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Zoonotic Lagochilascaris minor and nine other parasites in a cat. 一只猫体内的人畜共患小鲎虫和其他九种寄生虫。
IF 1.8 3区 医学
Parasitology Research Pub Date : 2024-11-22 DOI: 10.1007/s00436-024-08409-5
Renata Fagundes-Moreira, Claiton Ismael Schwartz, Felipe Auatt Batista de Sousa, Laura Berger, Fernanda Meneses Lopes, Vanessa R Barrs, Jairo A Mendoza-Roldan, Domenico Otranto, Saulo Petinatti Pavarini, Welden Panziera, João Fabio Soares
{"title":"Zoonotic Lagochilascaris minor and nine other parasites in a cat.","authors":"Renata Fagundes-Moreira, Claiton Ismael Schwartz, Felipe Auatt Batista de Sousa, Laura Berger, Fernanda Meneses Lopes, Vanessa R Barrs, Jairo A Mendoza-Roldan, Domenico Otranto, Saulo Petinatti Pavarini, Welden Panziera, João Fabio Soares","doi":"10.1007/s00436-024-08409-5","DOIUrl":"10.1007/s00436-024-08409-5","url":null,"abstract":"<p><p>A case of polyparasitism in an 8-year-old female cat from Southern Brazil is reported. Among the described clinical signs, both gurltiosis and lagochilascariasis are of rare occurrence, being categorized as neglected diseases. The diagnosis of feline crural parasitic paraplegia was established through clinical signs, necropsy lesion observations, and the presence of Gurltia paralysans in histological sections of the spinal cord. Lagochilascaris minor was diagnosed with an ulcerated wound in the cervical region and further confirmed by coprology. In addition, other gastrointestinal parasites (i.e., Trichuris spp., Diphyllobothriidae, Toxocara cati, Ancylostoma spp., Cystoisospora spp., and Entamoeba spp.) were diagnosed through fecal examination and Sarcocystis felis by molecular analysis of muscle cysts. Aelurostrongylus abstrusus was detected in histological sections of lung parenchyma and confirmed by molecular analyses. The multiple parasitism detected in this case represents a unique report in terms of the number of parasites in the same individual, indicating the risk represented by stray cats as spreaders of zoonotic agents.</p>","PeriodicalId":19968,"journal":{"name":"Parasitology Research","volume":"123 11","pages":"392"},"PeriodicalIF":1.8,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142688152","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
IL-33 deficiency inhibits Toxoplasma gondii infection by promoting NLRP3 inflammasome. IL-33 缺乏可通过促进 NLRP3 炎性体抑制弓形虫感染。
IF 1.8 3区 医学
Parasitology Research Pub Date : 2024-11-21 DOI: 10.1007/s00436-024-08414-8
Yizhong Chen, Xiaoli He, Yuqin Chen, Rongzhao Zhang, Tengwen Zhang, Tao Zhang, Linqing Wu
{"title":"IL-33 deficiency inhibits Toxoplasma gondii infection by promoting NLRP3 inflammasome.","authors":"Yizhong Chen, Xiaoli He, Yuqin Chen, Rongzhao Zhang, Tengwen Zhang, Tao Zhang, Linqing Wu","doi":"10.1007/s00436-024-08414-8","DOIUrl":"10.1007/s00436-024-08414-8","url":null,"abstract":"<p><p>NLRP3 inflammasome-mediated inflammatory responses play pivotal functions in innate immunity. However, its homeostatic regulation still needs to be better understood. Here we explore the effect and potential mechanism of IL-33 on NLRP3 inflammasome upon Toxoplasma gondii infection through a series of molecular biology and immunological experiments, including western blot, qRT-PCR, and ELISA. We demonstrated that T. gondii infection induces the expression of IL-33, and IL-33-deficient (IL-33<sup>-/-</sup>) mice exhibit longer survival time than wild-type (WT) mice upon T. gondii infection. IL-33 deficiency promotes the expression of NLRP3 and ASC and the secretion of IL-1β, while exogenous IL-33 inhibits NLRP3 inflammasome. Furthermore, T. gondii infection results in the M2 polarization of macrophages, exacerbated by exogenous IL-33, which also promotes the proliferation of T. gondii. These findings showed that IL-33 deficiency attenuates T. gondii infection by promoting NLRP3 inflammasome, advancing the understanding of the role of IL-33 in inflammation.</p>","PeriodicalId":19968,"journal":{"name":"Parasitology Research","volume":"123 11","pages":"391"},"PeriodicalIF":1.8,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682428","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
