title: Influence of small ruminant lentivirus infection on cheese yield in goats.
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).
authors.affiliation: Laboratory of Veterinary Epidemiology and Economics,Faculty of Veterinary Medicine,Warsaw University of Life Sciences,Nowoursynowska 159c,02-776 Warsaw,Poland.
authors.forename: Dorota
authors.initials: D
authors.lastname: Nowicka
authors.affiliation: Laboratory of Veterinary Epidemiology and Economics,Faculty of Veterinary Medicine,Warsaw University of Life Sciences,Nowoursynowska 159c,02-776 Warsaw,Poland.
authors.forename: Michał
authors.initials: M
authors.lastname: Czopowicz
authors.affiliation: Institute of Genetics and Animal Breeding, Polish Academy of Sciences,Jastrzębiec,Postępu 1,05-552 Wólka Kosowska,Poland.
authors.forename: Emilia
authors.initials: E
authors.lastname: Bagnicka
authors.affiliation: Division of Microbiology,Department of Preclinical Sciences,Faculty of Veterinary Medicine,Warsaw University of Life Sciences,Ciszewskiego 8,02-786 Warsaw,Poland.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Rzewuska
authors.affiliation: Institute of Genetics and Animal Breeding, Polish Academy of Sciences,Jastrzębiec,Postępu 1,05-552 Wólka Kosowska,Poland.
authors.forename: Nina
authors.initials: N
authors.lastname: Strzałkowska
authors.affiliation: Laboratory of Veterinary Epidemiology and Economics,Faculty of Veterinary Medicine,Warsaw University of Life Sciences,Nowoursynowska 159c,02-776 Warsaw,Poland.
authors.forename: Jarosław
authors.initials: J
authors.lastname: Kaba
mesh_terms: D000818:Animals; D002452:Cell Count; D002611:Cheese; D005223:Fats / Q000032:analysis; D005260:Female; D015511:Goat Diseases / Q000503:physiopathology* / Q000821:virology*; D006041:Goats; D007774:Lactation; D016180:Lentivirus Infections / Q000175:diagnosis / Q000503:physiopathology / Q000662:veterinary*; D008892:Milk / Q000737:chemistry* / Q000166:cytology; D008894:Milk Proteins / Q000032:analysis
chemical_list: D005223:Fats; D008894:Milk Proteins
keywords: CAEV; Goat; cheese yield; milk