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Effects on goat milk quality of the presence of Mycoplasma spp. in herds without symptoms of contagious agalactia

Published online by Cambridge University Press:  16 October 2008

Christian de la Fe ,
Antonio Sánchez ,
Aldo Gutierrez ,
Antonio Contreras ,
Juan Carlos Corrales ,
Patricia Assunçao ,
Carlos Poveda  and
José B Poveda
Christian de la Fe*
Affiliation:
Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de Murcia, Campus de Espinardo s/n. 30100 – Murcia – (Spain)
Antonio Sánchez
Affiliation:
Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de Murcia, Campus de Espinardo s/n. 30100 – Murcia – (Spain)
Aldo Gutierrez
Affiliation:
Cabildo Insular de Lanzarote, Granja Agrícola Experimental, Carretera de Tahíche a San Bartolomé, km 1, 35550 – Arrecife de Lanzarote – (Spain)
Antonio Contreras
Affiliation:
Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de Murcia, Campus de Espinardo s/n. 30100 – Murcia – (Spain)
Juan Carlos Corrales
Affiliation:
Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de Murcia, Campus de Espinardo s/n. 30100 – Murcia – (Spain)
Patricia Assunçao
Affiliation:
Unidad de Epidemiología y Medicina Preventiva, Facultad de Veterinaria, Universidad de Las Palmas de GC, Trasmontaña s/n. 35416 – Arucas – Las Palmas (Spain)
Carlos Poveda
Affiliation:
Unidad de Epidemiología y Medicina Preventiva, Facultad de Veterinaria, Universidad de Las Palmas de GC, Trasmontaña s/n. 35416 – Arucas – Las Palmas (Spain)
José B Poveda
Affiliation:
Unidad de Epidemiología y Medicina Preventiva, Facultad de Veterinaria, Universidad de Las Palmas de GC, Trasmontaña s/n. 35416 – Arucas – Las Palmas (Spain)
*
*For correspondence; e-mail: cdelafe@um.es
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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.

Keywords

Mycoplasma spp.endemic areabulk tank milk quality
Type
Research Article
Information
Journal of Dairy Research , Volume 76 , Issue 1 , February 2009 , pp. 20 - 23
Copyright
Copyright © Proprietors of Journal of Dairy Research 2008

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