Short Communication: Effect of subclinical mastitis on reproductive performance of Holstein dairy cows in the Northwest of Spain

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.

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Effect of oral calcium bolus administration on milk production, concentrations of minerals and metabolites in serum, early-lactation health status, and reproductive performance of Holstein dairy cows

New Zealand Veterinary Journal ◽

10.1080/00480169.2018.1432427 ◽

2018 ◽

Vol 66 (3) ◽

pp. 132-137 ◽

Cited By ~ 4

Author(s):

M Jahani-Moghadam ◽

Y Chashnidel ◽

A Teimouri-Yansari ◽

E Mahjoubi ◽

E Dirandeh

Keyword(s):

Health Status ◽

Dairy Cows ◽

Milk Production ◽

Reproductive Performance ◽

Bolus Administration ◽

Early Lactation ◽

Oral Calcium ◽

Holstein Dairy Cows

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Effects of Extruded Linseed and Soybean Dietary Supplementation on Lactation Performance, First-Service Conception Rate, and Mastitis Incidence in Holstein Dairy Cows

Animals ◽

10.3390/ani10030436 ◽

2020 ◽

Vol 10 (3) ◽

pp. 436

Author(s):

Ahmed Dawod ◽

Hamada Ahmed ◽

Reham Abou-Elkhair ◽

Hamed T. Elbaz ◽

Ayman E. Taha ◽

...

Keyword(s):

Fatty Acids ◽

Dairy Cows ◽

Milk Yield ◽

Unsaturated Fatty Acids ◽

Saturated Fatty Acids ◽

Dietary Supplementation ◽

Basal Diet ◽

Conception Rate ◽

Service Conception ◽

Holstein Dairy Cows

This study quantifies the effects of extruded linseed and soybean (ELS) dietary supplementation on milk yield, composition, and fatty acid profiles, as well as first-service conception rate in Holstein dairy cows. Seventy-eight open Holstein dairy cows were divided into two groups: (1) a control, which received a basal diet; and (2) a test group, which received a basal diet supplemented with the ELS (650 g/kg of extruded linseed and 150 g/kg of extruded soybean) at a rate of 100 g/kg. In the ELS group, milk yield per day and solid not fat (SNF) yield increased by 3.26% and 0.88%, respectively, in relation to the control. Percentage milk fat decreased significantly by 1.4% in the ELS group when compared with the control. The ELS supplement resulted in a decrease in saturated fatty acids (SFAs) and an increase in monounsaturated (MUFAs) and polyunsaturated fatty acids (PUFAs) in milk. In conclusion, the supplementation of dairy cow feed with 100 g/kg of ELS increases milk yield and milk unsaturated fatty acids (especially MUFAs and PUFAs). ELS supplementation also causes a decrease in percentage fat and SFA levels but does not affect the first-service conception rate or the incidence rate of mastitis.

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