Open AccessShort communication: Effect of subclinical mastitis on reproductive performance of Holstein dairy cows in the Northwest of Spain
Author(s) -
Hafez Sadeghi,
Uxía Yáñez,
Ana I. de Prado Taranilla,
Faramarz Gharagozlou,
Juan José Becerra González,
Pedro J. García Herradón,
Ana Isabel Peña Martínez,
Luis Ángel Quintela Arias
Publication year - 2021
Publication title -
spanish journal of agricultural research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.337
H-Index - 36
eISSN - 2171-9292
pISSN - 1695-971X
DOI - 10.5424/sjar/2021194-18058
Subject(s) - somatic cell count , artificial insemination , herd , dairy cattle , mastitis , zoology , pregnancy , subclinical infection , population , biology , logistic regression , insemination , medicine , lactation , ice calving , environmental health , genetics , microbiology and biotechnology
Aim of study: To investigate the effect of subclinical mastitis (SCM) before and after first artificial insemination (AI), characterized by a somatic cell count (SCC) higher than 200×103 cell/mL, on reproductive performance including first service conception rate (FSCR) and pregnancy loss (PL) in Holstein dairy cows. Area of study: The central area of Lugo, Galicia, Spain. Material and methods: This retrospective study was conducted on herd database of a population of 80 commercial Holstein dairy cow farms. A total number of 2053 lactations were included in this study. A binary logistic regression was carried out to analyse all data. Main results: The results of this study indicated that cows that registered a SCC lower than 200×103 cell/mL within 30 days after first AI were more likely to conceive pregnancy than cows with a higher SCC (31.2% and 25.1% FSCR, respectively; OR=1.285, 95% CI=1.000-1.653). Additionally, an increased SCC neither 30 days before nor 30 days after first AI had a negative effect on prevalence of PL in dairy cows. Research highlights: These findings revealed that SCM within 30 days after first AI negatively affected FSCR, whilst 30 days before first AI did not affect it. Therefore, it could be suggested that preventing subclinical mastitis after first AI, during a critical period of 30 days, is important to maximize the reproductive performance of dairy cows.