22 research outputs found

    Use of milk with different fat concentrations as extenders for equine cooled semen

    Get PDF
    Dois experimentos foram realizados para verificar a viabilidade de diluentes para sêmen equino refrigerado. O objetivo do primeiro experimento foi verificar a eficiência do leite UHT integral e semidesnatado, comparado ao leite desnatado. Amostras foram analisadas a fresco e posteriormente diluídas em leite UHT integral, semidesnatado e desnatado. Foram realizados exames de motilidade espermática e vigor, CFDA/PI e HOST pós-diluição (0h), e no sêmen refrigerado a 5 ºC após 24 e 48 horas. Não houve diferença entre os três diluentes, quanto à motilidade espermática (p=0,9880), vigor (p=0,7249), CFDA/PI (p=0,3382) e HOST (p > 0,01). Houve uma diminuição na qualidade do sêmen, no decorrer do tempo (p 0.01). There was a decrease in semen quality over time (p <0.01), regardless of the extender used. It can be stated that in the absence of skimmed UHT milk, semi-skimmed and whole milk can be used since they do not impair the quality of refrigerated semen stored for up to 48 hours. In the second trial the objective was to verify the efficacy of the skim milk compared to commercial extenders (Botusemen® (BS) and Botusemen Special® (BSS)). Soon after semen collection, the samples were diluted with UHT skim milk (LD), Botusemen® (BS) and Botusemen Special® (BSS). Semen analysis followed the same protocol as the first experiment. BSS-cooled semen showed higher HOST and CFDA / PI (p <0.001) in 24h and 48h indicating that BSS diluent promotes increased sperm longevity compared to the others analyzed

    Histomorphometric and vascular changes in equine endometrium after the infusion of conceptus fragments

    Get PDF
    This experiment aimed to verify if the proteins present in a 13th day conceptus induce changes in the equine endometrial ultra-structure, histology, and vascularization, two days after its infusion. Ten healthy cyclic mares were used. Once estrus was confirmed, mares were examined daily to detect ovulation (day 0). After ovulation, mares were examined daily until day seven by transrectal palpation and B-mode and Doppler ultrasonography. In this first cycle, intrauterine biopsies were collected at day seven after ovulation, constituting the Cyclic group (n = 10). In the second cycle, the same mares daily were examined until ovulation was detected. After ovulation, mares were examined daily by transrectal palpation and B-mode and Doppler ultrasonography until day 7. On day 5, after ovulation, fragments from previously collected 13-day-old concepti were infused into the uterus of each mare. Intrauterine biopsies were collected at day 7 in all mares (n = 10), constituting the Fragment group. The percentage of ciliated and flattened cells decreased in the Fragment group. Protruded cells, superficial and intraglandular secretion, glandular lumen and diameter, blood vessel diameter, endometrial vascularization, and immune cells were higher in the Fragment group than in the Cyclic group. In summary, proteins of 13th day equine conceptus fragments infused at day five after ovulation signaled histological and vascular changes in the endometrium at the 7th day after ovulation

