Parasites, Hosts and Diseases

"Surapol Sanguankiat"

Original Article

Intestinal Parasitic Infections and Environmental Water Contamination in a Rural Village of Northern Lao PDR: Alexis Ribas, Chlo? Jollivet, Serge Morand, Boupha Thongmalayvong, Silaphet Somphavong, Chern-Chiang Siew, Pei-Jun Ting, Saipin Suputtamongkol, Viengsaene Saensombath, Surapol Sanguankiat, Boon-Huan Tan, Phimpha Paboriboune, Kongsap Akkhavong, Kittipong Chaisiri; Korean J Parasitol 2017;55(5):523-532.
Published online October 31, 2017; DOI: https://doi.org/10.3347/kjp.2017.55.5.523

Abstract
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A field survey studying intestinal parasites in humans and microbial pathogen contamination at environment was performed in a Laotian rural village to identify potential risks for disease outbreaks. A parasitological investigation was conducted in Ban Lak Sip village, Luang Prabang, Lao PDR involving fecal samples from 305 inhabitants as well as water samples taken from 3 sites of the local stream. Water analysis indicated the presence of several enteric pathogens, i.e., Aeromonas spp., Vibrio spp., E. coli H7, E. coli O157: H7, verocytotoxin-producing E. coli (VTEC), Shigella spp., and enteric adenovirus. The level of microbial pathogens contamination was associated with human activity, with greater levels of contamination found at the downstream site compared to the site at the village and upstream, respectively. Regarding intestinal parasites, the prevalence of helminth and protozoan infections were 68.9% and 27.2%, respectively. Eight helminth taxa were identified in fecal samples, i.e., 2 tapeworm species (Taenia sp. and Hymenolepis diminuta), 1 trematode (Opisthorchis sp.), and 5 nematodes (Ascaris lumbricoides, Trichuris trichiura, Strongyloides stercoralis, trichostrongylids, and hookworms). Six species of intestinal protists were identified, i.e., Blastocystis hominis, Cyclospora spp., Endolimax nana, Entamoeba histolytica/E. dispar, Entamoeba coli, and Giardia lamblia. Questionnaires and interviews were also conducted to determine risk factors of infection. These analyses together with a prevailing infection level suggested that most of villagers were exposed to parasites in a similar degree due to limited socio-economic differences and sharing of similar practices. Limited access to effective public health facilities is also a significant contributing factor.

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Brief Communication

First Record of Paramphistomes Fischoederius cobboldi and Paramphistomum epiclitum Detected in Bovine Rumen from a Local Market of Savannakhet Province, Lao PDR: Surapol Sanguankiat, Marcello Otake Sato, Megumi Sato, Wanna Maipanich, Tippayarat Yoonuan, Tiengkham Pongvongsa, Boungnong Boupha, Yuichi Chigusa, Kazuhiko Moji, Jitra Waikagul; Korean J Parasitol 2016;54(4):543-547.
Published online August 31, 2016; DOI: https://doi.org/10.3347/kjp.2016.54.4.543

Abstract
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In the present study, we report on the occurrence of paramphistomes, Fischoederius cobboldi and Paramphistomum epiclitum, in Lao PDR with the basis of molecular data. Parasite materials were collected from bovines bred in Ban Lahanam area, Savannakhet Province, Lao PDR at Lahanam public market. Morphological observations indicated 2 different species of paramphistomes. The mitochondrial gene cox1 of the specimens was successfully amplified by PCR and DNA sequencing was carried out for diagnosis of 11 specimens. Pairwise alignment of cox1 sequences were performed and confirmed F. cobboldi and P. epiclitum infecting bovines in Laos. Although there were many limiting points, as the small number of worm samples, and the restricted access of the animal host materials, we confirmed for the first time that 2 species of paramphistomes, F. cobboldi and P. epiclitum, are distributed in Lao PDR. More studies are needed to confirm the paramphistome species present in Savannakhet and its hosts to clear the natural history of these parasites of ruminants in the region and measure the impact of this parasite infection in the life and health of the local people.

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Iman Surya Pratama, Wisnu Nurcahyo, Enade Perdana Istyastono, Triana Hertiani
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Letícia C. Bedin, Philippe V. Alves, Reinaldo J. da Silva
Systematic Parasitology.2024;[Epub] CrossRef
Epidemiology of rumen fluke infection in selected buffalo farms in perak, malaysia: prevalence, molecular species identification, and associated risk factors
Nazir Ahmad Tookhy, Nur-Mahiza Md Isa, Yasmin Abd Rahaman, Nur Indah Ahmad, Reuben Sunil Kumar Sharma, Lokman Hakim Idris, Rozaihan Mansor, Dung Thi Bui, Noor Hazfalinda Hamzah, Shoaib Ahmad Shakhes
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Articles from Symposium on Asian Taenia (October 2011, Osong, Korea)