Identification and functional characterization of multiple haemadins and an oligomeric decorsin in the Asian land leech Haemadipsa interrupta. 亚洲陆地水蛭 Haemadipsa interrupta 中多种血凝素和一种低聚脱落素的鉴定与功能特征。
IF 1.8 3区 医学
Parasitology Research Pub Date : 2024-11-21 DOI: 10.1007/s00436-024-08404-w
Christian Müller, Dana Sponholz, Céline Tolksdorf, Bernhard H Rauch, Sebastian Kvist
{"title":"Identification and functional characterization of multiple haemadins and an oligomeric decorsin in the Asian land leech Haemadipsa interrupta.","authors":"Christian Müller, Dana Sponholz, Céline Tolksdorf, Bernhard H Rauch, Sebastian Kvist","doi":"10.1007/s00436-024-08404-w","DOIUrl":"10.1007/s00436-024-08404-w","url":null,"abstract":"<p><p>Haematophagous leeches rely on a broad variety of bioactive compounds to secure a sufficient blood meal from their vertebrate prey. Both the primary (platelet aggregation) and secondary (blood coagulation) haemostasis are the main targets of action. The platelet aggregation inhibitor decorsin was first described in the North American leech, Macrobdella decora Say, 1824, whereas the bivalent thrombin inhibitor hirudin was originally identified in the European medicinal leech, Hirudo medicinalis Linnaeus, 1758. Hirudin blocks both the catalytic site and the fibrinogen-binding site (exosite I) of thrombin. Haemadin of the Indian land leech Haemadipsa sylvestris Blanchard, 1894, is also a highly efficient bivalent thrombin inhibitor but blocks exosite II of thrombin. So far, only the archetypal form of haemadin from H. sylvestris has been purified and functionally characterized, and two putative haemadins have been identified in the salivary transcriptome of Haemadipsa interrupta Moore, 1835, a terrestrial leech inhabiting mainly the Malayan peninsula. Here, we describe the identification of ten additional putative haemadins in the transcriptomic data set of H. interrupta, first generated by another study. Furthermore, we identified a putative oligomeric decorsin, which represents the first finding of this anticoagulant in a haemadipsid leech. Both the putative decorsin and a selection of haemadins were expressed, purified, and functionally characterized. The putative haemadins displayed a broad spectrum of thrombin-inhibitory potencies, whereas the putative oligomeric decorsin was indeed a weak inhibitor of platelet aggregation.</p>","PeriodicalId":19968,"journal":{"name":"Parasitology Research","volume":"123 11","pages":"390"},"PeriodicalIF":1.8,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11582220/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Drug modifications: graphene oxide-chitosan loading enhanced anti-amoebic effects of pentamidine and doxycycline. 药物修饰:氧化石墨烯-壳聚糖负载增强了喷他脒和强力霉素的抗阿米巴效应。
IF 1.8 3区 医学
Parasitology Research Pub Date : 2024-11-20 DOI: 10.1007/s00436-024-08389-6
Tooba Jabri, Meshal Daalah, Bader S Alawfi, Jasra Gul, Usman Ahmed, Muhammad Raza Shah, Naveed Ahmed Khan, Ruqaiyyah Siddiqui, Tan Yee Ying, Yeo Jia Tong, Ayaz Anwar
{"title":"Drug modifications: graphene oxide-chitosan loading enhanced anti-amoebic effects of pentamidine and doxycycline.","authors":"Tooba Jabri, Meshal Daalah, Bader S Alawfi, Jasra Gul, Usman Ahmed, Muhammad Raza Shah, Naveed Ahmed Khan, Ruqaiyyah Siddiqui, Tan Yee Ying, Yeo Jia Tong, Ayaz Anwar","doi":"10.1007/s00436-024-08389-6","DOIUrl":"10.1007/s00436-024-08389-6","url":null,"abstract":"<p><p>Acanthamoeba castellanii is the causative pathogen of a severe eye infection, known as Acanthamoeba keratitis and a life-threatening brain infection, named granulomatous amoebic encephalitis. Current treatments are problematic and costly and exhibit limited efficacy against Acanthamoeba parasite, especially the cyst stage. In parallel to drug discovery and drug repurposing efforts, drug modification is also an important approach to tackle infections, especially against neglected parasites such as free-living amoebae: Acanthamoeba. In this study, we determined whether modifying pentamidine and doxycycline through chitosan-functionalized graphene oxide loading enhances their anti-amoebic effects. Various concentrations of doxycycline, pentamidine, graphene oxide, chitosan-functionalized graphene oxide, and chitosan-functionalized graphene oxide loaded with doxycycline