    Sperm transport and inflammatory reaction after insemination in mares

    No full text
    Normalmente, após a cobertura ou a inseminação artificial de éguas, ocorre uma endometrite aguda transitória em resposta ao sêmen e bactérias no útero. O objetivo deste estudo foi verificar se o transporte espermático e a intensidade da reação inflamatória uterina, 2h, 4h ou 24h após a inseminação com sêmen resfriado, são influenciados pela concentração espermática na dose inseminante. Para tal, foram utilizadas 192 éguas em cio, com folículo dominante ≥35 mm, sem crescimento bacteriano e livres de PMNs aos exames uterinos complementares. As éguas foram distribuídas aleatoriamente em grupos e inseminadas com 20 ml contendo 100x106 (n=30), 500x106 (n=27) ou 1000x106 (n=31) espermatozóides diluídos em solução de 3 ml de plasma seminal e 17 ml de leite desnatado, refrigerado e armazenado por 18 a 22 horas, ou infundidas com 20 ml de plasma seminal (n=33), ou com 20 ml de leite desnatado (n=38). As éguas foram abatidas duas, quatro ou 24h após as inseminações ou infusões. O grupo controle (n=33) não recebeu nenhum tratamento. Os ovidutos foram separados do útero, sendo útero e ovidutos lavados separadamente com PBS. Uma amostra do lavado de cada oviduto foi examinada para contagem de espermatozóides e uma amostra de cada lavado uterino foi utilizada para contagem de leucócitos. Após as lavagens, foi retirada uma amostra de endométrio para exame histopatológico. As éguas inseminadas e infundidas apresentaram reação inflamatória significativamente maior que as éguas do grupo controle, no decorrer das 24 horas. A reação inflamatória foi significativamente maior nas éguas inseminadas que nas infundidas. A reação inflamatória apresentou correlação com a concentração espermática (r=0,389). O número de éguas apresentando espermatozóides nos ovidutos não foi diferente nos grupos inseminados. Concluiu-se que componentes da dose inseminante provocam uma resposta inflamatória, sendo esta tanto mais severa e de resolução mais rápida, quanto maior for a concentração espermática. Por outro lado, até as quatro horas pós-inseminação, o transporte espermático independe da concentração espermática utilizada.A transitory and acute endometritis normally occurs, after natural breeding or artificial insemination (AI), as an inflammatory reaction against semen and bacteria. The aim of this study was to detect if either the sperm transport, or the intensity of inflammatory reaction 2, 4 and 24 hours after AI with cooled semen, depends on the sperm count in the insemination dose. One hundred and ninety two mares in estrus with dominant follicle =35 mm, free of bacterial growth and without PMNs in uterine smears were used. Mares were randomly assigned to groups and received a 20 ml insemination dose with 100 x106 (n=30), 500 x106 (n=27) or 1000 x106 (n=31) spermatozoa diluted in 3ml seminal plasma and 17ml skim milk, cooled and stored for 18 to 22 h, or a 20 ml seminal plasma (n=33), or a 20 ml skim milk (n=38) uterine infusion, being slaughtered 2, 4 or 24 h later. The control group (n=33) received no treatment. The oviducts were dissected from the uterus and both, uterus and oviducts, were flushed with PBS. A sample from each tubal flush was examined for sperm count and a sample of each uterine flush was examined for leukocytes search and count. After flushes, an endometrial sample was collected for histopathological examination. Inseminated and infused mares showed a significantly greater inflammatory reaction than control group, throughout 24 h. The inflammatory reaction was correlated with sperm count (r=0,389). The number of mares showing sperm in the oviducts was not different among distinct insemination groups. It was concluded that compounds in the insemination dose induce uterine inflammatory response, that is as more intense and faster, as sperm count increases. On the other hand, during the first four hours after insemination, the sperm transport does not depend on sperm count

