Study of the Pathological Effect of <i>Escherichia coli</i> Endotoxin in Rams

Sokkar, S. M.; Darwiesh, G; Madbooly, A

doi:10.1046/j.1439-0450.2003.00651.x

Cited by 11 publications

(11 citation statements)

References 15 publications

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“…Abnormal sperm, as detected in the animals of this study, can be a consequence of testicular degeneration in cases of mineral deficiencies, high environmental temperature and inflammatory alterations (Van Niekerk and Van Niekerk, 1989;McEntee, 1990;Rege et al, 2000;Sokkar et al, 2003). The animals of this study were submitted to these adverse conditions.…”

Section: Resultsmentioning

confidence: 62%

“…Besides, the animals are exposed to many pathogens, since that the sanitary conditions in these areas are usually very precarious. These are well known factors that interfere with reproductive activity in domestic animals (Palfi et al, 1989;Van Niekerk and Van Niekerk, 1989;Sokkar et al, 2003. Due to the importance of the integrity of the genital organs on reproductive performance of the animals, some studies about genital alterations in rams were performed around the world. An unique study which was held in the Northeast of Brazil detected testicular degeneration, epididymo-orchitis, and testicular hypoplasia in rams that have already presented reproductive problems (Santa Rosa et al, 1990).…”

Section: Introductionmentioning

confidence: 99%

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Pathologic evaluation of testis and epididymis of hairy rams in the semi-arid region of Piaui State

Costa¹,

Silva²,

Nascimento³

2007

Arq. Bras. Med. Vet. Zootec.

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The gross and histological examinations of testis and epididymis of 53 crossbred hairy rams in the semiarid region of Piaui State showed 34 (64.1%) animals with pathologic changes: one animal presented (1.9%) testicle hipoplasia; 35 (66%) degenerative changes, being 13 (24.5%) related to testicular degeneration, three (5.7%) to intraepithelial cysts in the epididymal epithelia and 19 (35.8%) to retention cysts in the epididymis; 11 (20.7%) inflammatory alterations, being five (9.4%) related to epididymitis, four (7.5%) to orchitis and two (3.8%) to spermatic granulomas. The animals with hypoplasic testicle, testicular degeneration and inflammatory alterations were classified as sub-fertile.Keywords: hairy rams, testis, epididymis, pathology RESUMO Os exames macroscópico e microscópico de testículos e epidídimos de 53 ovinos deslanados da região semi-árida do estado do

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Section: Resultsmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Pathologic evaluation of testis and epididymis of hairy rams in the semi-arid region of Piaui State

Costa¹,

Silva²,

Nascimento³

2007

Arq. Bras. Med. Vet. Zootec.

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“…Potential differentials for testicular lesions would include scrotal insulation (fat deposition, hydrocele, hematocele, skin thickening), trauma, infectious causes, immunity alterations, nutritional imbalances, and ingestion of a toxin . There was no history of trauma or infectious cause in the rams and no evidence of scrotal insulation on examinations.…”

Section: Discussionmentioning

confidence: 99%

“…Testicular degeneration has many causes including thermal damage, age related changes, toxins, trauma, and infection . In tropical hair sheep, breed and seasonal temperature changes do affect scrotal circumference and semen quality, but rams are still able to maintain good semen quality throughout the year .…”

Section: Introductionmentioning

confidence: 99%

The prevalence of ultrasonographic abnormalities and histopathologic lesions is high in testes of yearling tropical hair rams

Dascanio

Roberson

Pfent

et al. 2019

Vet Radiology Ultrasound

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Ultrasonography is commonly used to examine testes as part of a breeding soundness examination in sheep, especially, in cases of infertility or when gross testicular abnormalities are present.A descriptive, prospective, prevalence study was conducted to characterize the ultrasonographic, histopathologic, and spermatozoal morphology abnormalities present in a group of yearling tropic hair rams on the island of St. Kitts. Hyperechoic and shadowing abnormalities increased over a 6 month study period. Hyperechoic abnormalities were present in one or both testes in 89% (25/28) of yearling rams and 71% (40/56) of testes at castration. Shadowing abnormalities were present in one or both testes in 46% (13/28) of rams and 34% (19/56) of testes at castration. Shadowing was present more with moderate and severe hyperechoic abnormalities, with few testes in the mild category having any shadowing. As hyperechoic and shadowing abnormalities increased in severity, so did the severity of microscopic lesions including increased interstitial cellularity/fibrosis, interstitial mineralization, seminiferous tubules mineralization (hyperechoic only), and chronic lymphoplasmacytic orchitis. There were no spermatozoal morphologic abnormalities other than an increase in distal cytoplasmic droplets. The study findings detail a pathologic event in this group of yearling rams that has an unknown etiology. Potential causes may include scrotal insulation, trauma, infectious causes, immunity alterations, nutritional imbalances, and ingestion of a toxin.Further studies are required to elucidate the causative agent. K E Y W O R D Sdegeneration, histology, ovine, testicular ultrasound 338

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“…Electronic microscope scanning of sperm has shown adverse effects of gram negative outer membrane (endotoxin) in different parts of spermatozoa such as coiled tail, detachment of acrosome, knobbed acrosome [11], and ultrastructural morphological changes due to sperm immobilization [4,6]. Bacterial contaminations are also dangerous for embryos because they can alter zona pellucida [12].…”

Section: Introductionmentioning

confidence: 99%