and pentamidine were investigated for amoebicidal effects against pathogenic A. castellanii belonging to the T4 genotype. Lactate dehydrogenase assays were performed to determine toxic effects of these various drugs and nanoconjugates against human cells. The findings revealed that chitosan-functionalized graphene oxide loaded with doxycycline demonstrated potent amoebicidal effects. Nanomaterials significantly (p < 0.05) inhibited excystation and encystation of A. castellanii without exhibiting toxic effects against human cells in a concentration-dependent manner, as compared with other formulations. These results indicate that drug modifications coupled with nanotechnology may be a viable avenue in the rationale development of effective therapies against Acanthamoeba infections.</p>","PeriodicalId":19968,"journal":{"name":"Parasitology Research","volume":"123 11","pages":"387"},"PeriodicalIF":1.8,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142676067","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
Quantification of rearrangements and evolution of mitochondrial gene order of Acari (Chelicerata: Arachnida). 蛔虫(蛛形纲:Arachnida)线粒体基因顺序重排的量化与进化。
IF 1.8 3区 医学
Parasitology Research Pub Date : 2024-11-20 DOI: 10.1007/s00436-024-08416-6
Habeş Bilal Aydemir
{"title":"Quantification of rearrangements and evolution of mitochondrial gene order of Acari (Chelicerata: Arachnida).","authors":"Habeş Bilal Aydemir","doi":"10.1007/s00436-024-08416-6","DOIUrl":"10.1007/s00436-024-08416-6","url":null,"abstract":"<p><p>Invertebrate mitogenomes are generally fixed with formal 37 genes: 13 PCGs encoded subunits of OXPHOS, 2 ribosomal RNA (rRNA) functional in the translation of these PCGs and 22 transfer RNA (tRNA) genes. The order of these genes varies greatly among organisms and named rearrangement. Rearrangement patterns of mitochondrial genomes may shed light on mutation processes and evolutionary relationships of organisms. Mitochondrial gene organization is highly variable among Acari, so rearrangement is a very common mitogenomic pattern in this group. In this study, 258 unique Acari (Acariformes + Parasitiformes) mitogenomes were downloaded from NCBI and studied about rearrangement patterns. Sixty-seven mitotypes were determined among Acari and the most rearranged genes were trnL1 and nad2. Following that, trnI, trnS1, trnN, trnE, trnT, and trnP genes are remarkably mobile (RF > 95%). Conversely, atp6, cox3, trnG, and cytb genes also appears to be quite stable (RF < 20%). Within Acari, mean distance calculations are varied from 1.210 in atp8 to 0.155 in rrnS. Contrary to expectations, among Acari mobile tRNA genes appear to be conserved in sequences, whereas PCGs have higher distance values and seem to be mutated. Consistently, tRNA genes seem saturated, but some PCGs (atp6, cox genes, cytb, nad1, and nad6) are not saturated. These values do not correlate with each other (p > 0.005). This discrepancy may indicate that the genes were rearranged after mutation load; consistent with this, DAMBE saturation values are also not correlated with RF values. Parasitiformes mitogenomes are more mobile than Acariformes mitogenomes and may be under the effect of selective sweeping.</p>","PeriodicalId":19968,"journal":{"name":"Parasitology Research","volume":"123 11","pages":"389"},"PeriodicalIF":1.8,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142676094","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
Epidemiology and genetic diversity of Echinococcus granulosus sensu stricto in the East Tianshan Mountains, Xinjiang, China. 中国新疆东天山严格意义上的棘球蚴流行病学和遗传多样性。
IF 1.8 3区 医学
Parasitology Research Pub Date : 2024-11-20 DOI: 10.1007/s00436-024-08394-9
Wulijiang Kamali, Si-Yun Wang, Wei-Dong Luo, Shuai Liu, Li Zhao, Xing-Yu Pan, Bing-Jie Wang, Yong-Hui Mu, Tuoliehuojia Jiawuti, Kadierding Aierken, Zhuang-Zhi Zhang, Wan-Li Ban
