Acta Parasitologica最新文献

{"title":"Unveiling the Diversity and Zoonotic Potential of Plasmodium inui: a Comprehensive Review of Insights from Indonesia and Southeast Asia","authors":"Risqa Novita,&nbsp;Agik Suprayogi,&nbsp;Andria Agusta,&nbsp;Arifin Budiman Nugraha,&nbsp;Huda Shalahudin Darusman","doi":"10.1007/s11686-025-00995-3","DOIUrl":"10.1007/s11686-025-00995-3","url":null,"abstract":"<div><h3>Purpose</h3><p><i>Plasmodium inui</i> is a type of malaria that is endemic in simian populations in Southeast Asia, primarily infecting nonhuman primates, one of which is <i>Macaca fascicularis</i>, or the long-tailed macaque. <i>Plasmodium inui</i>, a malaria parasite endemic to simian populations in Southeast Asia, predominantly targets non-human primates. The escalating rates of deforestation and urban expansion, which facilitate increased interactions between humans and primates, have intensified concerns regarding its zoonotic potential. Despite receiving comparatively less scholarly attention than <i>P. knowlesi</i>, <i>P. inui</i> is distinguished by its substantial strain diversity and capacity to infect various macaque species. This review investigates the potential for crossspecies transmission of <i>P. inui</i> to humans, concentrating on the regions of Indonesia and Southeast Asia.</p><h3>Methods</h3><p>We evaluate the ecological and epidemiological determinants influencing the distribution and transmission dynamics of <i>P. inui</i> among macaques while also considering the implications for human infection based on a literature review obtained from PubMed, Google Scholar, and Scopus.</p><h3>Results</h3><p>Although no documented human cases have emerged in Indonesia, cases in humans have only been detected in Malaysia and Thailand, the review underscores the zoonotic risk associated with <i>P. inui</i>, drawing comparisons to other simian malaria species that have successfully infiltrated human populations. The lack of systematic surveillance and detailed molecular investigations concerning <i>P. inui</i> in these regions accentuates the imperative for further scholarly inquiry.</p><h3>Conclusion</h3><p>This review emphasizes the need for ongoing monitoring and research to enhance the understanding of zoonotic threats associated with <i>P. inui</i>, and informs future public health initiatives in Southeast Asia through a comprehensive evaluation of the genetic diversity of the parasite and its potential implications for public health.</p></div>","PeriodicalId":6932,"journal":{"name":"Acta Parasitologica","volume":"70 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143373301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of the Methods Fixation and Staining of Infected Macrophages with Recovery of Promastigotes in Culture to Evaluate Phagocytosis and Amastigote Proliferation of Leishmania sp. in vitro","authors":"Santiago Aguiar Espellet Soares,&nbsp;André Murilo de Souza Marques,&nbsp;José Rodrigues do Carmo-Neto,&nbsp;Clayson Moura Gomes,&nbsp;Grazzielle Guimarães de Matos,&nbsp;Milton Adriano Pelli de Oliveira","doi":"10.1007/s11686-025-00990-8","DOIUrl":"10.1007/s11686-025-00990-8","url":null,"abstract":"<div><h3>Purpose</h3><p>Infection of macrophages is a mandatory step for <i>Lesihmania</i> to promote mammalian infection and the evaluation of parasites proliferating inside macrophages reveals important information about parasites virulence and leishmanicidal drugs. Here we compare macrophage phagocytosis ability and amastigote proliferation of <i>L. major</i> or <i>L. braziliensis</i> by two different methods: fixation and staining of infected macrophages or recovery of promastigotes in culture.</p><h3>Methods</h3><p>Promastigote parasites were used to infect thioglycolate-elicited BALB/c mice peritoneal macrophages. Phagocytosis was evaluated at 3 h after infection and amastigote proliferation was evaluated directly or indirectly at 3, 6, and 9 days after infection.