{"title":"Larvicidal activity of methanolic and aqueous extracts of Lavandula dentata and Nerium oleander flowers against the vector of avian malaria Culiseta longiareolata.","authors":"D Dris, H Bouabida, H Seghier, S Gheraibia","doi":"10.47665/tb.41.4.004","DOIUrl":"10.47665/tb.41.4.004","url":null,"abstract":"<p><p>In light of the adverse effects of chemical insecticides on the environment and human health, as well as the development of mosquito resistance to them, this study explores the potential of methanol and aqueous flower extracts from Lavandula dentata and Nerium oleander as bioinsecticides against Culiseta longiareolata mosquitoes. Additionally, it aims to assess the impact of these extracts on enzymatic biomarkers and biochemical composition of fourth instar larvae of Culiseta longiareolata.Qualitative analysis revealed the presence of flavonoids, terpenes, gallic and catechic tannins in both plant extracts. Sterols and quinones were exclusively found in L. dentata, while saponins were identified in N. oleander. methanolic extracts demonstrated higher yields compared to aqueous extracts. The results showed significant larvicidal activity for all the tested extracts, the LC<sub>50</sub> values after 24 hours are: 463.8; 338.1; 760.9 and 99.64 ppm for the aqueous and methanolic extract of L. dentata and N. oleander respectively. This proves that the methanolic extracts of N. oleander and L. dentata have higher efficacy against C. longiareolata compared to the aqueous extracts. Enzymatic activity assays conducted on larvae treated with various extracts, particularly at LC<sub>25</sub> and LC<sub>50</sub> concentrations, indicated an induction of the detoxification system, evidenced by increased glutathione S-transferases (GSTs) and catalase activity. Morphometric analysis revealed a significant reduction in the growth of fourth-stage larvae treated with these extracts. As well as a notable decrease of a percentage ranging from 44.23 to 83.30% in protein content; a reduction between 38.15-78.57% in carbohydrates and a percentage decrease of 23.85 to 63.58% in lipids. These findings suggest that the observed effects may be attributed to the stressful conditions imposed by the treatment, necessitating additional energy supply from carbohydrate and lipid metabolism in the larvae.</p>","PeriodicalId":101343,"journal":{"name":"Tropical biomedicine","volume":"41 4","pages":"441-449"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143061895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D S Annsley, K L Chin, K K Tan, S AbuBakar, N Zainal
{"title":"Association of total and dengue-specific IgE levels in the sera with dengue virus inhibition and antibody-dependent enhancement.","authors":"D S Annsley, K L Chin, K K Tan, S AbuBakar, N Zainal","doi":"10.47665/tb.41.4.009","DOIUrl":"10.47665/tb.41.4.009","url":null,"abstract":"<p><p>Dengue, caused by the dengue virus (DENV), poses a significant global health challenge. Effective vaccines and treatments for dengue are lacking due to gaps in understanding its pathogenesis and mechanisms in severe cases. This study investigates the role of immunoglobulin E (IgE) in dengue, focusing on its potential association with virus neutralization and antibody-dependent enhancement (ADE) in DENV replication. Serum samples were obtained from dengue-positive (dengue-IgG positive), SLE (dengue-IgG negative), and control (dengue-IgG and SLE-negative) individuals. SLE sera were included as a control for their high total IgE levels. Total IgE and dengue-specific IgE levels were measured using ELISA. Neutralization assays in Vero and KU812 cells were conducted to assess virus neutralization and ADE, respectively. Dengue-positive and SLE sera showed higher total IgE levels than control sera, although there was no significance seen. Dengue-positive sera showed the presence of dengue-specific IgE, whereas SLE and control sera exhibited negligible levels. Neutralization assay in dengue-positive sera revealed no correlation between IgE levels and virus inhibition. SLE sera, however, demonstrated an inverse correlation between total IgE levels and DENV neutralization, suggesting a potential involvement of total IgE in DENV replication in the context of SLE. Seventy-eight percent of SLE sera, 65% of denguepositive and 54% of control sera exhibited enhanced virus replication in KU812 cells with serum compared to virus alone, indicating the highest occurrence of ADE in SLE, followed by dengue-positive and control sera. DENV expression in KU812 cells was notably higher in SLE sera, indicating increased ADE risk. However, no association was found between IgE levels and virus expression in KU812 cells across all groups. The inverse correlation between total IgE levels and DENV neutralization in SLE sera suggests that IgE may facilitate virus replication. Further comprehensive exploration is needed to fully understand the role of IgE in dengue pathogenesis.