ArticleParasites & vectors2018
Molecular detection and genotyping of pathogenic protozoan parasites in raw and treated water samples from southwest Colombia.
Article in Parasites & vectors, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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17 citing papers in PubMed, 38 citations in OpenAlex.
- Multilocus Oxford Nanopore sequencing reveals genetic diversity of Giardia duodenalis and Cryptosporidium spp. in surface and wastewater in Southwestern Colombia.Parasites & vectors · 2026Article
- Waterborne Transmission Driving the Prevalence ofMicroorganisms · 2025Article
- Metagenomic Analysis of Surface Waters and Wastewater in the Colombian Andean Highlands: Implications for Health and Disease.Current microbiology · 2025Article
- Molecular characterization of Giardia duodenalis, Cryptosporidium spp., and Entamoeba spp. infecting domestic and feral/stray cats in Jordan.Parasitology research · 2024Article
- Assessment of the potential occurrence ofJournal of parasitic diseases : official organ of the Indian Society for Parasitology · 2024Article
- Molecular detection and characterization ofInternational journal for parasitology. Parasites and wildlife · 2023Article
- How significant are bats as potential carriers of zoonoticCurrent research in parasitology & vector-borne diseases · 2023Review
- Molecular diagnosis of intestinal protozoa in young adults and their pets in Colombia, South America.PloS one · 2023Article
- Detection ofMicroorganisms · 2022Review
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- Cryptosporidiosis outbreak in Amazonia, French Guiana, 2018.PLoS neglected tropical diseases · 2022Article
- Molecular characterization of Cryptosporidium spp. obtained from fecal samples of immunosuppressed patients from Brazil.Revista da Sociedade Brasileira de Medicina Tropical · 2022Article
- Occurrence and removal of intestinal parasites in two wastewater treatment plants in the south of Morocco.Journal of environmental health science & engineering · 2021Article
- Microbiological assessment of an urban lagoon system in the coastal zone of Rio de Janeiro, Brazil.Environmental science and pollution research international · 2021Article
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- Sulfonamide Inhibition Studies of a New β-Carbonic Anhydrase from the Pathogenic ProtozoanInternational journal of molecular sciences · 2018Article
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Authors and funding
6 authors at 5 institutions in 2 countries.
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Abstract
backgroundProtozoan parasites such as Giardia duodenalis, Cryptosporidium spp., Cyclospora cayetanensis, Toxoplasma gondii and Entamoeba histolytica represent a great challenge to the systems producing water for human consumption because their cystic forms are persistent in the environment and resist to the disinfection methods conventionally used for their control. In this study, we investigated the presence of these protozoan pathogens in both raw and treated water samples used for the production of drinking water in Nariño Department, southwest Colombia. We collected 110 water samples (10 lof each sample) and analyzed them with real-time PCR (qPCR). qPCR-positive samples were genotyped with PCR and DNA sequencing.
resultsGiardia duodenalis was detected in 35/110 (31.8%) of the samples and Cryptosporidium spp. in 9/110 (8.2%) of the samples; no sample was positive for T. gondii, E. histolytica or C. cayetanensis. Giardia duodenalis was detected in samples of both raw water (Drinking Water Treatment Plants (DWTP): 47.83%;Drinking Water Rural Plants (DWRP): 18.42%) and water collected either after conventional physicochemical treatment (26.09%) or after disinfection by chlorine (50%), whereas Cryptosporidium spp. were only detected in raw waters (DWTP: 17.39%; DWRP: 13.16%). The two pathogens were detected in both types of treatment plants supplying water to urban areas and to rural zones. Analysis of gdh and tpi markers identified assemblages AI, AII and H of G. duodenalis, while analysis of the small subunit rRNA and gp60 markers of Cryptosporidium-positive samples identified C. parvum (Subtype IIcA5G3c), C. galli, C. molnari, Cryptosporidium sp. genotype II of bats and Cryptosporidium sp. genotype VIII of birds.
conclusionsThe results obtained demonstrate the presence of protozoan parasites in the water of the study region, and the need to improve the surveillance systems for these pathogens and identify the corresponding sources of contamination.
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