Genetic Diversity of Taenia asiatica from Thailand and Other Geographical Locations as Revealed by Cytochrome c Oxidase Subunit 1 Sequences: Malinee Thairungroj Anantaphruti, Urusa Thaenkham, Dorn Watthanakulpanich, Orawan Phuphisut, Wanna Maipanich, Tippayarat Yoonuan, Supaporn Nuamtanong, Somjit Pubampen, Surapol Sanguankiat; Korean J Parasitol 2013;51(1):55-59.
Published online February 18, 2013; DOI: https://doi.org/10.3347/kjp.2013.51.1.55

Abstract
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Twelve 924 bp cytochrome c oxidase subunit 1 (cox1) mitochondrial DNA sequences from Taenia asiatica isolates from Thailand were aligned and compared with multiple sequence isolates from Thailand and 6 other countries from the GenBank database. The genetic divergence of T. asiatica was also compared with Taenia saginata database sequences from 6 different countries in Asia, including Thailand, and 3 countries from other continents. The results showed that there were minor genetic variations within T. asiatica species, while high intraspecies variation was found in T. saginata. There were only 2 haplotypes and 1 polymorphic site found in T. asiatica, but 8 haplotypes and 9 polymorphic sites in T. saginata. Haplotype diversity was very low, 0.067, in T. asiatica and high, 0.700, in T. saginata. The very low genetic diversity suggested that T. asiatica may be at a risk due to the loss of potential adaptive alleles, resulting in reduced viability and decreased responses to environmental changes, which may endanger the species.

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Satyendra K. Singh, Kashi N. Prasad, Aloukick K. Singh, Kamlesh K. Gupta, Ranjeet S. Chauhan, Amrita Singh, Avinash Singh, Ravi P. Rai, Binod K. Pati
Parasitology Research.2016; 115(10): 3689. CrossRef
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Anita Ale, Bjorn Victor, Nicolas Praet, Sarah Gabriël, Niko Speybroeck, Pierre Dorny, Brecht Devleesschauwer
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Malinee Thairungroj Anantaphruti
The Korean Journal of Parasitology.2013; 51(1): 37. CrossRef

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Original Article

Haplorchis taichui as a Possible Etiologic Agent of Irritable Bowel Syndrome-Like Symptoms: Dorn Watthanakulpanich, Jitra Waikagul, Wanna Maipanich, Supaporn Nuamtanong, Surapol Sanguankiat, Somchit Pubampen, Rangson Praevanit, Srisuchat Mongkhonmu, Yukifumi Nawa; Korean J Parasitol 2010;48(3):225-229.
Published online September 16, 2010; DOI: https://doi.org/10.3347/kjp.2010.48.3.225

Abstract
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The aim of this study is to clarify the clinical features of Haplorchis taichui infection in humans in Nan Province, Thailand, and to correlate the clinical features with irritable bowel syndrome (IBS)-like symptoms. In this study area, only H. taichui, but neither other minute intestinal flukes nor small liver flukes were endemic. The degree of infection was determined by fecal egg counts and also by collecting adult worms after deworming. The signs and symptoms of individual patients together with their hematological and biochemical laboratory data were gathered to evaluate the relationship between the clinical features and the severity of infection. Special emphasis was made to elucidate the possible similarities of the clinical features of H. taichui infection and IBS-like symptoms. The results showed useful clinical information and the significant (> 50%) proportion of haplorchiasis patients complained of abdominal pain, lassitude, and flatulence, which were the important diagnostic symptoms of IBS. This study has reported a possible link between H. taichui and IBS, and H. taichui might probably play a role in the etiology of these IBS-like symptoms.

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Brief Communication

Egg Laying Capacity of Haplorchis taichui (Digenea: Heterophyidae) in Humans: Megumi Sato, Surapol Sanguankiat, Somchit Pubampen, Teera Kusolsuk, Wanna Maipanich, Jitra Waikagul; Korean J Parasitol 2009;47(3):315-318.
Published online August 28, 2009; DOI: https://doi.org/10.3347/kjp.2009.47.3.315

Abstract
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Quantitative fecal egg counts represented as the number of eggs per gram of feces (EPG) are generally a reliable parameter to estimate the worm burden of intestinal and hepatic parasitoses. Although Haplorchis taichui (Digenea: Heterophyidae) is one of the most common minute human intestinal flukes, little is known about the relationship between EPG and the actual worm burden in patients or the severity of the disease. In the present study, fecal samples were collected from 25 villagers in northern Thailand before and after praziquantel treatment. The EPG values of each participant were determined by the modified cellophane thick smear method, and adult worms were collected from the whole stool after the treatment. Eggs per day per worm (EPDPW) of H. taichui were estimated 82 from egg counts and expelled worms. The EPG was not well correlated with the worm burden, and a reverse correlation was observed between the EPDPW and the worm burden.

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