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Title: Effects on goat milk quality of the presence of mycoplasma spp. in herds without symptoms of contagious agalactia
Authors: De La Fe, Christian
Sánchez, Antonio
Gutierrez, Aldo
Contreras, Antonio
Carlos Corrales, Juan
Assuna̧ao, Patricia
Poveda Turrado, Carlos Guillermo 
Poveda Guerrero, José Bismarck 
UNESCO Clasification: 310905 Microbiología
310907 Patología
Keywords: Mycoplasma spp.
Endemic area
Bulk tank milk quality
Issue Date: 2009
Publisher: 0022-0299
Journal: Journal of Dairy Research 
Abstract: This study was designed to assess the possible effects of mycoplasmas on the quality of milk produced by goat herds in a contagious agalactia (CA) endemic area with absence of classical symptoms. Several factors related to milk quality (percentages of fat, total protein, lactose and total solids, standard plate counts (SPC) and presence of Staphylococcus aureus) were compared in mycoplasma-infected and non-infected herds. To define the CA status of 26 herds on the island of Lanzarote (Spain), where CA is endemic, 570 individual milk samples and 266 bulk tank milk (BTM) samples were microbiologically analysed for the presence of Mycoplasma spp. A herd was considered infected by mycoplasmas when at least a sample (individual or BTM) was positive. BTM samples were also used to determine milk quality parameters. Mycoplasma infection was confirmed in 13 herds. A total of 31, 10 and 11 strains of Mycoplasma mycoides subsp. mycoides LC (MmmLC), Mp. agalactiae and Mp. capricolum subsp. capricolum were isolated. No significant differences were observed between the least square means of the variables fat, total protein, lactose and total solids or SPC recorded for the infected v. non-infected herds. The Staph. aureus status of a herd was also found to be independent of the presence of Mycoplasma spp. Our findings indicate that neither the presence of mycoplasmas in a goat herd with absence of classical symptoms seem to compromise the quality of the BTM.
ISSN: 0022-0299
DOI: 10.1017/S002202990800366X
Source: Journal of Dairy Research[ISSN 0022-0299],v. 76, p. 20-23
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