Pathogenesis and lesions of swine dysentery induced by artificial methods in early weaned pigs
Moreng, N.T.; Quarles, C.L.; Fagerberg, D.J.; Moeller, D.J.
Veterinary Medicine-Small Animal Clinician 75(12): 1841-1844
1980
ISSN/ISBN: 0042-4889 PMID: 7008329 Document Number: 162667
Groups of ten 6-week-old pigs were given by mouth broth culture or blood agar plate cultures of Treponema hyodysenteriae or frozen material from the colon of pigs artificially infected with the organism. Over a period of 28 days, morbidity was 60% in pigs given plate cultures, and 90% in those given colon scrapings stored at -70 deg C for 21 days. Diarrhoea appeared in an average of 3.5 days in 38% of pigs given scrapings stored at -20 deg C, and in 5.5 days in 90% given scrapings stored at -70 deg . It developed in 6.4 days in pigs given minced whole colon, and in 6.5 days in those given plate or broth cultures. Colon scrapings stored at -70 deg C, and broth cultures of T. hyodysenteriae produced clinical signs most closely resembling those seen in natural outbreaks of swine dysentery.