{"title":"Epidemiology and genetic diversity of Echinococcus granulosus sensu stricto in the East Tianshan Mountains, Xinjiang, China.","authors":"Wulijiang Kamali, Si-Yun Wang, Wei-Dong Luo, Shuai Liu, Li Zhao, Xing-Yu Pan, Bing-Jie Wang, Yong-Hui Mu, Tuoliehuojia Jiawuti, Kadierding Aierken, Zhuang-Zhi Zhang, Wan-Li Ban","doi":"10.1007/s00436-024-08394-9","DOIUrl":"10.1007/s00436-024-08394-9","url":null,"abstract":"<p><p>In Xinjiang, previous reports of cystic echinococcosis (CE) in livestock have focused on West and Middle Tianshan Mountains. In contrast, there is an absence of research on CE in the East Tianshan Mountains. To determine the epidemiology and genetic diversity of Echinococcus granulosus sensu stricto (s.s.) in domestic animals in the East Tianshan Mountains, Xinjiang, China, the livers and lungs of 1773 domestic animals were examined, between January 2023 and March 2023, and 40 cysts were collected. Polymerase chain reaction was used for the molecular diagnosis of the cysts. Statistical results showed that the overall prevalence of echinococcosis in sheep was 6.92% (114/1646), which was significantly higher than that in cattle (1.57%, 2/127). A total of 40 cyst isolates were obtained, including 38 from sheep and 2 from cattle. Genomic DNA was extracted, and the mitochondrial cytochrome c oxidase subunit 1 (cox1) gene was amplified by PCR to obtain the target 850 bp fragment. The results revealed that all the isolates had the G1 genotype, with similarities ranging from 98.88-100%. Haplotype network analysis revealed 32 haplotypes of the cox1 gene, among which Hap_7 was the main haplotype. Furthermore, haplotype diversity (Hd = 0.313 ± 0.093) and nucleotide diversity (π = 0.00173 ± 0.00079) were lower in the East Tianshan Mountains than in other regions, indicating that the populations are genetically less differentiated. Tajima's D and Fu's Fs tests were negative (p ≤ 0.01), indicating an expansion of the population in the East Tianshan Mountains of Xinjiang, similar to the results previously reported for Xinjiang. The low fixation index (Fst) ranged from negative values (Gansu Province) to 0.30346 (Mongolia), indicating that the genetic differentiation between the East Tianshan Mountains and Gansu, and Tibet, Xinjiang was relatively low, with frequent gene flow. In this survey, two 'new' haplotypes were identified in the East Tianshan livestock. In addition, two different haplotypes of liver and lung infections were found in one cattle. This survey provides information on the epidemiology and genetic diversity of E. granulosus s.s. in the East Tianshan Mountains of Xinjiang, China.</p>","PeriodicalId":19968,"journal":{"name":"Parasitology Research","volume":"123 11","pages":"388"},"PeriodicalIF":1.8,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142676089","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
Dense granule protein 41 of Neospora caninum modulates tachyzoite egress by regulating microneme secretion. 犬新孢子虫的致密颗粒蛋白41通过调节微粒的分泌来调节速生虫的排出。
IF 1.8 3区 医学
Parasitology Research Pub Date : 2024-11-18 DOI: 10.1007/s00436-024-08405-9
Jing Yang, Yanqun Pei, Xianmei Wang, Zhu Ying, Zifu Zhu, Qun Liu, Jing Liu
{"title":"Dense granule protein 41 of Neospora caninum modulates tachyzoite egress by regulating microneme secretion.","authors":"Jing Yang, Yanqun Pei, Xianmei Wang, Zhu Ying, Zifu Zhu, Qun Liu, Jing Liu","doi":"10.1007/s00436-024-08405-9","DOIUrl":"10.1007/s00436-024-08405-9","url":null,"abstract":"<p><p>Egress represents a crucial process employed by Neospora caninum in the establishment of infection. Dense granule proteins (GRAs), secreted by the dense granule, play significant roles in modifying the parasitophorous vacuole, maintenance of morphology, and regulating host-cell interactions. However, their precise involvement in tachyzoite egress remains inadequately characterized. In this study, we identified a homologous gene, Ncgra41, corresponding to the dense granule protein 41 (GRA41) of Toxoplasma gondii, which is associated with egress, utilizing NCBI and ToxoDB databases. NcGRA41 is localized extracellularly within dense granules and intracellularly within parasitic vacuoles. Deletion of NcGRA41 did not affect tachyzoites invasion or proliferation but significantly reduced egress capacity and pathogenicity in mice. The phenotypic characteristics were restored in a complementary strain. Further investigation revealed that the absence of NcGRA41 reduced gliding motility and the transcription level of the subtilisin-like protein (SUB1). A microneme secretion assay demonstrated a significant decrease in NcMIC1 secretion, along with reduced expression levels of NcMIC1, NcMIC4, and NcMIC8. These findings demonstrate that NcGRA41, a novel dense granule protein in N. caninum, modulates tachyzoites egress and influences pathogenicity by regulating microneme secretion.</p>","PeriodicalId":19968,"journal":{"name":"Parasitology Research","volume":"123 11","pages":"386"},"PeriodicalIF":1.8,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142648877","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
