Parasitology最新文献_第4页

Return to the sea: Sagaratrema n. g. for the marine Liolopidae (Digenea: Diplostomida) with two new species parasitic in snakes from Sri Lanka. 回归大海：在斯里兰卡的蛇类中发现了两种新的寄生物种，其中Sagaratrema n.g是海洋蛭形虫科（Digenea: Diplostomida）。

IF 2.4 3区医学

Parasitology Pub Date : 2026-03-04 DOI: 10.1017/S0031182026101802

Manage Lenin Indrajith De Silva, Erandi Pathirana, Jayanthe Rajapakse, Storm Martin

{"title":"Return to the sea: Sagaratrema n. g. for the marine Liolopidae (Digenea: Diplostomida) with two new species parasitic in snakes from Sri Lanka.","authors":"Manage Lenin Indrajith De Silva, Erandi Pathirana, Jayanthe Rajapakse, Storm Martin","doi":"10.1017/S0031182026101802","DOIUrl":"10.1017/S0031182026101802","url":null,"abstract":"The Liolopidae Dollfus, 1934 is a small family of digenetic trematodes with sexual adults parasitic in aquatic reptiles and amphibians. Liolopids exploiting snakes are constrained to Harmotrema Nicoll, 1914, but the genus includes species with presumably freshwater life cycles parasitic in terrestrial snakes as well as species with presumably marine life cycles parasitic in viviparous sea snakes and amphibious kraits. We hypothesize that this ecological distinction implies substantial separation in evolutionary history and propose Sagaratrema De Silva, Pathirana & Martin n. g. to accommodate the liolopids in marine snakes. Three species are delineated through an integrated approach, from novel collections of viviparous sea snakes in Sri Lanka, Sagaratrema rajapaksei De Silva, Pathirana & Martin n. sp., Sagaratrema rajakarunae De Silva, Pathirana & Martin n. sp. and Sagaratrema indicum (Chattapadhyaya, 1970) n. comb. (= H. indica) originally reported from India. Three other species known from marine snakes are transferred from Harmotrema to the new genus: S. laticaudae (Yamaguti, 1933) n. comb. (designated as the type-species), S. eugari (Tubangui & Masilungan, 1936) n. comb. and S. linguiforme (Wang, 1987) n. comb. (= H. linguiforme). The 3 species from Sri Lanka are similarly genetically distinct in sympatry as each is relative to S. laticaudae from Japan. Following these proposals, Harmotrema is revised and rendered monotypic for the type-species H. infecundum. Morphologically, Sagaratrema is distinguished from Harmotrema and other liolopid genera by the arrangement of the excretory vesicles, distribution of the vitellarium and size and shape of the body.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-17"},"PeriodicalIF":2.4,"publicationDate":"2026-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147348842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Night soil fertilizer use and parasitic infections in ancient China: a preliminary study of agricultural practices, economic factors and disease ecology in the Song dynasty. 中国古代夜间土壤肥料使用与寄生虫感染：宋代农业实践、经济因素和疾病生态学的初步研究。

