To understand the distribution of Giardia cysts in drinking water supplies in Seoul, Korea, we collected water samples quarterly at 6 intakes in the Han River, its largest stream and 6 conventional water treatment plants (WTPs) serving drinking water, from 2000 to 2009. Giardia cysts in each of 10 L water were confirmed in 35.0% of intake water samples and the arithmetic mean was 1.65 cysts/10 L (range 0-35 cysts/10 L). The lowest cyst density was observed at Paldang and Kangbuk intakes, and the pollution level was higher at 4 intakes downstream. It seemed that these 4 intakes were under influence of Wangsuk stream at the end of which cysts were found in all samples with the mean of 140 cysts/10 L. The annual mean number of cysts was 0.21-4.21 cysts/10 L, and the cyst level at the second half of the 10 years was about 1/5 of that at first half on average. The cysts were more frequently found in winter, and their mean density was 3.74 cysts/10 L in winter and 0.80-1.08 cysts/10 L in other seasons. All finished water samples collected at 6 WTPs were negative for Giardia in each of 100 L sample for 10 years and cyst removal by physical process was average 2.9-log. It was concluded that conventional water treatment at 6 WTPs of Seoul appears to remove the cysts effectively under the present level of their source water. Domestic wastewater from the urban region could be an important source of Giardia pollution in the river.
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http://dx.doi.org/10.3347/kjp.2011.49.1.9 | DOI Listing |
Cureus
December 2024
Pediatric Service, Child and Youth Department, Hospital Professor Doutor Fernando Fonseca, Lisbon, PRT.
Background and objective Intestinal parasitic infections are a major public health concern, especially in low-income regions with poor sanitation. Our hospital caters to a large migrant population, but data on these infections in Portugal is limited. This study aimed to assess the prevalence and characteristics of intestinal parasitic infections in pediatric patients from epidemiological, clinical, and microbiological perspectives.
View Article and Find Full Text PDFInt J Vet Sci Med
January 2025
Galicia (Grupo INVESAGA). Departamento de Patología Animal. Facultad de Veterinaria, Universidade de Santiago de Compostela, Lugo, Spain, Investigación en Sanidad Animal.
Although , and some species are frequently involved in neonatal calf diarrhoea (NCD), detailed studies on their interactions are scarce. Therefore, a cross-sectional study including faecal samples from 404 diarrhoeic calves aged 0-30 days was performed. oocysts and cysts were detected by immunofluorescence antibody test and positive samples were molecularly characterized.
View Article and Find Full Text PDFBMC Vet Res
January 2025
Laboratório de Epidemiologia Veterinária, Departamento de Veterinária Preventiva, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brasil.
Background: The proximity between people and their domestic animals with wild animal populations can result in the spread of diseases with a significant impact on public health. Infection by parasites in wildlife is considered an important bioindicator of the current state of ecosystems, and studying the epidemiology of these infections is essential for a better understanding of natural foci. However, research on parasites in southern Brazil, especially in Rio Grande do Sul (RS), is considered incipient.
View Article and Find Full Text PDFArch Razi Inst
June 2024
Department of Medical Laboratory Sciences, College of Health Sciences, University of Duhok, Iraq.
Arch Razi Inst
June 2024
Department of Biomedical Sciences, College of Medicine, University of Zakho, Kurdistan Region, Iraq.
Intestinal protozoan parasitic infections are considered one of the most frequent types of infection caused by these parasites and remain a major health problem for communities. This study aims to detect the frequency of intestinal protozoan infections infection among Zakho general population from October 2018 to June 2022. This cross-sectional study was performed on 2,118 patients referring to private medical diagnostic laboratories in Zakho, Kurdistan Region, Iraq.
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