title: Intra-species variability in ITS-1 sequences of Haemonchus contortus isolated from goats in West Bengal, India.
abstract: This study evaluated the existence of different genotypes of Haemonchus contortus prevailing among goats in West Bengal, India. These parasites were isolated from the abomasum of goat intestine and the molecular characterization was performed by comparing variation of nucleotide sequences of the internal transcribed spacer 1 (ITS-1) gene region. Single-strand conformation polymorphism (SSCP) analysis of ITS-1 amplified product showed the presence of three distinct conformations both in male and female parasites. The sequence analysis of conformations showed two single nucleotide polymorphisms (SNP) in male parasites at nucleotide positions 106 and 107 and one SNP was detected in female parasites at nucleotide position 157. These nucleotide variations in different isolates did not alter the interior loop structure of the predicted secondary RNA, therefore we believe these variations may not be responsible for any evolutionary changes among conformations.
authors.affiliation: Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 37, West Bengal, India.
authors.forename: S
authors.initials: S
authors.lastname: Bandyopadhyay
authors.affiliation: Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 37, West Bengal, India.
authors.forename: A K
authors.initials: AK
authors.lastname: Bera
authors.affiliation: Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 37, West Bengal, India.
authors.forename: S
authors.initials: S
authors.lastname: Sikdar
authors.affiliation: Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 37, West Bengal, India.
authors.forename: S
authors.initials: S
authors.lastname: De
authors.affiliation: Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 37, West Bengal, India.
authors.forename: S
authors.initials: S
authors.lastname: Das
authors.affiliation: Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 37, West Bengal, India.
authors.forename: T
authors.initials: T
authors.lastname: Rana
authors.affiliation: Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 37, West Bengal, India.
authors.forename: D
authors.initials: D
authors.lastname: Pan
authors.affiliation: Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 37, West Bengal, India.
authors.forename: S
authors.initials: S
authors.lastname: Bandyopadhyay
authors.affiliation: Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 37, West Bengal, India.
authors.forename: D
authors.initials: D
authors.lastname: Bhattacharya
mesh_terms: D000818:Animals; D016000:Cluster Analysis; D018509:DNA, Helminth / Q000737:chemistry / Q000235:genetics; D021903:DNA, Ribosomal Spacer / Q000737:chemistry / Q000235:genetics; D005260:Female; D005838:Genotype; D006041:Goats / Q000469:parasitology*; D006189:Haemonchus / Q000145:classification* / Q000235:genetics* / Q000302:isolation & purification; D007194:India; D007422:Intestines / Q000469:parasitology; D008297:Male; D008969:Molecular Sequence Data; D010802:Phylogeny; D020641:Polymorphism, Single Nucleotide; D018807:Polymorphism, Single-Stranded Conformational; D017422:Sequence Analysis, DNA
chemical_list: D018509:DNA, Helminth; D021903:DNA, Ribosomal Spacer