</p><h3>Results</h3><p>Phagocytosis of <i>L. major</i> and <i>L. braziliensis</i> by murine macrophages was respectively 54.38 ± 10.41% and 62.54 ± 19.01%, according to the fixation and staining method. The infection index (product of the percentage of infected cells X the number of parasites per cell) obtained by fixation and staining method showed proliferation of <i>L. major</i> inside macrophage from 108.42 ± 25.57 (3 h) to 510.09 ± 99.13 (9 days) and decrease of the number of <i>L. braziliensis</i> from 223.01 ± 58.46 (3 h) to 101.37 ± 20.06 (9 days). The parasites recovered/ mL in culture increased for <i>L. major</i> infected macrophage from 2,38 × 10⁶ ± 2,31 × 10⁶ (3 h) to 16,8 × 10⁶ ± 8,3 × 10⁶ (9 days) and decreased from 8.43 × 10⁶ ± 6.8 × 10⁶ (3 h) to 0.19 × 10⁶ ± 0.21 × 10⁶ (9 days) for <i>L. braziliensis</i> infected macrophage. The fixation and staining method allowed to observe that both parasite species proliferated inside of some macrophages, while other macrophages maintain the parasite number unaltered or even kill the parasite.</p><h3>Conclusion</h3><p>Both methods showed that <i>L. major</i> proliferates in vitro inside of murine macrophages while <i>L. braziliensis</i> are mostly eliminated by these cells. Only fixation and staining allowed to identify <i>L. braziliensis</i> susceptible macrophages in vitro.</p></div>","PeriodicalId":6932,"journal":{"name":"Acta Parasitologica","volume":"70 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Intestinal Parasitic Infection on Nutritional Status on Under-five Children Patients Visiting Assela Referral Hospital, East Arsi Zone, Oromia Region, Ethiopia","authors":"Tilahun Endale,&nbsp;Melese Birmeka,&nbsp;Damtew Bekele","doi":"10.1007/s11686-025-00997-1","DOIUrl":"10.1007/s11686-025-00997-1","url":null,"abstract":"<div><h3>Background</h3><p>Intestinal parasitic infections (IPIs) and undernutrition in under-five children are a major public health concern in low and middle-income countries, contributing to childhood morbidity and disability.</p><h3>Aim</h3><p>This study aimed to investigate the effect of intestinal parasites on the anthropometric status of outpatients in under five children.</p><h3>Methods</h3><p>An institutional-based cross-sectional study was conducted at Assela referral hospital, Ethiopia from February 15 to March 30, 2024. Stool samples were collected from 227 children and examined using direct wet mount and formal ether concentration techniques. An Adjusted Odds Ratio analysis was done to test the association between intestinal parasitic infection and nutritional status (stunting, wasting and underweight).</p><h3>Results</h3><p>The prevalence of stunting, underweight, and wasting was 38(16.7%), 64(28.2%), and 59(26%), respectively. The total prevalence of parasitosis was 44(19.4%) of children infected with at least one type of intestinal parasite. The most common intestinal parasitic infections detected in the study were <i>E. histolytica</i> (8.4%), <i>E. vermicularis</i> (4.4%), and <i>Giardia lamblia</i> (3.5%). Residence (rural)(AOR = 2.46,CI 1.31–3.45,<i>P</i> = 0.02) fingernail cleanliness (not clean and also unclimbed AOR = 1.1,CI 1.1–2.3; <i>P</i> = 0.01 and climbed but not clean AOR = 1.22 CI 1.1–3.3;<i>P</i> = 0.01), parental education (unable to read and write AOR = 6.3 CI 1.3–19.1 <i>P</i> = 0.01 and Only able to read and write AOR = 2.91 CI 1.23–7.13;<i>P</i> = 0.02), deworming (lack of IPI treatment AOR = 3.1 CI 1.26–8.56 <i>P</i> = 0.01), water source (unprotected spring AOR = 1.21 CI 1.01–2.1 and unprotected river or stream AOR = 1.22 CI 1.04–4.3 <i>P</i> = 0.01) were more likely to be infected in intestinal parasites than the respective category. Undernutrition (stunting AOR = 4.1 CI 1.92–8.7; <i>P</i> = 0.02; underweight AOR = 8.5, CI 1.69–4.49; <i>P</i> = 0.01 and wasting AOR = 7.64, CI 4.1-16.64; <i>P</i> = 0.02) were significantly associated with intestinal parasitic infections at 5% significant level.