IF 2.4 3区医学

Parasitology Pub Date : 2026-03-02 DOI: 10.1017/S0031182026101784

Chen Chen, Anthea Yu Xuan Lee, Edward Kien Yee Yapp, Hui-Yuan Yeh

{"title":"Night soil fertilizer use and parasitic infections in ancient China: a preliminary study of agricultural practices, economic factors and disease ecology in the Song dynasty.","authors":"Chen Chen, Anthea Yu Xuan Lee, Edward Kien Yee Yapp, Hui-Yuan Yeh","doi":"10.1017/S0031182026101784","DOIUrl":"10.1017/S0031182026101784","url":null,"abstract":"This study examines the relationship between parasitic infections and agricultural innovations in China during the Song dynasty (960-1279 CE), particularly how the widespread use of night soil (human excrement) as fertilizer affected public health. The introduction of Champa rice and the expansion of double cropping systems substantially increased agricultural productivity and supported population growth but also intensified human-environment interactions that facilitated parasite transmission. The night soil was routinely transported from urban to rural areas to improve soil fertility and crop production, but its untreated application facilitated the local and regional spread of intestinal parasites. Analysis of Song dynasty historical records, including (Peaceful Holy Benevolent Prescriptions), (Classified Herbal Medicine), (Chen Fu's Agricultural Book), reveals a well-developed body of pharmacological knowledge regarding parasitic infections, suggesting that they were a significant health concern. Together with archaeoparasitological findings, this study identifies intestinal parasites - including Ascaris lumbricoides, Trichuris trichiura, Clonorchis sinensis, Enterobius vermicularis and Taenia spp. - as likely to be prevalent during the Song dynasty. Moreover, variations in food consumption, agricultural practices and sanitation systems contributed to distinct regional patterns of parasitic infections. By integrating archaeological data with historical sources, this study demonstrates how agricultural intensification and urban development during the Song dynasty created environmental conditions conducive to pathogen survival, advancing our understanding of the health costs brought by agricultural expansion in ancient China.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-9"},"PeriodicalIF":2.4,"publicationDate":"2026-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147326642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temperature driving a mass killer: assessing the risk of trematode outbreaks for New Zealand seabirds. 温度驱动大规模杀手：评估新西兰海鸟吸虫爆发的风险。

IF 2.4 3区医学

Parasitology Pub Date : 2026-02-27 DOI: 10.1017/S0031182026101796

Jerusha Bennett, Mikey Little, Jane Kitson, Robert Lewis, Sally Carson, Jake Edwards-Ingle, Robert Poulin

{"title":"Temperature driving a mass killer: assessing the risk of trematode outbreaks for New Zealand seabirds.","authors":"Jerusha Bennett, Mikey Little, Jane Kitson, Robert Lewis, Sally Carson, Jake Edwards-Ingle, Robert Poulin","doi":"10.1017/S0031182026101796","DOIUrl":"10.1017/S0031182026101796","url":null,"abstract":"Global warming is widely recognized as a key driver of current and future changes in marine ecosystems. Parasitic trematodes are highly sensitive to temperature changes, which can lead to drastic impacts on surrounding communities. Copiatestes spp. (Family Syncoelidae) are relatively little-known trematodes with atypical life cycles that have been associated with a mass mortality event of seabirds in the Chatham Islands. As they forage at sea, seabirds get their legs tangled with the sticky, free-living infective stages of Copiatestes, which impairs their ability to take off and land. We tested the impact of seasonally fluctuating sea temperature on the dynamics of Copiatestes thyrsitae at various life stages (infecting second-intermediate host, Nyctiphanes australis euphausiid, and the third free-living infective stage in the water column) by sampling plankton biweekly for 12 months in Otago Harbour, New Zealand. We reveal that higher temperatures are significantly correlated with increases in prevalence and abundance of Copiatestes infections in euphausiids, with a rapid response observed within days to weeks following temperature increases. No correlation was observed between temperature and abundance of free-living stages. Infected euphausiids were smaller in size compared to uninfected individuals. The higher infection levels in euphausiids following warmer temperatures suggest a heightened risk of entanglement for coastal seabirds at these times. Smaller-bodied, surface-feeding seabird species that consume euphausiids are particularly at risk of entanglement. Our findings suggest that even short-term heatwaves can lead to higher risk of seabirds being entangled with Copiatestes filaments, with potentially dire ecological consequences during mass parasite releases.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-9"},"PeriodicalIF":2.4,"publicationDate":"2026-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147309041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Paleoparasitology of historical toilets and mummies in South Korea: trends and perspectives. 韩国历史厕所和木乃伊的古寄生虫学：趋势和观点。

IF 2.4 3区医学

Parasitology Pub Date : 2026-02-20 DOI: 10.1017/S0031182026101760

Jong Ha Hong, Yangsu Yi, Min Seo, Seung Hee Baek, Jinseong Han, Hisashi Fujita, Chang Seok Oh, Dong Hoon Shin

