert a definite preventive effect for about 7 or 8 days after which the animal becomes refractory to the antibiotic.…”

“…Advances also have been made in therapy of pasture bloat with use of antifoaming agents. Vegetable oils have shown the most promise because they are both palatable and effec tive (Johnson et al. 1958a(Johnson et al.…”