</p><h3>Conclusion</h3><p>This study indicated that intestinal parasitic infections had significant effect on nutritional status of under five children in study area. To address the problem public health interventions activities were needed like deworming programs, health education, sanitation and nutritional improvement.</p></div>","PeriodicalId":6932,"journal":{"name":"Acta Parasitologica","volume":"70 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11686-025-00997-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In Vitro and in Vivo Antiparasitic Efficacy of Aqueous Mahua Oil Cake Extract Against Argulus foliaceus Infestation in Cyprinus carpio (Linneaus, 1758)","authors":"Arpit Acharya,&nbsp;Himadri Saha,&nbsp;Prasenjit Pal","doi":"10.1007/s11686-024-00937-5","DOIUrl":"10.1007/s11686-024-00937-5","url":null,"abstract":"","PeriodicalId":6932,"journal":{"name":"Acta Parasitologica","volume":"70 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Larvicidal Efficacies of Nanoliposomes Containing Alpha-pinene, Citral, Camphor, and Thymol Against Aedes aegypti and Anopheles stephensi Mosquito Vectors","authors":"Alireza Sanei-Dehkordi,&nbsp;Narges Fereydouni,&nbsp;Mahmoud Agholi,&nbsp;Seyed AhmadReza Ziaei,&nbsp;Zahra Azadpour,&nbsp;Elham Zarenezhad,&nbsp;Mahmoud Osanloo","doi":"10.1007/s11686-025-00993-5","DOIUrl":"10.1007/s11686-025-00993-5","url":null,"abstract":"<div><h3>Background</h3><p>Diseases transmitted by <i>Aedes aegypti</i> or <i>Anopheles stephensi</i>, such as Zika virus, dengue fever, and malaria, pose substantial risks to public health, particularly in tropical areas. Plant-derived compounds have emerged as promising alternatives due to their inherent safety and potential efficiency against mosquitoes. This study aimed to improve the efficacy of certain natural compounds, including α-pinene, citral, camphor, and thymol, by developing nanoliposomal formulations.</p><h3>Methods</h3><p>The ‎nanoliposomes containing α-pinene, citral, camphor, and thymol were prepared using the ethanol injection method and then characterized. Using WHO-recommended guidelines, their larvicidal efficacy was investigated against <i>Aedes aegypti</i> and <i>Anopheles stephensi</i>.</p><h3>Results</h3><p>The ‎nanoliposomes particle sizes were 105 ± 7, 86 ± 5, 149 ± 5, and 135 ± 8 nm, and zeta potentials ‎were − 25.1 ± 0.5, -17.2 ± 1.2, -16.4 ± 1.6, and − 21.3 ± 1.7 mV, respectively. In addition, the ATR-FTIR (Attenuated Total Reflectance-Fourier Transform InfraRed) analysis verified the successful loading of the compound. Nanoliposomal compounds exhibited superior performance compared to their non-formulated counterparts in larvicidal bioassays. The nanoliposomes containing thymol showed the highest efficacy, with a Lethal Concentration 50 (LC₅₀) of 20 µg/mL against <i>Ae. aegypti</i>. Nanoliposomes containing citral exhibited an LC₅₀ of 20 µg/mL against <i>An. stephensi</i>.</p><h3>Conclusions</h3><p>The results suggest that nanoliposomes have the potential to serve as an effective vehicle to improve the efficiency of plant-based larvicides. This could play a significant role in developing sustainable mosquito control strategies.</p></div>","PeriodicalId":6932,"journal":{"name":"Acta Parasitologica","volume":"70 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In Silico Discovery of Antigenic-Secreted Proteins to Diagnostic Human Toxocariasis","authors":"María A. Henao,&nbsp;Isabella Cortes,&nbsp;Juan P. Isaza","doi":"10.1007/s11686-024-00966-0","DOIUrl":"10.1007/s11686-024-00966-0","url":null,"abstract":"<div><h3>Background</h3><p>Human toxocariasis is a helminthic zoonosis caused by infection of <i>Toxocara canis</i> or <i>T. cati.