Redescription and new record of Paracapillaria (Ophidiocapillaria) najae (Nematoda: Trichuroidea) in the monocled cobra Naja kaouthia from central Thailand: Morphological and molecular insights
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Issued Date
2023-01-01
Resource Type
ISSN
00311820
eISSN
14698161
Scopus ID
2-s2.0-85167452458
Pubmed ID
37519244
Journal Title
Parasitology
Rights Holder(s)
SCOPUS
Bibliographic Citation
Parasitology (2023)
Suggested Citation
Charoennitiwat V., Chaisiri K., Ampawong S., Laoungbua P., Chanhome L., Vasaruchapong T., Tawan T., Thaenkham U., Ratnarathorn N. Redescription and new record of Paracapillaria (Ophidiocapillaria) najae (Nematoda: Trichuroidea) in the monocled cobra Naja kaouthia from central Thailand: Morphological and molecular insights. Parasitology (2023). doi:10.1017/S0031182023000707 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/88360
Title
Redescription and new record of Paracapillaria (Ophidiocapillaria) najae (Nematoda: Trichuroidea) in the monocled cobra Naja kaouthia from central Thailand: Morphological and molecular insights
Other Contributor(s)
Abstract
The parasitic nematode Paracapillaria (Ophidiocapillaria) najae De, 1998, found in the Indian cobra Naja naja is redescribed and re-illustrated in the present study. The monocled cobra Naja kaouthia was discovered to be a new host for this parasite in central Thailand. A comprehensive description extending the morphological and molecular characteristics of the parasites is provided to aid species recognition in future studies. The morphometric characters of 41 parasites collected from five cobra specimens are compared with those described in the original studies. Phylogenetic analyses using mitochondrial cytochrome c oxidase subunit 1 and nuclear 18S ribosomal RNA genes were performed to provide novel information on the systematics of P. najae. Similar characteristics were observed in the examined nematode samples, despite being found in different hosts, confirming their identity as P. najae. The molecular genetic results support the species status of P. najae, indicating P. najae is well defined and separated from other related nematode species in the family Capillariidae. Morphological descriptions, genetic sequences, evolutionary relationships among capillariids, and new host and distribution records of P. najae are discussed. P. najae specimens found in the Thai cobra had some morphological variation, and sexual size dimorphism was also indicated. P. najae was found to infect various cobra host species and appeared to be common throughout the Oriental regions, consistent with its hosts' distribution.