</p>","PeriodicalId":101343,"journal":{"name":"Tropical biomedicine","volume":"41 4","pages":"481-490"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143061911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Pathogenic viruses associated with bats of Malaysia.","authors":"C P Balinu, S Diam, T H Chua","doi":"10.47665/tb.41.3.001","DOIUrl":"https://doi.org/10.47665/tb.41.3.001","url":null,"abstract":"<p><p>Numerous human diseases, including those caused by viruses like Nipah virus and SARS-CoV, can be traced back to bats as their origin. Malaysia, notably Sabah and Sarawak in Borneo Island, is home to a rich diversity of bats that serve as hosts for various viruses. This comprehensive review represents the inaugural exploration of viruses found in Malaysian bats, as documented in scientific journals. It also encompasses documented instances of bat virus-related disease outbreaks in Malaysia up to the present day, along with an analysis of the risk factors associated with virus spillover events. Furthermore, this review offers insights into prospective research areas of significance and suggests potential mitigation strategies.</p>","PeriodicalId":101343,"journal":{"name":"Tropical biomedicine","volume":"41 3","pages":"230-240"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Comparative analysis of transcriptomics of Fasciola hepatica at different developmental stages.","authors":"N Li, W Tian, L Sun, H Yan, S Hasi","doi":"10.47665/tb.41.3.009","DOIUrl":"https://doi.org/10.47665/tb.41.3.009","url":null,"abstract":"<p><p>This study explored the transcriptome differences in Fasciola hepatica at different developmental stages and identified functional genes related to growth and development during juvenile stages. DNBSEQ eukaryotic strand-specific transcriptome resequencing technology was used to sequence the transcriptomes of Fasciola hepatica eggs, juveniles, and adults. Additionally, the genes that were highly expressed during the juvenile stage were validated using qRT-PCR. The Q20 values of all three phases of sequencing were above 98%, and the Q30 values were above 94%. The differentially expressed genes (DEGs) in pairwise comparisons were analyzed by GO functional classification and the KEGG pathway database. Many immune-, growth-, and development-related pathways were found, which might be related to cell proliferation, development, and host immune evasion by Fasciola hepatica. In addition, five DEGs with high expression levels during the juvenile stage were identified: Cathepsin B, Glutathione S-transferase mu, heat shock protein 67B2, Kunitz-CH, and Legumain. Validation analyses revealed that these genes play key roles in maintaining normal growth, development, and immunological processes in liver Fasciola hepatica. RNA-seq was used to analyze the biological characteristics of the DEGs at different developmental stages concerning GO functional classification and KEGG metabolic pathways. Five DEGs with high expression during the juvenile stage were identified. These genes are related to the growth, development, and immune function of Fasciola hepatica, which provides a theoretical basis for subsequent research on the proteomics of Fasciola hepatica and the screening of candidate genes for early diagnosis.</p>","PeriodicalId":101343,"journal":{"name":"Tropical biomedicine","volume":"41 3","pages":"290-297"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S Muhammad Hafiz, A O Attah, S Mohd Salleh, M U Rusli, M T Farah Haziqah