</i> Humans can be infected by through ingestion of embryonated eggs from contaminated water, food or soil. Diagnosis is challenging, immunodiagnosis tests are commonly implemented with major pitfalls in the cross-reactivity with other pathogens, particularly in endemic areas.</p><h3>Methods</h3><p>With the aim of identify species-specific genes encoding for highly expressed antigenic proteins, a list of parasites that may infect humans and that might present similar clinical symptoms to <i>T. canis</i> infections was built. Only organisms whose genomes were completely sequenced and the proteome predicted were included. First, orthologous proteins were detected and the subcellular localization of <i>T. canis</i> proteins was predicted. In order to identify differentially expressed genes encoding proteins in larvae L3, pair-wise comparisons among transcriptomes from body parts and genders were performed. Finally, all secreted proteins classified as species-specific of <i>T. canis</i>, whose genes were upregulated in larvae L3 were included in an antigenic prediction.</p><h3>Results</h3><p>Twenty-eight parasites were included in the analyses, proteins of <i>T. canis</i> were clustered in 11,399 groups, however, 279 were species-specific groups which represent 816 proteins. Three hundred and twenty-two proteins were predicted to be secreted and upregulated in larvae L3, however, after filtering these proteins by their orthology inference, only three proteins met all the features included in this study (species-specific, upregulated, secreted, and antigenic potential). To conclude, our strategy in the study is a rational approach for discovering antigenic proteins to be used in diagnosis.</p></div>","PeriodicalId":6932,"journal":{"name":"Acta Parasitologica","volume":"70 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11686-024-00966-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the Anti-Leishmanial Activity of the Hydroalcoholic Extract of Green Algae (Spirogyra): Investigation of Weight Indicators (Lesion Size and Organ Weights) in BALB/c Mice","authors":"Rahmatollah Zarezadeh Mehrizi,&nbsp;Ali Fattahi Bafghi,&nbsp;Vahid Nasiri,&nbsp;Mohammad Reza Sarafraz Ardakani,&nbsp;Mohsen Nabi Meybodi,&nbsp;Hadi Zare-Zardini","doi":"10.1007/s11686-025-00994-4","DOIUrl":"10.1007/s11686-025-00994-4","url":null,"abstract":"<div><h3>Background</h3><p>Leishmaniasis remains a significant global health concern, ranking among the top ten infectious diseases and causing substantial mortality and socioeconomic burden. Effective and accessible treatments are needed. This study investigated the potential of a hydroalcoholic extract from readily available urban green algae as an anti-leishmanial agent, focusing on its impact on key weight-related indicators of Leishmania major infection in BALB/c mice. To evaluate the in vivo anti-leishmanial activity of the hydroalcoholic extract from the common green algae genus Spirogyra against Leishmania major in BALB/c mice, specifically by assessing its effects on weight loss, lesion size, liver weight, and spleen weight—key indicators of disease progression.</p><h3>Methods</h3><p>Spirogyra algae were collected and identified in Yazd Province, Iran. A hydroalcoholic extract was prepared and administered via intraperitoneal injection into Leishmania major-infected BALB/c mice at doses of 3, 6, and 12 mg/kg/day, starting after lesion development. The control groups included untreated infected mice (negative control), healthy uninfected mice (control), and infected mice treated with Glucantime (positive control). We assessed treatment efficacy by monitoring weight loss, lesion diameter, liver weight, and spleen weight.