Retraction Note to: Synthesis and characterization of silver nanoparticles using Gmelina asiatica leaf extract against filariasis, dengue, and malaria vector mosquitoes. 撤稿说明:利用西洋菜叶提取物合成银纳米粒子并确定其特性,以对抗丝虫病、登革热和疟疾病媒蚊虫。
IF 1.8 3区 医学
Parasitology Research Pub Date : 2024-11-16 DOI: 10.1007/s00436-024-08406-8
Udaiyan Muthukumaran, Marimuthu Govindarajan, Mohan Rajeswary, S L Hoti
{"title":"Retraction Note to: Synthesis and characterization of silver nanoparticles using Gmelina asiatica leaf extract against filariasis, dengue, and malaria vector mosquitoes.","authors":"Udaiyan Muthukumaran, Marimuthu Govindarajan, Mohan Rajeswary, S L Hoti","doi":"10.1007/s00436-024-08406-8","DOIUrl":"10.1007/s00436-024-08406-8","url":null,"abstract":"","PeriodicalId":19968,"journal":{"name":"Parasitology Research","volume":"123 11","pages":"385"},"PeriodicalIF":1.8,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142644375","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
Genetic diversity of Theileria spp. in deer (Artiodactyla: Cervidae) from Brazil. 巴西鹿(有兽门:鹿科)中 Theileria spp.的遗传多样性。
IF 1.8 3区 医学
Parasitology Research Pub Date : 2024-11-16 DOI: 10.1007/s00436-024-08398-5
Ana Cláudia Calchi, José Maurício Barbanti Duarte, Ana Carolina Castro-Santiago, Ricardo Bassini-Silva, Darci Moraes Barros-Battesti, Rosangela Zacarias Machado, Marcos Rogério André
{"title":"Genetic diversity of Theileria spp. in deer (Artiodactyla: Cervidae) from Brazil.","authors":"Ana Cláudia Calchi, José Maurício Barbanti Duarte, Ana Carolina Castro-Santiago, Ricardo Bassini-Silva, Darci Moraes Barros-Battesti, Rosangela Zacarias Machado, Marcos Rogério André","doi":"10.1007/s00436-024-08398-5","DOIUrl":"10.1007/s00436-024-08398-5","url":null,"abstract":"<p><p>Babesia spp. and Theileria spp. are tick-borne apicomplexan protozoa that can cause disease in animals and humans. Deer are considered reservoirs for a wide variety of Piroplasmida species, including some potentially zoonotic. This study aimed to investigate the occurrence and genetic diversity of piroplasmids in wild deer sampled in four Brazilian states (São Paulo, Mato Grosso do Sul, Paraná and Goiás). For this purpose, extracted DNA samples from 181 deer buffy coat samples (138 Blastocerus dichotomus, 26 Subulo gouazoubira, 4 Mazama jucunda, 3 Mazama rufa and 10 Ozotocerus bezoarticus) were subjected to a nested PCR (nPCR) assay based on the 18S rRNA gene in order to perform a screening for piroplasmids and characterized based on the near-complete 18S rRNA, hsp70 and cox-3 genes. As a result, 75.14% (136/181) samples were positive for piroplasmids. Of these, 108 (79.41%), 101 (74.26%) and 67 (49.26%) were positive to near complete 18S rRNA, hsp70 and cox-3 genes, respectively. Phylogenetic analyses based on three molecular markers showed similar topology to each other. All sequences obtained in the present study were positioned into the Theileria sensu stricto clade, forming a distinct clade, albeit close to T. cervi. Most sequences grouped together into a large clade divided into subclades, which were often related to deer genus/species, showing that Theileria lineages seemed to show specificity according to deer genus/species. Two 18S rRNA sequences (one obtained from S. gouazoubira and another from M. jucunda) were positioned into a different clade, apart from other sequences detected in this study, indicating that different species of Theileria occur in deer from Brazil. Two subclusters were observed in the phylogenetic analysis based on the hsp70 gene: the first containing only sequences detected in marsh deer and the second grouping sequences detected in brocket deer (Mazama spp. and S. gouazoubira). The latter was also divided into smaller clades that grouped Theileria genotypes according to deer species (M. jucunda, M. rufa and S. gouazoubira). This study provides the first molecular evidence of Theileria infection in M. jucunda, as well as co-infection by distinct Theileria (sub)species/genotypes in the same deer was evidenced. Finally, this study expanded the knowledge on the diversity of Theileria spp. infecting deer from South America.