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Pathological Conditions of the Reproductive Organs of Male Stray Dogs in the Tropics: Prevalence, Risk Factors, Morphological Findings and Testosterone Concentrations
- Source :
- Reproduction in Domestic Animals. 41:429-437
- Publication Year :
- 2006
- Publisher :
- Wiley, 2006.
-
Abstract
- The objective of this study was to estimate the prevalence of and risk factors for pathological conditions of the reproductive organs in stray dogs under tropical conditions. Three hundred and eighteen dogs were examined post-mortem in the period from 1 July 2002 to 30 June 2003. Before killing, a blood sample (from the cephalic vein) for testosterone assay was taken. Pathological conditions of the reproductive organs were found in 135 of the dogs (42.5%) and in 175 of the testes (64.8%). The most frequent pathologies found were testicular degeneration, cryptorchidism, testicular hypoplasia and testicular tumours (in 15.1%, 6.6%, 6.6% and 5.4% of the dogs and 15.1, 4.6, 6.0 and 3.5 of the testes, respectively). Transmissible venereal tumour (TVT) was seen in 5.4% of the dogs. Testicular degeneration was more common in old dogs and underweight dogs (p < 0.05). Testicular tumours were 14.3 times more common in cryptorchid dogs. Age was another important factor for the development of testicular tumours (p < 0.05). Lower levels of testosterone concentration (p < 0.05) were observed in dogs with advanced testicular degeneration (0.7 +/- 0.8 nM), dogs with hypoplastic testicles (0.8 +/- 0.9 nM) and dogs with one degenerated and one retained testis or with bilateral cryptorchidism (1.2 +/- 0.9 nM) compared to dogs with one or two normal testes (7.0 +/- 5.5 nM). Testicular volume and weight were significantly lower in degenerated, hypoplastic and retained testes compared with the contralateral normal testis. Some spermatogenic activity was found in three of the retained testes, producing oligozoospermic smears with a high percentage of sperm abnormalities. No comparable epidemiological data about male pathological conditions of the reproductive organs in the dog is available. The prevalence found in this study, yet, appears high.
- Subjects :
- Male
medicine.medical_specialty
medicine.drug_class
Physiology
Biology
Testicular Diseases
Dogs
Endocrinology
Testicular Neoplasms
Risk Factors
Internal medicine
Cryptorchidism
Prevalence
medicine
Carnivora
Animals
Testosterone
Dog Diseases
Risk factor
Mexico
Pathological
Tropical Climate
Fissipedia
Age Factors
Androgen
biology.organism_classification
Spermatozoa
Sperm
Animal Science and Zoology
Underweight
medicine.symptom
Biotechnology
Subjects
Details
- ISSN :
- 14390531 and 09366768
- Volume :
- 41
- Database :
- OpenAIRE
- Journal :
- Reproduction in Domestic Animals
- Accession number :
- edsair.doi.dedup.....ac47bbab68686b87b5da33bcfdf8adc8