{"title":"Paleoparasitology of historical toilets and mummies in South Korea: trends and perspectives.","authors":"Jong Ha Hong, Yangsu Yi, Min Seo, Seung Hee Baek, Jinseong Han, Hisashi Fujita, Chang Seok Oh, Dong Hoon Shin","doi":"10.1017/S0031182026101760","DOIUrl":"10.1017/S0031182026101760","url":null,"abstract":"Paleoparasitology has emerged as a discipline situated at the intersection of anthropology, archaeology, public health and medical science. In South Korea, research on mummies over the past few decades has yielded critical insights into historical parasite infections. Parasitological analysis of intestinal contents from well-preserved Joseon-period mummies, largely representing individuals of the upper social classes, has enabled the direct identification of parasite taxa and estimation of infection prevalence in pre-modern Korea. Beyond mummies, parasitological examinations of toilet remains have enabled reconstructions of parasitic infection dynamics in pre-modern Korean society. No toilet structures have been identified from Neolithic sites in Korea, although coprolites recovered from shell middens provide key evidence for this period. With the rise of the Three Kingdoms, archaeological evidence indicates the construction and use of increasingly sophisticated toilet facilities, including cesspit and flush-type systems, which continued to develop in later historical periods. Toilets dating to the late Joseon Dynasty and the early 20th century frequently contain coprolite samples heavily infested with parasite eggs, and their detection has confirmed the presence of toilets at otherwise uncertain archaeological sites. Across both mummy and toilet contexts, commonly identified parasites include soil-transmitted helminths such as Ascaris lumbricoides and Trichuris trichiura, as well as food-borne trematodes, reflecting long-term interactions among sanitation practices, subsistence strategies and human health in Korea.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-13"},"PeriodicalIF":2.4,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146228106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Paleoparasitological analysis on animal-origin coprolites from the Moche archaeological site Licapa II, Chicama Valley, Peru (450-900 AD). 秘鲁Chicama Valley Moche考古遗址Licapa II（公元450 - 900年）动物源粪化石的古寄生虫学分析

IF 2.4 3区医学

Parasitology Pub Date : 2026-02-18 DOI: 10.1017/S0031182026101681

Darío Alejandro Ramirez, Carito Tavera Medina, Henry Tantaleán, Rodrigo Nores

{"title":"Paleoparasitological analysis on animal-origin coprolites from the Moche archaeological site Licapa II, Chicama Valley, Peru (450-900 AD).","authors":"Darío Alejandro Ramirez, Carito Tavera Medina, Henry Tantaleán, Rodrigo Nores","doi":"10.1017/S0031182026101681","DOIUrl":"10.1017/S0031182026101681","url":null,"abstract":"Paleoparasitological research has allowed the recovery and identification of parasite structures like helminth eggs, protozoan oocysts, arthropod remains, as well as parasite ancient DNA molecules preserved in human and animal-origin archaeological material from Peruvian contexts. However, these studies are still scarce in the region despite its potential to trace parasite infections and diseases through history, and to help understand ecological relationships in the past. Here, we examined 36 coprolites from rodents and South American camelids recovered from a test pit, through light microscopy-based paleoparasitological methods, in order to characterize the parasite diversity existing at the Licapa II Moche site. The results allowed us to identify six parasite taxa, including Eimeria macusaniensis, acantocephala, strongylids, Dioctophymatidae, possibly Paraspidodera sp. and Diphyllobotrium/Adenocephalus. One of these species, E. macusaniensis, allowed us to confirm the zooarchaeological origin of some coprolites as belonging to South American camelids. The urbanization and certain practices, such as the breeding of these animals by Andean societies, would explain the occurrence of these parasites at the site, while also prompting consideration of their potential effects on the health of camelids and rodents, in which parasite disease is today a major concern. Similarly, they suggest risks of zoonotic diseases to which the people who lived there in the past may have been exposed.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-9"},"PeriodicalIF":2.4,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146213827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prevalence of zoonotic nematode Calodium hepaticum varies with small mammal community diversity across a heterogenous landscape in Eastern Uganda. 在乌干达东部异质景观中，人畜共患线虫肝钙的流行率因小型哺乳动物群落多样性而异。

