dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.contributor | Rehagro | |
dc.contributor | Lab VidaVet | |
dc.contributor | Univ British Columbia | |
dc.date.accessioned | 2018-11-26T17:45:08Z | |
dc.date.available | 2018-11-26T17:45:08Z | |
dc.date.created | 2018-11-26T17:45:08Z | |
dc.date.issued | 2018-03-01 | |
dc.identifier | Theriogenology. New York: Elsevier Science Inc, v. 108, p. 291-296, 2018. | |
dc.identifier | 0093-691X | |
dc.identifier | http://hdl.handle.net/11449/163836 | |
dc.identifier | 10.1016/j.theriogenology.2017.12.025 | |
dc.identifier | WOS:000424732900037 | |
dc.identifier | WOS000424732900037.pdf | |
dc.description.abstract | The objective of this study was to assess the impact of mastitis-causing bacteria and somatic cell count (SCC) on pregnancy per embryo transfer (P/ET) in Holstein-Gir crossbred (Girolando) lactating dairy cows. Cows (n = 1397) were subjected to a timed-embryo transfer protocol. Milk samples were collected two days before embryo transfer for SCC and bacteriological culture analyses. Pregnancy diagnosis was performed on days 31 and 66 after timed-embryo transfer. The animals were grouped according to the National Mastitis Council recommendations: Gram-positive environmental (EV+), Gram-negative environmental (EV-), Gram-positive contagious (C+), coagulase-negative staphylococci (CNS) and control (no bacterial growth). Additional analysis was made by categorizing bacteria based on degree of pathogenicity (Major or Minor). Bacterial growth reduced P/ET (P < .01) at both 31 and 66 days of gestation. The P/ET was lower (P < .05) at 31 days in EV- (30.1%) and EV+ (29.9%) groups and tended (P = .09) to be lower in the C+ group (36.6%) than the control group (44.0%). The P/ET from the Major group at 31 days of gestation was lower (P = .03) compared with the Minor and control groups (32.1 vs 41.1 vs 43.2%, respectively). Cows with SCC > 400,000 cells/mL had lower P/ET (P < .01) than animals with SCC < 200,000 cells/mL at both 31 (30.4% vs 40.8%) and 66 days (24.7% vs 32.2%) of gestation. Pregnancy loss was not different between bacterial isolates and SCC categories. Elevated SCC significantly reduced P/ET, whereas environmental agents and those with Major pathogenicity yielded the greatest reduction in NET. (C) 2017 Elsevier Inc. All rights reserved. | |
dc.language | eng | |
dc.publisher | Elsevier B.V. | |
dc.relation | Theriogenology | |
dc.rights | Acesso aberto | |
dc.source | Web of Science | |
dc.subject | Embryo transfer | |
dc.subject | Fertility | |
dc.subject | Intramammary infection | |
dc.subject | Mastitis | |
dc.subject | Somatic cell count | |
dc.title | Somatic cell count and type of intramammary infection impacts fertility from in vitro produced embryo transfer | |
dc.type | Artículos de revistas | |