{"title":"Rare occurrence of Blastocystis in sea turtles and insects (cockroaches, houseflies, and crickets) from several states in Peninsular Malaysia.","authors":"S Muhammad Hafiz, A O Attah, S Mohd Salleh, M U Rusli, M T Farah Haziqah","doi":"10.47665/tb.41.3.017","DOIUrl":"https://doi.org/10.47665/tb.41.3.017","url":null,"abstract":"<p><p>Blastocystis a single-celled eukaryotic protist, is known to inhabit the intestines of various hosts, including humans, and has been implicated in a wide spectrum of symptoms, ranging from gastrointestinal issues to skin disorders, thereby establishing its status as an emerging infectious agent. In this study, the prevalence of Blastocystis infection was investigated in insects, including cockroaches, houseflies, and crickets, as well as sea turtles. Additionally, the genotypic characteristics of the isolated Blastocystis strains were examined, and the evolutionary relationships between Blastocystis species found in sea turtles, and animals/humans were determined. Microscopic techniques and molecular methods were utilized in this study. The results showed that four out of 90 insects (4.44%) and one out of 13 sea turtles (7.7%) were infected by Blastocystis. Furthermore, detailed observations revealed the presence of characteristic morphological features, such as vacuolar forms in the cockroach, cricket and sea turtle samples and binary fission from cockroach samples, indicative of Blastocystis' mode of reproduction. While the ST8 of Blastocystis in sea turtles were successfully identified, no subtyping was achieved for the infected insects. This study not only establishes the occurrence of Blastocystis infection in sea turtles but also uncovers its ability to infect insects, suggesting a potential reservoir role for these organisms. Overall, this research emphasizes the significance of comprehending the prevalence, genotypic diversity, and evolutionary relationships of Blastocystis across various hosts. Such insights are instrumental in developing effective control measures and public health interventions to mitigate the associated symptoms and prevent future outbreaks.</p>","PeriodicalId":101343,"journal":{"name":"Tropical biomedicine","volume":"41 3","pages":"363-369"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Bacillus cereus in rice: A review on food poisoning, antimicrobial resistance, and control measures.","authors":"P Y Woh, C Ng","doi":"10.47665/tb.41.3.010","DOIUrl":"https://doi.org/10.47665/tb.41.3.010","url":null,"abstract":"<p><p>Rice is often associated with Bacillus cereus (B. cereus) food poisoning. This review aims to explore the food poisoning activity, antimicrobial resistance, and control measures of B. cereus in rice from 1974 to October 2023. We searched for eligible studies from the PubMed database based on explicit criteria following the PRISMA checklist. A total of 117 articles were collected, and the final analysis included 29 studies. Quality appraisal was performed using AMSTAR 2, SANRA 2, and Critical Appraisal Tool standards. B. cereus can grow and multiply in food to cause emetic vomiting or diarrheal syndrome. The primary etiology of B. cereus contamination is improper food handling and storage temperature during the cooking, cooling, and reheating stages of rice. The alarming rise of antimicrobial resistance in B. cereus to beta-lactam antibiotics necessitates alternatives from natural antimicrobial preservatives such as carvacrol, chitosan, or trans-cinnamaldehyde to prevent microbial infestation and toxin production. Implementing food safety strategies tailored to specific food settings, such as restaurants and factorymanufactured ready-to-eat rice, is critical for preventing food contamination by B. cereus. Given the heat-resistant spores and intoxication properties of B. cereus, it is important to develop effective interventions and hygienic protocols from farm to fork.</p>","PeriodicalId":101343,"journal":{"name":"Tropical biomedicine","volume":"41 3","pages":"298-309"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A Boonsuya, P Arunsan, P Pechdee, N La, C Thanchonnang, N K Rattanapitoon, S K Rattanapitoon
{"title":"Detection of the carcinogenic liver fluke, Opisthorchis viverrini: comparison of two coprological methods versus the automatic feces analyzer.","authors":"A Boonsuya, P Arunsan, P Pechdee, N La, C Thanchonnang, N K Rattanapitoon, S K Rattanapitoon","doi":"10.47665/tb.41.3.005","DOIUrl":"https://doi.org/10.47665/tb.41.3.005","url":null,"abstract":"<p><p>Liver fluke infection, particularly Opisthorchis viverrini, poses a significant public health risk in Thailand, where it is closely associated with cholangiocarcinoma and contributes to substantial mortality in the northeastern region. Diagnosis of this condition employs various parasitological approaches. This research aims to compare the diagnostic accuracy of three parasitological techniques: the Kato Katz technique (KKT), the formalin-ethyl acetate concentration technique (FECT), and the Fully Automatic Feces Analyzer (FAFA) for O. viverrini