IF 2.4 3区医学

Parasitology Pub Date : 2026-02-18 DOI: 10.1017/S0031182026101723

Emilia Johnson, Diana Ajambo, Maria Capstick, Moses Arinaitwe, Olivia Ericsson, Fred Besigye, Jayna Raghwani, Tristan P W Dennis, Ronald Bogere, Andrina Nankasi, Alon Atuhaire, Candia Rowell, Annet Namukuta, Asmin Mohamed, Moses Adriko, Poppy Lamberton, Edridah Tukahebwa, Kathryn J Allan, Christina Faust

{"title":"Prevalence of zoonotic nematode Calodium hepaticum varies with small mammal community diversity across a heterogenous landscape in Eastern Uganda.","authors":"Emilia Johnson, Diana Ajambo, Maria Capstick, Moses Arinaitwe, Olivia Ericsson, Fred Besigye, Jayna Raghwani, Tristan P W Dennis, Ronald Bogere, Andrina Nankasi, Alon Atuhaire, Candia Rowell, Annet Namukuta, Asmin Mohamed, Moses Adriko, Poppy Lamberton, Edridah Tukahebwa, Kathryn J Allan, Christina Faust","doi":"10.1017/S0031182026101723","DOIUrl":"10.1017/S0031182026101723","url":null,"abstract":"Calodium hepaticum (syn. Capillaria hepatica) is a generalist nematode that infects liver parenchyma of mammals worldwide and can cause human infections. Prevalence ranges from 0% to 100% in wildlife across small geographic areas, making it an ideal parasite for understanding ecological drivers of variation given intensive land use or cover change. Here, we quantify prevalence of Calodium hepaticum and present initial surveys of synanthropic small mammals. Cross-sectional rodent trapping was conducted within and around households over 2 consecutive dry seasons in 4 villages with differing land cover. DNA was extracted from liver tissue and the 18s rRNA gene of C. hepaticum was amplified to confirm presence of C. hepaticum. Landscape structural diversity was classified by tree crown density and mean canopy height derived from 30 m LiDAR data within a 0.5 km buffer. Multivariable binomial generalized linear models were fit to C. hepaticum prevalence. Calodium hepaticum infection was common (overall 34.5%, CI 95%: 27.9-41.0) and found in rodent and shrew species inside and outside residences. We observe village-level differences in prevalence (18.2-75.0%), with higher C. hepaticum prevalence associated with lower relative proportion of native rodent species to Rattus rattus (adjusted OR = 0.55, CI 95%: 0.33-0.92). Host diversity appears to be protective against parasite prevalence. Differences in molecular and gross parasitological identification highlight challenges in diagnosis and a need for more specialized molecular tools. Further investigation is required to understand individual host and community variation in pathogen infection intensity and implications for zoonotic risk.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-13"},"PeriodicalIF":2.4,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146213753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Morphology and DNA sequences reveal a new species of Clavellotis (Copepoda: Lernaeopodidae) as a parasite of three species of sparids in the Yucatán Peninsula, Mexico. 形态学和DNA序列揭示了墨西哥Yucatán半岛三种sparids寄生的clvellotis（桡足目：Lernaeopodidae）一新种。

IF 2.4 3区医学

Parasitology Pub Date : 2026-02-18 DOI: 10.1017/S0031182026101735

Betzi F Pérez-Ortega, Juan F Espínola-Novelo, Raúl Castro-Romero, Martin Miguel Montes, Gerardo Pérez-Ponce de León

