Show simple item record

dc.contributor.advisorJiménez-Cabán, Esbal
dc.contributor.authorGuzmán-Rivera, Amaris
dc.date.accessioned2018-11-20T20:53:32Z
dc.date.available2018-11-20T20:53:32Z
dc.date.issued2014
dc.identifier.urihttps://hdl.handle.net/20.500.11801/1423
dc.description.abstractReproductive efficiency in dairy herds is affected by environmental, genetic, management and health factors. Endometritis is one of the causes associated with low female reproductive efficiency. This study evaluated the prevalence of sub-clinical endometritis (SE) in three dairy herds in Puerto Rico. In cows averaging 45 ± 7 days post-partum, SE (defined as the presence of ≥5% of polymorphonuclear cells), was determined in two seasons (hot and cool) by endometrial cytology. The overall prevalence of ES (n = 101 cows) was 8.9% and it was not affected by breed (P = 0.73), season (P = 0.34), number of lactations (P = 0.60), nor the farm location (P = 0.56). For Holsteins (n=54), Brown Swiss (n=16), Jersey (n=22) and crossbreds (n=16) the prevalence of SE was 10.4, 18.7, 0 and 6.3%, respectively. Primiparous cows (n=43) showed a value of 7.1% and multiparous (n=65) was 10.2%. The prevalence of SE was 6.1% (n=55) during the hot versus 11.5% (n=53) during the cool season. As for location, in Moca, Lajas and Camuy showed value of 5.5, 6.6 and 12.0%, respectively. Compared to finding from other countries, the present results indicate a relatively low prevalence of SE in this sample of dairy herds in Puerto Rico.
dc.description.abstractLa eficiencia reproductiva en hatos lecheros se ve afectada por factores de ambiente, genética, manejo y salud. La endometritis es una de las causas asociadas con baja eficiencia reproductiva femenina. Esta investigación evaluó la prevalencia en promedio de endometritis sub-clínica (ES) en tres hatos lecheros de Puerto Rico. En vacas de 45±7 días post-parto, se diagnosticó por citología endometrial la ES (definiendo ésta como la presencia de ≥5% de células polimorfo nucleares), en dos épocas del año (calor y fresca). La prevalencia general de ES (n=101 vacas) fue 8.9% y no se afectó por la raza (P= 0.73), época (P=0.34), número de lactancias (P=0.60), ni por la localidad de la finca (P=0.56). Las vacas Holstein (n=54), Brown Swiss (n=16), Jersey (n=22) y cruces (n=16) registraron valores de ES de 10.4, 18.7, 0 y 6.3%, respectivamente. Vacas primíparas (n=43) mostraron un 7.1% de diagnosis positiva y las multíparas (n=65) de 10.2%. La prevalencia de ES fue de 6.1% en época de calor (n=55) versus 11.5% en época fresca (n=53). Las vaquerías ubicadas en Moca, Lajas y Camuy tuvieron valores de 5.5, 6.6 y 12.0%, respectivamente. En comparación a estudios en otros países, los resultados presentes demuestran una relativa baja tasa de ES en este muestreo de hatos lecheros de Puerto Rico.
dc.language.isoesen_US
dc.subjectEndometritisen_US
dc.subjectHatos lecherosen_US
dc.titlePrevalencia de endometritis sub-clínica post-parto en tres hatos lecheros de Puerto Ricoen_US
dc.typeThesisen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2014 Amaris Guzmán Rivera.en_US
dc.contributor.committeeMesonero, Alexander
dc.contributor.committeeSánchez Rodríguez, Héctor L.
dc.contributor.committeeLatorre Acevedo, José R.
dc.contributor.representativeGregory Crespo, Alexandra
thesis.degree.levelM.S.en_US
thesis.degree.disciplineAnimal Industryen_US
dc.contributor.collegeCollege of Agricultural Sciencesen_US
dc.contributor.departmentDepartment of Animal Scienceen_US
dc.description.graduationSemesterFallen_US
dc.description.graduationYear2014en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

  • Theses & Dissertations
    Items included under this collection are theses, dissertations, and project reports submitted as a requirement for completing a graduate degree at UPR-Mayagüez.

Show simple item record

All rights reserved
Except where otherwise noted, this item's license is described as All Rights Reserved