Parasites, Hosts and Diseases

"Rhabditis"

Original Articles

Comparison of Functional Gene Annotation of Toxascaris leonina and Toxocara canis using CLC Genomics Workbench: Ki Uk Kim, Sang Kyun Park, Shin Ae Kang, Mi Kyung Park, Min Kyoung Cho, Ho-jin Jung, Kyung-Yun Kim, Hak Sun Yu; Korean J Parasitol 2013;51(5):525-530.
Published online October 31, 2013; DOI: https://doi.org/10.3347/kjp.2013.51.5.525

The ascarids, Toxocara canis and Toxascaris leonina, are probably the most common gastrointestinal helminths encountered in dogs. In order to understand biological differences of 2 ascarids, we analyzed gene expression profiles of female adults of T. canis and T. leonina using CLC Genomics Workbench, and the results were compared with those of free-living nematode Caenorhabditis elegans. A total of 2,880 and 7,949 ESTs were collected from T. leonina and T. canis, respectively. The length of ESTs ranged from 106 to 4,637 bp with an average insert size of 820 bp. Overall, our results showed that most functional gene annotations of 2 ascarids were quite similar to each other in 3 major categories, i.e., cellular component, biological process, and molecular function. Although some different transcript expression categories were found, the distance was short and it was not enough to explain their different lifestyles. However, we found distinguished transcript differences between ascarid parasites and free-living nematodes. Understanding evolutionary genetic changes might be helpful for studies of the lifestyle and evolution of parasites.

Citations

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A Survey of Dung Beetles Infected with Larval Nematodes with Particular Note on Copris lunaris Beetles as a Vector for Gongylonema sp. in Iran: Gholamreza Mowlavi, Elmira Mikaeili, Iraj Mobedi, Eshratbeigom Kia, Lotfali Masoomi, Hassan Vatandoost; Korean J Parasitol 2009;47(1):13-17.
Published online March 12, 2009; DOI: https://doi.org/10.3347/kjp.2009.47.1.13

Abstract
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Dung beetles (family Scarabaeidae) are one of the largest families of beetles worldwide. Due to biological behavior of these arthropods, they are considered to play an important role in the life cycle of some helminths. In the present study, dung beetles collected from cattle pastures in rural areas of Ardabil province, north-west of Iran were examined for infection with larval stages of helminths. According to the results, nematodes of 2 genera were identified including Rhabditis and Gongylonema. The more common species was Rhabditis sp. which was found in 9 species of beetles. Out of 15 different species of dung beetles, Copris lunaris was the only scarabaeid to be found naturally infected with the larval stages of Gongylonema sp. Our new findings introduce C. lunaris as a potential biological vector for transmission of Gongylonema sp. to vertebrates in the surveyed region.

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