{"title":"Morphology and DNA sequences reveal a new species of Clavellotis (Copepoda: Lernaeopodidae) as a parasite of three species of sparids in the Yucatán Peninsula, Mexico.","authors":"Betzi F Pérez-Ortega, Juan F Espínola-Novelo, Raúl Castro-Romero, Martin Miguel Montes, Gerardo Pérez-Ponce de León","doi":"10.1017/S0031182026101735","DOIUrl":"10.1017/S0031182026101735","url":null,"abstract":"Species of genus Clavellotis (Castro-Romero & Baeza-Kuroki, ) are parasites of marine fishes across the world. During the course of a survey on the metazoan parasites of marine fish across the Yucatán Peninsula, Mexico, specimens of a lerneapodid copepod consistent with the concept of Clavelotis were collected from the gills of three species of sparids, and were described as a new species using morphological and molecular characters. Clavellotis mayae n. sp. represents the second species of the genus reported in Mexican coastal waters. The new species morphologically resembles C. dubius and C. sebastidis in the trunk shape but can be readily distinguished by having a short maxilla which is separated to its distal end, a sub-oval and conspicuously larger aliform process, and a distal margin of the trunk bearing pronounced subcircular flaps covering the attachment sites of the egg sacs. The new species further differs from all other known congeners by having a short genital process and mandibles without secondary dentition. Molecular analyses through 28S rDNA and cox1 sequences further corroborate all these morphological distinctions and support the taxonomic placement of the new species within Clavellotis. The relationships of this species with other congeners are discussed in light of molecular evidence.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-14"},"PeriodicalIF":2.4,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146213816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mapping medieval malaria in the Netherlands: A bioarchaeological approach using cribra orbitalia as a proxy. 绘制荷兰中世纪疟疾分布图。以眶嵴为代用物的生物考古方法。

IF 2.4 3区医学

Parasitology Pub Date : 2026-02-18 DOI: 10.1017/S0031182026101747

Rachel Schats

{"title":"Mapping medieval malaria in the Netherlands: A bioarchaeological approach using cribra orbitalia as a proxy.","authors":"Rachel Schats","doi":"10.1017/S0031182026101747","DOIUrl":"10.1017/S0031182026101747","url":null,"abstract":"Malaria, historically a significant health burden in temperate Europe, particularly in the low-lying marshy areas, is often poorly represented in discussions of health in the pre-modern Netherlands. Although malaria does not produce pathognomonic skeletal lesions, the haemolytic anaemia associated with repeated infection is thought to contribute to the development of cribra orbitalia, making population-level patterns in this non-specific skeletal marker informative for exploring past malaria burden. This study applied a spatial epidemiological approach, which investigated (1) the spatial distribution of cribra orbitalia prevalence across 28 archaeological medieval sites in the Netherlands, and (2) whether this distribution can be explained by underlying environmental features consistent with malaria transmission and historical mosquito density. Global Moran's I revealed a significant positive spatial autocorrelation in prevalence. Local Indicator of Spatial Association (LISA) analysis confirmed this, identifying distinct High-High clusters in the Southwest and Low-Low clusters in the East of the Netherlands. However, linear regression models using broad-scale environmental variables failed to explain these spatial patterns. This likely reflects their inability to capture the specific ecology of the local malaria mosquito, Anopheles atroparvus, which preferentially breeds in brackish environments. Consistent with this interpretation, cribra orbitalia prevalence was significantly positively correlated with historical (1938) estimates of A. atroparvus density. The observed clustering and correlation with mosquito density suggest that malaria contributed to cribra orbitalia prevalence and may have been an important disease in certain regions of the medieval Netherlands; however, interpretation is constrained by small non-adult sample sizes as well as uneven preservation across the Netherlands.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-14"},"PeriodicalIF":2.4,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146213765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new species of Monoplectanum sillaginis sp. nov. (Monopisthocotyla: Diplectanidae) in sillaginid fish from Thailand: the investigations of species diversity, infective situation and morphology. 泰国新种单子叶目：双子叶科单子叶目一新种：物种多样性、侵染情况及形态调查。

