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Scrotal circumference, seminal characteristics, and testicular lesions of yearling Angus bulls.
Am J Vet Res 1988; 49(4):579-85AJ

Abstract

The effect of age and body weight on scrotal circumference (SC), the effect of SC on percentage of sperm abnormalities and seminal characteristics, and the relationship of SC with testicular weight, epididymidal weight, degree of germinal epithelial loss (DGEL), and percentage of tubules graded 4 or greater (G4+) were studied in 37 Angus bulls. All bulls were from one herd and were examined at monthly intervals, during a 140-day weight gain test starting when they were 11 months old. The study was terminated when the bulls were slaughtered at 14 months of age. As age and body weight increased, SC increased (P less than 0.001). The incidence of sperm abnormalities decreased (P less than 0.001) as SC increased; however, seminal characteristics remained poor in bulls with SC less than or equal to 32 cm. Pathologic changes in 600 cross sections of seminiferous tubules from each bull were classified into 9 grades. The DGEL per 100 tubules was calculated by assigning a value to each grade according to the severity of loss of germinal epithelium. Tubules classified as G4+ were devoid of germinal cells and provided an index of irreversible loss of germinal epithelium. The SC was correlated positively with testicular weight (r = 0.91, P less than 0.001) and epididymal weight (r = 0.59, P less than 0.001) and negatively with DGEL (r = -0.48, P less than 0.01) and G4+ (r = -0.44, P less than 0.01).(

ABSTRACT

TRUNCATED AT 250 WORDS)

Authors+Show Affiliations

University of Illinois, College of Veterinary Medicine, Urbana 61801.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

3377321

Citation

Madrid, N, et al. "Scrotal Circumference, Seminal Characteristics, and Testicular Lesions of Yearling Angus Bulls." American Journal of Veterinary Research, vol. 49, no. 4, 1988, pp. 579-85.
Madrid N, Ott RS, Veeramachaneni DN, et al. Scrotal circumference, seminal characteristics, and testicular lesions of yearling Angus bulls. Am J Vet Res. 1988;49(4):579-85.
Madrid, N., Ott, R. S., Veeramachaneni, D. N., Parrett, D. F., Vanderwert, W., & Willms, C. L. (1988). Scrotal circumference, seminal characteristics, and testicular lesions of yearling Angus bulls. American Journal of Veterinary Research, 49(4), pp. 579-85.
Madrid N, et al. Scrotal Circumference, Seminal Characteristics, and Testicular Lesions of Yearling Angus Bulls. Am J Vet Res. 1988;49(4):579-85. PubMed PMID: 3377321.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Scrotal circumference, seminal characteristics, and testicular lesions of yearling Angus bulls. AU - Madrid,N, AU - Ott,R S, AU - Veeramachaneni,D N, AU - Parrett,D F, AU - Vanderwert,W, AU - Willms,C L, PY - 1988/4/1/pubmed PY - 1988/4/1/medline PY - 1988/4/1/entrez SP - 579 EP - 85 JF - American journal of veterinary research JO - Am. J. Vet. Res. VL - 49 IS - 4 N2 - The effect of age and body weight on scrotal circumference (SC), the effect of SC on percentage of sperm abnormalities and seminal characteristics, and the relationship of SC with testicular weight, epididymidal weight, degree of germinal epithelial loss (DGEL), and percentage of tubules graded 4 or greater (G4+) were studied in 37 Angus bulls. All bulls were from one herd and were examined at monthly intervals, during a 140-day weight gain test starting when they were 11 months old. The study was terminated when the bulls were slaughtered at 14 months of age. As age and body weight increased, SC increased (P less than 0.001). The incidence of sperm abnormalities decreased (P less than 0.001) as SC increased; however, seminal characteristics remained poor in bulls with SC less than or equal to 32 cm. Pathologic changes in 600 cross sections of seminiferous tubules from each bull were classified into 9 grades. The DGEL per 100 tubules was calculated by assigning a value to each grade according to the severity of loss of germinal epithelium. Tubules classified as G4+ were devoid of germinal cells and provided an index of irreversible loss of germinal epithelium. The SC was correlated positively with testicular weight (r = 0.91, P less than 0.001) and epididymal weight (r = 0.59, P less than 0.001) and negatively with DGEL (r = -0.48, P less than 0.01) and G4+ (r = -0.44, P less than 0.01).(ABSTRACT TRUNCATED AT 250 WORDS) SN - 0002-9645 UR - https://www.unboundmedicine.com/medline/citation/3377321/Scrotal_circumference_seminal_characteristics_and_testicular_lesions_of_yearling_Angus_bulls_ DB - PRIME DP - Unbound Medicine ER -