Bacterial identification using PCR-DGGE in milk of mastitic cows from a herd of crossbreed GYR-Holstein

Municipio Obispo Ramos de Lora, Merida. Venezuela

Authors

  • Datty Rosales-Zambrano, Msc. Veterinary Advance Technologies. Ejido. Mérida Venezuela
  • Yzoleth Torres-Vielma, Msc. Universidad de los Andes, Venezuela
  • Agustina Rojas-Estaba, Msc. Universidad de los Andes, Venezuela
  • Ana María Bolivar, Msc. Universidad de los Andes, Venezuela
  • José David Rosales, Lic. Universidad Nacional Experimental Simón Rodríguez, Venezuela
  • Evelyn Alviarez Alviarez, Lic. Universidad de los Andes, Venezuela
  • Pablo García-Lugo, Msc. Universidad de los Andes, Venezuela

Keywords:

bacteria, mastitis, negative culture, PCR-DGGE

Abstract

In order to characterize the composition of bacteria in samples of milk from crossbreed Gyr–Holstein cows affected with mastitis, from a herd with a history of clinical mastitis from six months ago and low milk production, a culture-independent  PCR - DGGE technique using as a marker the V3 region 16S rDNA was carried out. The assessment of sub clinical mastitis was performed by CMT. Samples were taken from cows that had a least 4 weeks without antibiotic therapy, and aliquots were used for bacteriology and molecular identification. Only culture negative samples were selected for PCR - DGGE. The level of sub clinical mastitis by CMT at the moment of sampling was 48.07 % (225 quarter). PCR-DGGE, revealed the presence of several types of bacteria in the samples studied, which were more closely related to bacteria of the Firmicutes and Proteobacteria phylum, which highlight the presence of the genus Acinetobacter. Most of these microorganisms are involved in antibiotic multi-resistance, so the technique becomes a useful tool for analyzing these microbial populations in cows with clinical mastitis and negative culture and establish better recommendations for control and prevention of this pathology in dairy farms. Others researches are needed to determine the implications of microorganisms isolated in this work over animal and human health.

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Author Biographies

Datty Rosales-Zambrano, Msc., Veterinary Advance Technologies. Ejido. Mérida Venezuela

Venezolana. Médico Veterinario. Estudiante de Doctorado. Biotecnología de Microorganismos. Edif Sixto David Rojo. Universidad de los Andes (ULA). La Hechicera. Mérida. Venezuela. Veterinary Advance Technologies. Ejido. Mérida Venezuela

Yzoleth Torres-Vielma, Msc., Universidad de los Andes, Venezuela

Venezolana. Médico Veterinario. Estudiante de Doctorado. Biotecnología de Microorganismos. Edif Sixto David Rojo. Universidad de los Andes (ULA). La Hechicera. Mérida. Venezuela.

Agustina Rojas-Estaba, Msc., Universidad de los Andes, Venezuela

Venezolana. Médico Veterinario. Estudiante de Doctorado. Biotecnología de Microorganismos. Edif Sixto David Rojo. Universidad de los Andes (ULA). La Hechicera. Mérida. Venezuela.

Ana María Bolivar, Msc., Universidad de los Andes, Venezuela

Venezolana. Médico Veterinario. Estudiante de Doctorado. Biotecnología de Microorganismos. Edif Sixto David Rojo. Universidad de los Andes (ULA). La Hechicera. Mérida. Venezuela.

José David Rosales, Lic., Universidad Nacional Experimental Simón Rodríguez, Venezuela

Venezolano. Biólogo. IDECYT-Universidad Nacional Experimental Simón Rodríguez. Sector El Cují, Estado Miranda, Venezuela

Evelyn Alviarez Alviarez, Lic., Universidad de los Andes, Venezuela

Venezolana.  Farmaceútico. Departamento de Microbiología. Facultad de Farmacia y Bioanálisis. Universidad de los Andes. Mérida. Venezuela

Pablo García-Lugo, Msc., Universidad de los Andes, Venezuela

Venezolano. Médico Veterinario. Estudiante de Doctorado. Biotecnología de Microorganismos. Edif Sixto David Rojo. Universidad de los Andes (ULA). La Hechicera. Mérida. Venezuela.

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Published

2015-06-01

How to Cite

Rosales-Zambrano, D., Torres-Vielma, Y., Rojas-Estaba, A., Bolivar, A. M., Rosales, J. D., Alviarez, E. A., & García-Lugo, P. (2015). Bacterial identification using PCR-DGGE in milk of mastitic cows from a herd of crossbreed GYR-Holstein: Municipio Obispo Ramos de Lora, Merida. Venezuela. Ágora De Heterodoxias, 1(1), 92-103. Retrieved from https://revistas.uclave.org/index.php/agora/article/view/276

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Section

Original articles from researches