</p>","PeriodicalId":19968,"journal":{"name":"Parasitology Research","volume":"123 11","pages":"384"},"PeriodicalIF":1.8,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142644370","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 asymptomatic parasitaemia among household members of children under seasonal malaria chemoprevention coverage and comparison of the performance of standard rapid diagnostic tests versus ultrasensitive RDT for the detection of asymptomatic parasitaemia in Nanoro, Burkina Faso. 布基纳法索纳诺罗季节性疟疾化学预防覆盖范围内儿童家庭成员中无症状寄生虫血症的流行率,以及标准快速诊断检测与超灵敏快速诊断检测在检测无症状寄生虫血症方面的性能比较。
IF 1.8 3区 医学
Parasitology Research Pub Date : 2024-11-15 DOI: 10.1007/s00436-024-08380-1
Sié A Elisée Kambou, Kié Solange Millogo, Paul Sondo, Bérenger Kabore, Amélé Fifi Chantal Kouevi, Ismaila Bouda, Toussaint Rouamba, Karim Derra, Mark Christian Tahita, Hamidou Ilboudo, Eli Rouamba, Gauthier Tougri, Sabina Dahlström Otienoburu, Mehul Dhorda, Sanata Bamba, Philippe J Guerin, Halidou Tinto
{"title":"Prevalence of asymptomatic parasitaemia among household members of children under seasonal malaria chemoprevention coverage and comparison of the performance of standard rapid diagnostic tests versus ultrasensitive RDT for the detection of asymptomatic parasitaemia in Nanoro, Burkina Faso.","authors":"Sié A Elisée Kambou, Kié Solange Millogo, Paul Sondo, Bérenger Kabore, Amélé Fifi Chantal Kouevi, Ismaila Bouda, Toussaint Rouamba, Karim Derra, Mark Christian Tahita, Hamidou Ilboudo, Eli Rouamba, Gauthier Tougri, Sabina Dahlström Otienoburu, Mehul Dhorda, Sanata Bamba, Philippe J Guerin, Halidou Tinto","doi":"10.1007/s00436-024-08380-1","DOIUrl":"10.1007/s00436-024-08380-1","url":null,"abstract":"<p><p>Asymptomatic carriers of Plasmodium falciparum represent important parasite reservoirs maintaining malaria transmission in the community. This study aimed on the one hand to screen the other household members living with children under seasonal malaria chemoprevention (SMC) coverage in order to determine the level of malaria infection in this population and on the other hand to determine the appropriate type of rapid diagnostic test (RDT) for this screening to detect these asymptomatic carriers in the community. During the 2022 SMC campaign (July to October), a cross-sectional survey was carried out in 745 participants who were screened by ultrasensitive rapid diagnostic test (usRDT), standard rapid diagnostic test (rRDT) and microscopy. Out of them, 395 had microscopy results available and were included in the data analysis. The prevalence of asymptomatic carriers of asexual forms of Plasmodium falciparum was 26.58% (105/395) while sexual forms were found in 5.32% (21/395) of the study population. Children from 5 to 15 years had the highest prevalence of P. falciparum asexual forms 35.76% (59/165) compared with older participants. Malaria positivity rate for rRDT and usRDT was 29.40% (219/745) and 40.49% (305/745) respectively. The usRDT had a higher sensitivity than the rRDT (72.38% (95% CI 62.8-80.66) vs. 60.95% (95% CI 50.94-70.33)). In terms of specificity, rRDT had a higher specificity 82.41% (95% CI 77.53-86.62) versus 69.66% (95% CI 64.01-74.89) for usRDT. This study reports a high prevalence of parasite carriers in household members of children under SMC coverage in Nanoro, Burkina Faso. In conclusion, usRDT seems more appropriate for strategies based on detection and treatment of parasite carriers within the community.</p>","PeriodicalId":19968,"journal":{"name":"Parasitology Research","volume":"123 11","pages":"383"},"PeriodicalIF":1.8,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11564212/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142625828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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