Occurrence of Gastrointestinal Parasites in Fecal Samples from Free-Grazing Ducks in Northeastern Thailand.
5 affiliations
- 1Faculty of Medicine, Mahasarakham University, Maha Sarakham 44000, Thailand.
- 2Biomedical Science Research Unit, Mahasarakham University, Maha Sarakham 44000, Thailand.
- 3Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.
- 4Mekong Health Science Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand.
- 5Division of Cell Biology, Department of Preclinical Sciences, Faculty of Medicine, and Center of Excellence in Stem Cell Research and Innovation, Thammasat University, Rangsit Campus, Pathum Thani 12120, Thailand.
Abstract
Intestinal parasitic infections remain a persistent concern in tropical agricultural systems, where close interactions among animals, humans, and the environment facilitate parasite transmission. Free-grazing ducks, commonly raised in rice-field ecosystems in Thailand, may be exposed to a wide range of intestinal parasites. This cross-sectional study examined 312 fecal samples collected from five selected free-grazing duck flocks in northeastern Thailand from October to November 2025. All fecal samples were examined using the modified formalin-ethyl acetate concentration technique. Parasites were identified based on egg and larval morphology. Positive parasite detections were found in 168 samples, yielding an overall percentage of positive fecal samples (%PFS) of 53.8%. The %PFS across the five provinces ranged from 42.5% to 63.5%. Among the positive fecal samples, the most frequently detected parasites were unidentified nematodes (38.1%), trichurid-like eggs (30.3%), strongyle-type eggs (25.0%), echinostome-like eggs (21.4%), and Ascaridia spp. (18.4%). Among the positive samples, small operculated trematode (SOT) and hymenolepidid-like eggs were detected in 3.0% and 1.2%, respectively; however, these findings may represent spurious passage. Single morphotype detection predominated, while co-detection of multiple morphotypes occurred less frequently. These findings document a diverse assemblage of intestinal parasite morphotypes in fecal samples from free-grazing ducks in northeastern Thailand, potentially reflecting exposure through aquatic and soil-associated routes.
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BibTeX
@article{kuasit2026occurrence,
title = {{Occurrence of Gastrointestinal Parasites in Fecal Samples from Free-Grazing Ducks in Northeastern Thailand.}},
author = {Teputid Kuasit and Tongjit Thanchomnang and Jitsuda Kullawat and Sujittra Yahom and Siriporn Kuanamon and Wanchai Maleewong and Weerachai Saijuntha and Chairat Tantrawatpan},
journal = {Biology},
year = {2026},
month = sep,
doi = {10.3390/biology15191719},
url = {https://europepmc.org/article/MED/42883392},
note = {CC BY},
}
RIS
TY - JOUR
TI - Occurrence of Gastrointestinal Parasites in Fecal Samples from Free-Grazing Ducks in Northeastern Thailand.
AU - Teputid Kuasit
AU - Tongjit Thanchomnang
AU - Jitsuda Kullawat
AU - Sujittra Yahom
AU - Siriporn Kuanamon
AU - Wanchai Maleewong
AU - Weerachai Saijuntha
AU - Chairat Tantrawatpan
PY - 2026
DA - 2026/09/30
JO - Biology
DO - 10.3390/biology15191719
UR - https://europepmc.org/article/MED/42883392
AB - Intestinal parasitic infections remain a persistent concern in tropical agricultural systems, where close interactions among animals, humans, and the environment facilitate parasite transmission. Free-grazing ducks, commonly raised in rice-field ecosystems in Thailand, may be exposed to a wide range of intestinal parasites. This cross-sectional study examined 312 fecal samples collected from five selected free-grazing duck flocks in northeastern Thailand from October to November 2025. All fecal samples were examined using the modified formalin-ethyl acetate concentration technique. Parasites were identified based on egg and larval morphology. Positive parasite detections were found in 168 samples, yielding an overall percentage of positive fecal samples (%PFS) of 53.8%. The %PFS across the five provinces ranged from 42.5% to 63.5%. Among the positive fecal samples, the most frequently detected parasites were unidentified nematodes (38.1%), trichurid-like eggs (30.3%), strongyle-type eggs (25.0%), echinostome-like eggs (21.4%), and Ascaridia spp. (18.4%). Among the positive samples, small operculated trematode (SOT) and hymenolepidid-like eggs were detected in 3.0% and 1.2%, respectively; however, these findings may represent spurious passage. Single morphotype detection predominated, while co-detection of multiple morphotypes occurred less frequently. These findings document a diverse assemblage of intestinal parasite morphotypes in fecal samples from free-grazing ducks in northeastern Thailand, potentially reflecting exposure through aquatic and soil-associated routes.
SN - 2079-7737
ER -