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Abstract
<i>Mycoplasma leachii</i>sp. nov. in Calves, China
Highlights
Strains of M. leachii that cause mastitis and polyarthritis in cattle are serologically distinct from other bovine Mycoplasma spp
The presence of M. leachii in joint fluids and Mycoplasma spp.– positive cultures was detected by PCR with the partial lppA gene amplified with a protocol modified from the method described by Frey et al [10] and amplification of the complete 16S rRNA gene was performed by using the primers 16S-upper 5 ′ - A A A AT GAGAGTTTG AT C C TGG-3′ and 16S-lower 5′-AGAAAG GAGGTGATCCATCCG-3′
For 16S rRNA gene, the isolates shared 99.9%, 99.9%, and 99.7% nt identities to M. leachii PG50, M. capricolum subsp. capricolum, and M. mycoides subsp. mycoides small colony, respectively
Summary
Bovine group 7 [1], was initially isolated from joint fluids of arthritic calves in southern Queensland, Australia, and its pathogenicity was established by experimental infection [2]. M. leachii was reported infrequently as a cause of polyarthritis in calves and mastitis in cows; the pathogen was isolated from aborted fetuses and pneumonic bovine lungs [3,4,5,6] and from small ruminant hosts [7]. Strains of M. leachii that cause mastitis and polyarthritis in cattle are serologically distinct from other bovine Mycoplasma spp.
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