The Effect of Aureomycin on the Gut of Pig

Effects of administration of antimicrobials in feed on growth rate and feed efficiency of pigs in multisite production systems

“…13 Therefore, because control groups in the present study grew considerably faster and had better feed efficiency, compared with control groups in previous summary reports, 8,10 we expect a lower response to feeding antimicrobials. 13 Therefore, because control groups in the present study grew considerably faster and had better feed efficiency, compared with control groups in previous summary reports, 8,10 we expect a lower response to feeding antimicrobials.…”

Factors Affecting the Lymphoid Cells in the Small Intestinal Epithelium of the Mouse

“…Thus, in chickens, feeding of penicillin causes no change in the spleen weight but produces a decrease in weight and lymphocyte concentration of the ileocaecal tonsil and conversely an increase in weight and cell con tent of the thymus [G ordon el al., 1958], The same authors also reported that several other antibiotics, at various dosage levels, did not produce as uniform and pronounced changes as penicillin. According to Braude et al [1955], feeding pigs with tetracyclines does not alter the spleen weight, whereas, significant differences have been noted by others [Taylor and H arrington, 1955;Barber et al, 1957]. Similarly, penicillin has been reported to cause an increase in the blood white cell counts of poultry [Glick, 1958], but in calves treated with chlortetracycline, the white cell count decreases [R ussoff et al, 1964], O wen and A llen [1964] and P ritchard et al [1964], found no change in the total or differential leu cocyte counts in calves on antibiotic-supplemented diets.…”

Digestive System

“…The status of longitudinal muscle con traction was not determined, but there was a positive correlation between body height and gut length. Aureomycin causes thinning of the small bowel in pigs (173).…”