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Chaúque BJM, da Silva TCB, Dos Santos DL, Benitez GB, Chaúque LGH, Benetti AD, Zanette RA, Rott MB. Global prevalence of free-living amoebae in solid matrices - A systematic review with meta-analysis. Acta Trop 2023; 247:107006. [PMID: 37633571 DOI: 10.1016/j.actatropica.2023.107006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/18/2023] [Accepted: 08/21/2023] [Indexed: 08/28/2023]
Abstract
The ubiquitous free-living amoebae (FLA) are microorganisms of significant medical, sanitary, and ecological importance. However, their characterization within solid matrices such as soil, dust, sediment, mud, sludge, and compost remain to be systematized. In this study, we conducted a systematic review with meta-analysis to explore the global distribution of FLA in solid matrices. From the analysis of 104 out of 4,414 scientific articles retrieved from different databases, it was found that the general global prevalence of FLA in solid matrices was of 55.13% (95% confidence interval (CI) 49.32-60.94). Specifically, FLA prevalence was high in soil (72.40%, 95% CI 69.08-75.73), sediment (57.91%, 95% CI 50.01-65.81), mud (52.90%, 95% CI 24.01-81.78), dust (48.60%, 95% CI 43.00-54.19), and sewage sludge (40.19%, 95% CI 30.68-49.70). In aerosols it was comparatively lower (17.21%, 95% CI 12.76-21.66). Acanthamoeba spp. (52.23%) and Hartmanella/Vermamoeba spp. (36.06%) were found to be more prevalent, whereas Naegleria spp. (34.98%) and Balamuthia spp. (27.32%) were less prevalent. The distribution of the highest global prevalence values for species of Acanthamoeba spp., considering different publication periods of the studies, is as follows: A. hatchetti (51.46%), A. rhysodes (47.49%), A. polyphaga (36.37%), A. culbertsoni (34.31%), A. castellanii (34.21%), and A. lenticulata (32.82%). For other FLA species, the distribution is: Hartmannella/Vermamoeba vermiformis (91.57%), Naegleria fowleri (42.32%), Naegleria gruberi (32.39%), and Balamuthia mandrillaris (25%). The most prevalent Acanthamoeba genotypes were T4 (33.38%) and T3 (23.94%). Overall, the global prevalence of FLA in solid matrices is as high as or greater than that reported in water by previous systematic reviews. Thus, actions aimed at reducing exposure to FLA or exploring their ecological dynamics should consider not only water but also the various solid matrices. The finding outlined here can provide valuable insights for such actions, e.g., informing on the level of exposure to FLA, or on the microbial biodiversity of specific environmental compartments.
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Affiliation(s)
- Beni Jequicene Mussengue Chaúque
- Graduate Program in Agricultural and Environmental Microbiology, Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Brazil; Postgraduate Program in Biological Sciences: Pharmacology and Therapeutics, UFRGS, Rio Grande do Sul, Brazil; Center of Studies in Science and Technology (NECET), Biology Course, Universidade Rovuma, Niassa Branch, Lichinga, Mozambique
| | - Thaisla Cristiane Borella da Silva
- Graduate Program in Agricultural and Environmental Microbiology, Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Brazil
| | - Denise Leal Dos Santos
- CAPES Clinical Research Pilot Program at Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Brazil
| | - Guilherme Brittes Benitez
- Industrial and Systems Engineering Graduate Program, Polytechnic School, Pontifical Catholic University of Parana (PUCPR), Brazil
| | | | | | - Régis Adriel Zanette
- Postgraduate Program in Biological Sciences: Pharmacology and Therapeutics, UFRGS, Rio Grande do Sul, Brazil
| | - Marilise Brittes Rott
- Graduate Program in Agricultural and Environmental Microbiology, Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Brazil.
