Amount and distribution of vestibular-associated lymphoid tissue in calves and adult cows.
Normal reproductive tracts were obtained from 11 adult cows, five eight-week-old and five six-week-old heifer calves. Lymphoid nodules and aggregations (loci) were localised in vestibules by immersion in 2 per cent acetic acid. Adults had significantly more loci (P less than 0.001) than eight- or six-week-old calves, there being means of 194.6, 44.2 and 7.4 loci per vestibule, respectively. In all age groups there was a greater concentration (number cm-2) of loci along the median ventral groove than the side walls (P less than 0.001), and in the caudal third of the vestibule than in the middle or cranial thirds (P less than 0.001). The concentrations of loci were the same in adults and eight-week-old calves but significantly lower in six-week-old calves (P less than 0.01).
Department of Animal Husbandry, School of Veterinary Science, University of Bristol, Langford.
N B
NB
Blazquez
E H
EH
Batten
S E
SE
Long
G C
GC
Perry
D000375:Aging; D000818:Animals; D002417:Cattle / Q000033:anatomy & histology*; D005260:Female; D005836:Genitalia, Female / Q000033:anatomy & histology*; D008221:Lymphoid Tissue / Q000033:anatomy & histology*