identification. A total of 455 fecal specimens were collected from rural areas across five provinces in northeastern Thailand. The specimens were processed according to each method and examined through microscopy for KKT and FECT, and by utilizing an artificial intelligence-based machine for FAFA. Data analysis was conducted to assess parasitic infection rates and observe diagnostic accuracy. The results revealed a parasitic infection rate of 19.34%, with the majority of infections attributed to O. viverrini (18.02%), followed by Strongyloides stercoralis (0.88%). FECT exhibited the highest positive detection of O. viverrini eggs (16.48%), followed by FAFA (10.55%), and KKT (8.57%), respectively. Statistical analysis indicated sensitivity and specificity values for O. viverrini detection by KKT (100% and 89.21%), FECT (98.67% and 97.63%), and FAFA (97.92% and 91.15%). The positive predictive value, negative predictive value, and kappa were reported for FECT (89.16%, 99.73%, 0.92), FAFA (56.63%, 99.73%, 0.67), and KKT (45.78%, 100%, 0.58). Additionally, the preparation time for KKT, FECT, and FAFA was 30, 15, and 10 min, respectively. In conclusion, this study highlights FECT, KKT, and FAFA as comparably sensitive in diagnosing O. viverrini. The FAFA machine emerges as a potentially valuable tool for detecting O. viverrini and other parasitic infections, showcasing promise for clinical use. The findings provide valuable insights into the diagnostic landscape and underscore the potential of FAFA in enhancing efficiency and accuracy in parasitological assessments.</p>","PeriodicalId":101343,"journal":{"name":"Tropical biomedicine","volume":"41 3","pages":"264-270"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A O Attah, K Y Ong, A Sanggari, I L Lee, N A I I Nik Him, A H Ismail, M T Farah Haziqah
{"title":"Occurrence and ultrastructural surface of Blastocystis isolated from water sources in Kedah and Penang, Malaysia.","authors":"A O Attah, K Y Ong, A Sanggari, I L Lee, N A I I Nik Him, A H Ismail, M T Farah Haziqah","doi":"10.47665/tb.41.3.018","DOIUrl":"https://doi.org/10.47665/tb.41.3.018","url":null,"abstract":"<p><p>Blastocystis is a ubiquitous waterborne parasite that has been implicated in some disease conditions including colorectal cancer and irritable bowel syndrome, and its surface coat characteristics have been associated with its pathogenicity. Although the morphology of Blastocystis isolates from human and animal sources have been studied, there is a paucity of data on the surface ultrastructure of Blastocystis isolated from water sources. Therefore, this study aimed to determine the occurrence and the ultrastructural surface of Blastocystis isolates from several water sources in Kedah and Penang, Malaysia. A total of 12 water samples were collected, namely, Pinang River and USM Harapan Lake all in Penang, whereas Lata Bayu Waterfall in Baling and UniSHAMS Lake, Kuala Ketil in Kedah. These were examined for Blastocystis by centrifugation and in vitro cultivation. Scanning electron microscopy (SEM) and light microscopy were employed to study the morphological characteristics and the surface ultrastructure of the parasite. Polymerase chain reaction (PCR) was carried out to obtain the subtypes (ST) of the positive Blastocystis isolates. The result revealed 25.0% (3/12) contamination with Blastocystis in which ST1, ST2, and an unknown ST (with a high similarity to ST1) were detected in water samples from the upstream, downstream, and midstream, respectively of Pinang River. Our study also revealed similarities in the sizes of the isolates from different river points, which were notably more diminutive compared to the sizes of the parasites observed in existing data from human and animal isolates. The surface characteristics showed a collection of single and dividing cells with smooth, folded surfaces enclosed in a film-like layer. Additionally, there were roundish, irregularly shaped cells with rough surfaces, and a woolly appearance. This study has added to our knowledge of the surface ultrastructure of Blastocystis and its possible contribution to the pathogenicity of the parasite.