</p><h3>Results</h3><p>Treatment with the highest concentration of Spirogyra extract (12 mg/kg/day) significantly mitigated weight loss in infected mice, demonstrating comparable efficacy to Glucantime. Both the 12 mg/kg/day algae extract and Glucantime significantly controlled lesion growth. Importantly, both treatments significantly reduced liver and spleen weight compared with the negative control group, indicating a reduction in organomegaly. Specifically, the negative control and 3 mg/kg extract groups exhibited the highest liver weights, whereas the negative control group showed significantly higher spleen weights than the other groups. The 12 mg/kg extract and Glucantime groups showed liver and spleen sizes comparable to the healthy control group, demonstrating effective control of organ size changes associated with leishmaniasis.</p><h3>Conclusion</h3><p>The hydroalcoholic extract of urban Spirogyra green algae, particularly at a dose of 12 mg/kg/day, exhibited significant in vivo anti-leishmanial activity in BALB/c mice. Evaluated through weight indicators such as reduced weight loss, controlled lesion growth, and normalized liver and spleen weights, the extract showed promise in mitigating the detrimental effects of Leishmania major infection and warrants further investigation as a potential source for novel anti-leishmanial therapeutics.</p></div>","PeriodicalId":6932,"journal":{"name":"Acta Parasitologica","volume":"70 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Systematic Review and Meta-analysis on the Prevalence of Bovine Fascioliasis in Nigeria","authors":"Victor Ibukun Agbajelola,&nbsp;Blessing Seun Agbajelola","doi":"10.1007/s11686-025-00991-7","DOIUrl":"10.1007/s11686-025-00991-7","url":null,"abstract":"<div><h3>Objective</h3><p>Bovine fascioliasis, a parasitic disease caused by <i>Fasciola</i> species, severely affects cattle health and agricultural productivity in tropical regions like Nigeria. It leads to economic losses through liver condemnations, decreased meat and milk production, and increased veterinary expenses. Despite its public health and economic significance, existing data on its prevalence and epidemiological patterns in Nigeria is limited.</p><h3>Methods</h3><p>This systematic review and meta-analysis compiled findings from 40 studies conducted between 1980 and 2024 to evaluate the prevalence and distribution of bovine fascioliasis in Nigeria.</p><h3>Results</h3><p>The analysis included 5,174,019 cattle and identified 120,678 infections, with a pooled prevalence of 29% (95% CI: 0.21, 0.38) using a random-effects model. A high level of heterogeneity was noted (<i>I</i>² = 100%, tau² = 0.0893). Subgroup analyses showed a higher prevalence in cross-sectional studies (33%, 95% CI: 0.25–0.42) compared to retrospective studies (18%, 95% CI: 0.04, 0.40). Diagnostic methods notably impacted prevalence estimates, with serological tests reporting 72%, versus 33% for microscopy and 22% for post-mortem examinations. Regional disparities were also evident, with the South-South zone exhibiting the highest prevalence in the country, underscoring the influence of environmental factors.</p><h3>Conclusion</h3><p>This study reveals the significant burden of bovine fascioliasis in Nigeria and highlights the need for region-specific, evidence-based control strategies. The findings also point to critical gaps in diagnostic standardization and surveillance, underscoring the necessity for improved diagnostic tools and integrated management practices to alleviate the effects of this parasitic disease.