IF 2.4 3区医学

Parasitology Pub Date : 2026-02-16 DOI: 10.1017/S0031182026101759

Nussaba Niyom, Pichit Wiroonpan, Watchariya Purivirojkul

{"title":"A new species of Monoplectanum sillaginis sp. nov. (Monopisthocotyla: Diplectanidae) in sillaginid fish from Thailand: the investigations of species diversity, infective situation and morphology.","authors":"Nussaba Niyom, Pichit Wiroonpan, Watchariya Purivirojkul","doi":"10.1017/S0031182026101759","DOIUrl":"10.1017/S0031182026101759","url":null,"abstract":"Monoplectanum monogeneans are gill parasites specific to fish in the family Sillaginidae. The sillaginid fish were collected from the middle and upper Gulf of Thailand and the Andaman Sea, Thailand, from May 2024 to January 2025. A total of 2096 fish belonging to 5 species- Sillago aeolus, S. asiatica S. indica, S. ingenuua and S. sihama were identified. Three species of Monoplectanum monogeneans were detected in 3 fish species, including 1 newly described species, M. sillaginis sp. nov. Monoplectanum sillaginis sp. nov. was found to infect 3 fish species, S. aeolus, S. indica and S. sihama, collected from the upper Gulf of Thailand. Monoplectanum youngi infected S. indica, representing a new host record, and S. sihama from both the middle and upper Gulf of Thailand. Monoplectanum australe was found to infect only S. aeolus, which was collected from the upper Gulf of Thailand. Overall prevalence and mean intensity of infections were 11.21% and 1.72, respectively. Regarding morphological features, no significant differences in key characters of both M. australe and M. youngi were observed when comparing the current and original descriptions. Monoplectanum sillaginis sp. nov., can be distinguished from these 2 species by the characteristics of its sclerotized male copulatory organ, particularly in the terminal part of the posterior prostatic reservoir, which is shuttle-shaped, as well as the number of rodlet rows in the squamodisc.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-11"},"PeriodicalIF":2.4,"publicationDate":"2026-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146202538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Antimalarial drug resistance in Plasmodium falciparum isolates from the Pacific Coast of Colombia. 哥伦比亚太平洋沿岸恶性疟原虫分离株的抗疟药耐药性。

IF 2.4 3区医学

Parasitology Pub Date : 2026-02-13 DOI: 10.1017/S0031182026101711

Kyle Michie, Bernice Chiu, Carla Briggs, Vladimir Corredor, Lorena Matta-Cortés, Julian C Rayner, Diego F Echeverri

{"title":"Antimalarial drug resistance in Plasmodium falciparum isolates from the Pacific Coast of Colombia.","authors":"Kyle Michie, Bernice Chiu, Carla Briggs, Vladimir Corredor, Lorena Matta-Cortés, Julian C Rayner, Diego F Echeverri","doi":"10.1017/S0031182026101711","DOIUrl":"10.1017/S0031182026101711","url":null,"abstract":"Antimalarial drug resistance has evolved repeatedly and independently in both Southeast Asia and South America, but functional studies of parasite resistance have almost all concentrated on Asian isolates. Colombia contributes nearly one-third of all Plasmodium falciparum cases in South America, primarily focused on the Pacific Coast. We assessed the presence of resistance associated genotypes and phenotypes in this region using a panel of P. falciparum isolates collected across 23 years, with a specific focus on sensitivity to historically used antimalarials chloroquine, mefloquine, pyrimethamine and sulfadoxine. The sensitivity profiles were predicted genetically using a combination of quantitative PCR assays and sequencing of known resistance-associated loci, including the artemisinin resistance-associated gene PfKelch13. The isolates were then assessed phenotypically by introduction to in vitro culture allowing both antimalarial sensitivity testing and the establishment of a biobank of Colombian isolates for further work. We established that multiple antimalarial resistance associated genotypes and phenotypes, particularly for chloroquine and mefloquine, persist across the Colombian Pacific Coast but found no evidence for the presence of artemisinin resistance-associated polymorphisms. The continued presence of resistance against historically used antimalarials argues against the use of these drugs as partner therapy for artemisinin and highlights the unique epidemiological environment of the Pacific Coast which allows for long-term maintenance of resistance.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-12"},"PeriodicalIF":2.4,"publicationDate":"2026-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146181712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0