Indian Journal of Animal Research

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Research Article

Indian Journal of Animal Research, volume 52 issue 12 (december 2018) : 1715-1720

Sequencing and Phylogenetic analysis of vlhA gene from Mycoplasma synoviae field isolates associated with Eggshell apex abnormality

P. Sumitha, K. Sukumar, S. Srivignesh
1Department of Veterinary Microbiology, Veterinary College and Research Institute, Namakkal-637 002, Tamil Nadu, India
Cite article:- Sumitha P., Sukumar K., Srivignesh S. (2018). Sequencing and Phylogenetic analysis of vlhA gene from Mycoplasma synoviae field isolates associated with Eggshell apex abnormality. Indian Journal of Animal Research. 52(12): 1715-1720. doi: 10.18805/ijar.B-3442.

ABSTRACT

Eggshell apex abnormality (EAA) associated with Mycoplasma synoviae is occurring regularly in many commercial layer chicken farms of Tamil Nadu. Choanal cleft swabs were collected from EAA affected poultry farms, subjected for isolation and molecular detection of M. synoviae. Among 16 farms investigated M. synoviae could be isolated in six farms. All the farms were positive for M. synoviae in PCR. Among six isolates three isolates (VC&RI-NKL-SV3, VC&RI-NKL- PV6, VC&RI-NKL-KV2) from severe clinical outbreak were sequenced for vlhA gene and compared with the available sequences from the Gene Bank (NCBI) using multiple sequence alignments software - Clustal Omega and Bio edit programs. Analysis showed that the VC&RI,NKL-SV3 and VC&RI-NKL-KV2 were more similar (94.3%) to each other. Point mutation percentage of isolates VC&RI-NKL-PV6, VC&RI-NKL-SV3 and VC&RI-NKL-KV2 isolates in comparison with reference strain KC506806 were 12, 5.1 and 1.8% respectively. The phylogenetic analysis indicated that the VC&RI-NKL-SV3 and VC&RI-NKL-PV6 were closely evolved with VC&RI-NKL-KV2. VC&RI-NKL-KV2 was closely related to sequence of Mycoplasma synoviae from Brazil.

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