</p></div>","PeriodicalId":6932,"journal":{"name":"Acta Parasitologica","volume":"70 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Neospora caninum Inhibits Lewis Cancer and B16f10 Melanoma Lung Metastasis Development by Activating the Immune Response in Murine Models","authors":"Weifeng Qian,&nbsp;Yaqi Chen,&nbsp;Chen Li,&nbsp;Xiaojin Li,&nbsp;Chaochao Lv,&nbsp;Yanyan Jia,&nbsp;Suhui Hu,&nbsp;Min Zhang,&nbsp;Tianqi Wang,&nbsp;Wenchao Yan,&nbsp;Meng Qi","doi":"10.1007/s11686-025-00996-2","DOIUrl":"10.1007/s11686-025-00996-2","url":null,"abstract":"<div><p>Malignant tumors are prevalent with high mortality rates in humans, dogs, and cats. Some microorganisms have been shown to inhibit cancer progression. The objective of this study is to evaluate the inhibitory effects of <i>Neospora caninum</i>, a livestock parasite, on three different tumor models in C57BL/6 mice, including Lewis subcutaneous tumors, Lewis and B16F10 melanoma lung metastasis. The results showed that a sufficient amount of <i>N. caninum</i> tachyzoites can significantly inhibit the development of subcutaneous tumors and lung metastasis (<i>P &lt;</i> 0.001), and induce more than 50% tumor cell death in Lewis subcutaneous tumors. <i>N. caninum</i> treatment can significantly increases the infiltration of macrophages, NK cells, and CD8⁺ T cells (<i>P &lt;</i> 0.0001) in Lewis subcutaneous tumors detected by immunohistochemistry, and the percentage of these immunocytes in the spleen (<i>P &lt;</i> 0.05) of mice bearing B16F10 melanoma metastasis detected by flow cytometry. And with these changes, the mRNA expression levels of IL-12, IFN-γ, IL-2, IL-10, TNF-α and PD-L1 in tumor microenvironment and IL-12, IFN-γ, IL-2 in spleen were also significantly increased (<i>P &lt;</i> 0.05). Altogether, our results indicate that a sufficient amount <i>N. caninum</i> tachyzoites not only inhibits the growth of Lewis subcutaneous tumors, but inhibits the development of Lewis and B16F10 melanomas lung metastatic in mice by activating potent immune responses. <i>N. caninum</i> and its anti-tumor properties may be an effective anti-tumor tool.</p></div>","PeriodicalId":6932,"journal":{"name":"Acta Parasitologica","volume":"70 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Acanthamoeba spp. in Dialysis Water: Assessing the Potential Risk of Transmission to Hemodialysis Patients","authors":"Mona Mohamed Tolba,&nbsp;Heba Elhadad,&nbsp;Shaban Hassan Abu Kabsha,&nbsp;Nesma Seyam El-Kady,&nbsp;Safia Saleh Khalil,&nbsp;Amira Hussein Mohamed,&nbsp;Hend Aly El-Taweel","doi":"10.1007/s11686-025-00992-6","DOIUrl":"10.1007/s11686-025-00992-6","url":null,"abstract":"<div><h3>Purpose</h3><p><i>Acanthamoeba</i> spp. can colonize various freshwater habitats. They are the causative agents of granulomatous amoebic encephalitis and can harbor many microorganisms. We studied the presence of <i>Acanthamoeba</i> spp. in the water system of a hemodialysis unit and assessed the potential for transmission to hemodialysis patients.</p><h3>Methods</h3><p>Water samples collected from pretreatment and posttreatment water of the treatment station and from input and output water of the dialysis machines were cultured on non-nutrient agar supplemented with <i>Escherichia coli</i>. Blood samples from dialysis patients in the unit and from a control group in the same hospital were tested for anti-<i>Acanthamoeba</i> IgG antibodies.</p><h3>Results</h3><p><i>Acanthamoeba</i> spp. were found in posttreatment water. They were more commonly found in the input water samples (79.2%), than in the output water samples (16.7%) (<i>p</i> = 0.001). Anti-<i>Acanthamoeba</i> IgG antibodies were present in 32.9% of patients and were absent in the control group (<i>p</i> = 0.002). The duration of hemodialysis was significantly longer in seropositive patients than in seronegative patients (<i>p</i> = 0.008).</p><h3>Conclusion</h3><p>The study highlights the presence of <i>Acanthamoeba</i> spp. in the dialysis system. The relatively high prevalence of anti-<i>Acanthamoeba</i> IgG antibodies and the link between dialysis duration and seropositivity emphasize the importance of rigorous water monitoring.</p></div>","PeriodicalId":6932,"journal":{"name":"Acta Parasitologica","volume":"70 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11686-025-00992-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}