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Influence of small ruminant lentivirus infection on cheese yield in goats

Published online by Cambridge University Press:  11 December 2014

Dorota Nowicka ,
Michał Czopowicz ,
Emilia Bagnicka ,
Magdalena Rzewuska ,
Nina Strzałkowska  and
Jarosław Kaba
Dorota Nowicka
Affiliation:
Laboratory of Veterinary Epidemiology and Economics, Faculty of Veterinary Medicine, Warsaw University of Life Sciences, Nowoursynowska 159c, 02-776 Warsaw, Poland
Michał Czopowicz
Affiliation:
Laboratory of Veterinary Epidemiology and Economics, Faculty of Veterinary Medicine, Warsaw University of Life Sciences, Nowoursynowska 159c, 02-776 Warsaw, Poland
Emilia Bagnicka
Affiliation:
Institute of Genetics and Animal Breeding, Polish Academy of Sciences, Jastrzębiec, Postępu 1, 05-552 Wólka Kosowska, Poland
Magdalena Rzewuska
Affiliation:
Division of Microbiology, Department of Preclinical Sciences, Faculty of Veterinary Medicine, Warsaw University of Life Sciences, Ciszewskiego 8, 02-786 Warsaw, Poland
Nina Strzałkowska
Affiliation:
Institute of Genetics and Animal Breeding, Polish Academy of Sciences, Jastrzębiec, Postępu 1, 05-552 Wólka Kosowska, Poland
Jarosław Kaba*
Affiliation:
Laboratory of Veterinary Epidemiology and Economics, Faculty of Veterinary Medicine, Warsaw University of Life Sciences, Nowoursynowska 159c, 02-776 Warsaw, Poland
*
*For correspondence; e-mail: [email protected]
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Abstract

Three-year cohort study was carried out to investigate the influence of small ruminant lentivirus (SRLV) infection on cheese yield in goats. For this purpose records of milk yield, milk composition and cheese yield were collected in a dairy goat herd. Cheese yield was recorded as the amount of fresh cheese obtained from 1 kg milk. All goats were serologically tested for SRLV infection twice a year. The analysis included 247 records in total (71 for seropositive and 176 from seronegative individuals) and was carried out with the use of the four-level hierarchical linear model (α = 0·05). SRLV infection proved to be a statistically significant independent factor reducing cheese yield (P = 0·013) – when other covariates were held constant cheese yield was reduced by 4·6 g per each 1 kg milk in an infected goat compared with an uninfected goat. Other statistically significant covariates positively associated with cheese yield were protein contents, fat contents and the 3rd stage of lactation (P < 0·001 for all).

Keywords

Goatmilkcheese yieldCAEV
Type
Research Article
Information
Journal of Dairy Research , Volume 82 , Issue 1 , February 2015 , pp. 102 - 106
Copyright
Copyright © Proprietors of Journal of Dairy Research 2014 

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