    Sperm transport and inflammatory reaction after insemination in mares

    No full text
    Normalmente, após a cobertura ou a inseminação artificial de éguas, ocorre uma endometrite aguda transitória em resposta ao sêmen e bactérias no útero. O objetivo deste estudo foi verificar se o transporte espermático e a intensidade da reação inflamatória uterina, 2h, 4h ou 24h após a inseminação com sêmen resfriado, são influenciados pela concentração espermática na dose inseminante. Para tal, foram utilizadas 192 éguas em cio, com folículo dominante ≥35 mm, sem crescimento bacteriano e livres de PMNs aos exames uterinos complementares. As éguas foram distribuídas aleatoriamente em grupos e inseminadas com 20 ml contendo 100x106 (n=30), 500x106 (n=27) ou 1000x106 (n=31) espermatozóides diluídos em solução de 3 ml de plasma seminal e 17 ml de leite desnatado, refrigerado e armazenado por 18 a 22 horas, ou infundidas com 20 ml de plasma seminal (n=33), ou com 20 ml de leite desnatado (n=38). As éguas foram abatidas duas, quatro ou 24h após as inseminações ou infusões. O grupo controle (n=33) não recebeu nenhum tratamento. Os ovidutos foram separados do útero, sendo útero e ovidutos lavados separadamente com PBS. Uma amostra do lavado de cada oviduto foi examinada para contagem de espermatozóides e uma amostra de cada lavado uterino foi utilizada para contagem de leucócitos. Após as lavagens, foi retirada uma amostra de endométrio para exame histopatológico. As éguas inseminadas e infundidas apresentaram reação inflamatória significativamente maior que as éguas do grupo controle, no decorrer das 24 horas. A reação inflamatória foi significativamente maior nas éguas inseminadas que nas infundidas. A reação inflamatória apresentou correlação com a concentração espermática (r=0,389). O número de éguas apresentando espermatozóides nos ovidutos não foi diferente nos grupos inseminados. Concluiu-se que componentes da dose inseminante provocam uma resposta inflamatória, sendo esta tanto mais severa e de resolução mais rápida, quanto maior for a concentração espermática. Por outro lado, até as quatro horas pós-inseminação, o transporte espermático independe da concentração espermática utilizada.A transitory and acute endometritis normally occurs, after natural breeding or artificial insemination (AI), as an inflammatory reaction against semen and bacteria. The aim of this study was to detect if either the sperm transport, or the intensity of inflammatory reaction 2, 4 and 24 hours after AI with cooled semen, depends on the sperm count in the insemination dose. One hundred and ninety two mares in estrus with dominant follicle =35 mm, free of bacterial growth and without PMNs in uterine smears were used. Mares were randomly assigned to groups and received a 20 ml insemination dose with 100 x106 (n=30), 500 x106 (n=27) or 1000 x106 (n=31) spermatozoa diluted in 3ml seminal plasma and 17ml skim milk, cooled and stored for 18 to 22 h, or a 20 ml seminal plasma (n=33), or a 20 ml skim milk (n=38) uterine infusion, being slaughtered 2, 4 or 24 h later. The control group (n=33) received no treatment. The oviducts were dissected from the uterus and both, uterus and oviducts, were flushed with PBS. A sample from each tubal flush was examined for sperm count and a sample of each uterine flush was examined for leukocytes search and count. After flushes, an endometrial sample was collected for histopathological examination. Inseminated and infused mares showed a significantly greater inflammatory reaction than control group, throughout 24 h. The inflammatory reaction was correlated with sperm count (r=0,389). The number of mares showing sperm in the oviducts was not different among distinct insemination groups. It was concluded that compounds in the insemination dose induce uterine inflammatory response, that is as more intense and faster, as sperm count increases. On the other hand, during the first four hours after insemination, the sperm transport does not depend on sperm count

    Use of milk with different fat concentrations as extenders for equine cooled semen

    Get PDF
    Dois experimentos foram realizados para verificar a viabilidade de diluentes para sêmen equino refrigerado. O objetivo do primeiro experimento foi verificar a eficiência do leite UHT integral e semidesnatado, comparado ao leite desnatado. Amostras foram analisadas a fresco e posteriormente diluídas em leite UHT integral, semidesnatado e desnatado. Foram realizados exames de motilidade espermática e vigor, CFDA/PI e HOST pós-diluição (0h), e no sêmen refrigerado a 5 ºC após 24 e 48 horas. Não houve diferença entre os três diluentes, quanto à motilidade espermática (p=0,9880), vigor (p=0,7249), CFDA/PI (p=0,3382) e HOST (p > 0,01). Houve uma diminuição na qualidade do sêmen, no decorrer do tempo (p 0.01). There was a decrease in semen quality over time (p <0.01), regardless of the extender used. It can be stated that in the absence of skimmed UHT milk, semi-skimmed and whole milk can be used since they do not impair the quality of refrigerated semen stored for up to 48 hours. In the second trial the objective was to verify the efficacy of the skim milk compared to commercial extenders (Botusemen® (BS) and Botusemen Special® (BSS)). Soon after semen collection, the samples were diluted with UHT skim milk (LD), Botusemen® (BS) and Botusemen Special® (BSS). Semen analysis followed the same protocol as the first experiment. BSS-cooled semen showed higher HOST and CFDA / PI (p <0.001) in 24h and 48h indicating that BSS diluent promotes increased sperm longevity compared to the others analyzed
    corecore