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In trematodiases, shape and size of the fluke eggs shed with faeces are crucial diagnostic features because of their typically reduced intraspecific variability. In fascioliasis, the usual diagnosis during the biliary stage of infection is based on the classification of eggs found in stools, duodenal contents or bile. The aim of the present study is to validate the identification of Fasciola species based on the shape and size of eggs shed by humans, characterizing their morphometric traits using a computer image analysis system (CIAS). The influence of both the geographical location and of the host (human and livestock) has been analysed. Coprological studies were carried out in fascioliasis human endemic areas, where only F. hepatica is present (the northern Bolivian Altiplano and the Cajamarca valley in Peru), and where F. hepatica and F. gigantica coexist (the Kutaisi region of Georgia, the Nile Delta in Egypt, and the Quy Nhon province in Vietnam). Classically, it is considered that at the abopercular end of the shell of Fasciola eggs there is often a roughened or irregular area. Nevertheless, results show that the frequency of the presence of this feature in F. hepatica is population-dependent, and therefore is not a pathognomonic criterion in diagnosis. The study reveals that eggs shed by humans show morphological traits different from eggs shed by animals. In humans, F. hepatica eggs are bigger and F. gigantica eggs are smaller than reported to date from livestock, and their measurements overlap when compared. The material analysed in this study shows that the size of eggs shed by humans from Georgia and Egypt corresponds to the F. hepatica morph, while the size of eggs shed by humans from Vietnam corresponds to the F. gigantica morph. Measurements of F. hepatica and F. gigantica eggs originating from humans and animals from sympatric areas overlap, and, therefore, they do not allow differential diagnosis when within this overlapping range. In this sense, the new results should aid clinicians since the application of the classic egg size range in human samples may lead to erroneous conclusions. Fasciolid egg size in human stool samples ought to be corrected in books and monographs related to medical parasitology and/or tropical medicine as well as in guides for clinicians and parasitic disease diagnosis analysts.
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http://dx.doi.org/10.1016/j.actatropica.2009.04.005 | DOI Listing |
Wei Sheng Yan Jiu
November 2024
Shenzhen Baoan Center for Chronic Disease Control, Shenzhen 518100, China.
Objective: To estimate the prevalence of anxiety and examine the association between the dietary diversity and anxiety among older Chinese adults.
Methods: The data from the 2018 Chinese Longitudinal Healthy Longevity Survey(CLHLS) was used, a nationwide survey with 10 555 adults aged ≥65 years in 23 provinces of China. Dietary diversity score(DDS) was constructed based on 11 items of a food frequency questionnaire.
Wei Sheng Yan Jiu
November 2024
NHC Key Laboratory of Public Nutrition and Health, National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China.
Objective: To describe the food intake among adult residents in 10 provinces(autonomous regions) of China.
Methods: Data was collected from the financial project China Development and Nutrition Health Impact Cohort Survey in 2022-2023. The method of three consecutive 24-h dietary recalls and weighing were used to collect foods and condiments intake data.
Nat Commun
December 2024
Department of Meiosis, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany.
Aneuploidy in eggs is a leading cause of miscarriages or viable developmental syndromes. Aneuploidy rates differ between individual chromosomes. For instance, chromosome 21 frequently missegregates, resulting in Down Syndrome.
View Article and Find Full Text PDFInfect Dis (Lond)
December 2024
Department of Biology, The Parasitology, Geoinformatics, Environment and Health Science research group, Faculty of Science, Udon Thani Rajabhat University, Udon Thani, Thailand.
Background: Environmental contamination with eggs significantly impacts on opisthorchiasis transmission and disease control. This study assessed egg contamination in underwater sediments from canals and aimed to reduce transmission in egg-positive and downstream communities by controlling human opisthorchiasis in endemic area of Northeast Thailand.
Methods: Sediment samples from 14 sites in UdonThani municipality were determined for eggs.
Curr Protoc
December 2024
Department of Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas.
These protocols describe a detailed method to determine the DNA damage and F-actin and microtubule defects of metaphase II oocytes caused by hexavalent chromium, Cr(VI), an endocrine disrupting chemical (EDC). The protocol provides systematic steps to determine protein expression encoded by pluripotency proteins such as Oct4, Nanog, and Cdx2 during early embryonic development. Occupational or environmental exposure to EDCs has significantly increased infertility in both men and women.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!