</p>","PeriodicalId":101343,"journal":{"name":"Tropical biomedicine","volume":"41 3","pages":"370-376"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Vector-borne diseases in Cyprus: A detailed review of the literature.","authors":"A Seyer-Cagatan, E Ruh, A Taylan-Ozkan","doi":"10.47665/tb.41.3.014","DOIUrl":"https://doi.org/10.47665/tb.41.3.014","url":null,"abstract":"<p><p>Vector-borne diseases have been a growing health concern in recent decades due to the global warming, globalization, and increased international travel. With the typical Mediterranean climate and geographical features, Cyprus provides favorable conditions for the growth and survival of arthropod species. For the purpose of this review article, the terms \"Cyprus\", \"vectors\" and \"vectorborne diseases\" were searched in the National Library of Medicine ('PubMed') and the Google Scholar databases. Published articles in the literature have documented mosquito (including Anopheles, Aedes, Culex, and Culiseta), sandfly (Phlebotomus, Sergentomyia), flea (including Ctenocephalides, Xenopsylla, Leptopsylla), and tick (including Rhipicephalus, Ixodes, Hyalomma, Haemaphysalis) species in the island. The presence of these arthropods poses a risk to public health as they can transmit a variety of diseases to both humans and animals. Research studies in Cyprus have identified infectious agents such as West Nile virus, Leishmania spp., sandfly viruses, Rickettsia spp., Coxiella burnetii, and Bartonella spp. in the local arthropods. More importantly, West Nile virus infection and imported malaria cases (mosquitoborne diseases); leishmaniasis and sandfly fever (sandfly-borne diseases); rickettsiosis, tularemia, Q fever, anaplasmosis, tick-borne relapsing fever, and Lyme disease (tick-borne diseases); and flea-borne rickettsiosis were reported in Cyprus. Taken together with the presence of arthropod vectors, published evidence in the literature suggests that Cyprus is an important region for VBDs. In addition to its climatic and geographical conditions, international travels particularly from endemic countries pose a risk for the circulation of VBDs on the island. Therefore, vector control programs should be continuously implemented, and public awareness must be raised in the region. This review, which to the best of our knowledge is the first comprehensive report on VBDs from Cyprus, will provide insight into future islandwide studies and also will be an important contribution to the elimination of VBDs in the region.</p>","PeriodicalId":101343,"journal":{"name":"Tropical biomedicine","volume":"41 3","pages":"328-344"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Potential use of anti-thrombospondin-related apical merozoite protein (TRAMP) polyclonal antibodies in sandwich enzyme-linked immunosorbent assay (ELISA) for detection of Plasmodium knowlesi.","authors":"W S M Wan Nazri, Y L Lau, F W Cheong","doi":"10.47665/tb.41.3.016","DOIUrl":"https://doi.org/10.47665/tb.41.3.016","url":null,"abstract":"<p><p>Plasmodium knowlesi, primarily a zoonotic malaria species is the most common malaria pathogen in the Southeast Asia especially in Malaysian Borneo, Malaysia. Due to morphological resemblance of P. knowlesi to other human Plasmodium, the sensitivity for microscopic detection of P. knowlesi, which is the gold standard, is compromised. Thus, efforts have been made in finding alternatives for the disease diagnosis. This study described the potential use of anti-PkTRAMP polyclonal antibodies in sandwich ELISA for P. knowlesi detection. Anti-PkTRAMP polyclonal antibodies raised from mice and rabbit were first evaluated for their binding capability towards native proteins in P. knowlesi lysates using Western blot. These mice and rabbit polyclonal antibodies were then used in the sandwich ELISA as capture and detection antibodies, respectively. P. knowlesi A1H1 culture was utilised to determine the limit of detection (LOD) of this assay. Its clinical performance was determined by testing with archived human malaria and uninfected samples. Western blot analysis affirmed the polyclonal antibodies reactivity to P. knowlesi. The LOD obtained from three replicated assays was at 0.015% parasitaemia. The assay has 76% sensitivity and 75% specificity for P. knowlesi. Its positive and negative predictive values were 76% and 75%, respectively. No cross reactivity with P. falciparum and healthy samples was observed, except for P. vivax where 10 out of 12 samples were detected. In conclusion, anti-PkTRAMP polyclonal antibodies can be useful in detecting P. knowlesi. Regardless, the full potential of anti-PkTRAMP antibodies for diagnostic purposes need to be explored further.</p>","PeriodicalId":101343,"journal":{"name":"Tropical biomedicine","volume":"41 3","pages":"356-362"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}