1887

Abstract

With more than 120 species, the genus is one of the largest taxa in the class , a group of micro-organisms that are characterized by apparent simplicity and to which important animal pathogens belong. is the most frequently identified pathogenic in cattle; however, the prevalence of other species living in calves’ airways is poorly understood. The aim of this work was to characterize the respiratory tract mycoplasma populations in calves on one of the largest dairy farms in Italy using a real-time PCR assay and a DNA microarray assay.

A total of 49 nasal swabs and 49 trans-tracheal aspirations from non-vaccinated veal calves were analysed. Genomic DNA was extracted from the samples and then tested using a real-time PCR targeting the gene of and a DNA microarray that was able to identify more than 70 species.

Forty-two out of 49 calves tested positive for spp. (85.7 %). None of the samples tested positive for . A majority (73.5 %) of the 98 samples tested positive for , while 8 samples tested positive for (8.2 %).

Our results expand our knowledge regarding the diversity of populations in the respiratory airways of very young veal calves and add data regarding prevalence in the Italian cattle population. However, the importance of these species in the respiratory diseases of calves still remains to be determined.

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2017-09-01
2020-01-20
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