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Padua MFFE, Masangkay FR, Alejandro GJD, Milanez GDJ. Detection of Acanthamoeba spp. in groundwater sources in a rural area in the Philippines. JOURNAL OF WATER AND HEALTH 2023; 21:138-146. [PMID: 36705503 DOI: 10.2166/wh.2023.258] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Research on free-living amoebae (FLA) and its public health implication as an etiologic agent of parasitic infection in humans has recently gained traction in the Philippines. This study aimed to identify potential FLAs in collected groundwater samples from Masinloc, Zambales, Philippines. Fifty-four (54) water samples were collected in 250-mL sterile polyethylene containers by purposive sampling from selected groundwater sources in six (6) barangays of Masinloc. The samples were vacuum filtered through a 1.2-μm pore glass microfiber filter, cultured onto non-nutrient agar (NNA) lawned with Escherichia coli, and observed microscopically for amoebic growth for 14 days using light microscopy. Amoebic growth was observed in 11.1% (6/54) of water samples. DNAs from positive samples were extracted and were made to react with polymerase chain reaction using Acanthamoeba-specific JDP1 (5'-GGCCCAGATCGTTTACCGTGAA-3') and JDP2 (5'-TCTCACAAGCTGCTAGGGAGTCA-3') primers, and universal primer Euk A (5'-AACCTGGTTGATCCTGCCAGT-3') and Euk B (5'-TGATCCTTCTGCAGGTTCACCTAC-3'). The presence of Acanthamoeba genotypes T4, T7, and T11 was confirmed using molecular and phylogenetic analysis. Our results confirmed that groundwater sources from two of six sampling sites (33.3%) in Masinloc, Zambales, were contaminated with potentially pathogenic FLAs. Proper identification of risk factors that may cause contamination consequently leads to the implementation of programs that will prevent future infections.
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Affiliation(s)
- Mark F F E Padua
- The Graduate School, University of Santo Tomas, Manila 1015, Philippines; Department of Medical Technology, Far Eastern University, Manila 1008, Philippines
| | - Frederick Ramirez Masangkay
- Department of Medical Technology, Faculty of Pharmacy, University of Santo Tomas, Manila 1015, Philippines E-mail:
| | | | - Giovanni De Jesus Milanez
- Department of Medical Technology, Faculty of Pharmacy, University of Santo Tomas, Manila 1015, Philippines E-mail:
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Campolo A, Pifer R, Walters R, Thomas M, Miller E, Harris V, King J, Rice CA, Shannon P, Patterson B, Crary M. Acanthamoeba spp. aggregate and encyst on contact lens material increasing resistance to disinfection. Front Microbiol 2022; 13:1089092. [PMID: 36601401 PMCID: PMC9806144 DOI: 10.3389/fmicb.2022.1089092] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 11/28/2022] [Indexed: 12/23/2022] Open
Abstract
Introduction Acanthamoeba keratitis is often caused when Acanthamoeba contaminate contact lenses and infect the cornea. Acanthamoeba is pervasive in the environment as a motile, foraging trophozoite or biocide-resistant and persistent cyst. As contact lens contamination is a potential first step in infection, we studied Acanthamoeba's behavior and interactions on different contact lens materials. We hypothesized that contact lenses may induce aggregation, which is a precursor to encystment, and that aggregated encystment would be more difficult to disinfect than motile trophozoites. Methods Six clinically and/or scientifically relevant strains of Acanthamoeba (ATCC 30010, ATCC 30461, ATCC 50370, ATCC 50702, ATCC 50703, and ATCC PRA-115) were investigated on seven different common silicone hydrogel contact lenses, and a no-lens control, for aggregation and encystment for 72 h. Cell count and size were used to determine aggregation, and fluorescent staining was used to understand encystment. RNA seq was performed to describe the genome of Acanthamoeba which was individually motile or aggregated on different lens materials. Disinfection efficacy using three common multi-purpose solutions was calculated to describe the potential disinfection resistance of trophozoites, individual cysts, or spheroids. Results Acanthamoeba trophozoites of all strains examined demonstrated significantly more aggregation on specific contact lens materials than others, or the no-lens control. Fluorescent staining demonstrated encystment in as little as 4 hours on contact lens materials, which is substantially faster than previously reported in natural or laboratory settings. Gene expression profiles corroborated encystment, with significantly differentially expressed pathways involving actin arrangement and membrane complexes. High disinfection resistance of cysts and spheroids with multi-purpose solutions was observed. Discussion Aggregation/encystment is a protective mechanism which may enable Acanthamoeba to be more disinfection resistant than individual trophozoites. This study demonstrates that some contact lens materials promote Acanthamoeba aggregation and encystment, and Acanthamoeba spheroids obstruct multi-purpose solutions from disinfecting Acanthamoeba.
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Affiliation(s)
| | - Reed Pifer
- Alcon Research, LLC, Fort Worth, TX, United States
| | | | - Megan Thomas
- Alcon Research, LLC, Fort Worth, TX, United States
| | - Elise Miller
- Alcon Research, LLC, Fort Worth, TX, United States
| | | | - Jamie King
- Alcon Research, LLC, Fort Worth, TX, United States
| | - Christopher A. Rice
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, IN, United States,Purdue Institute for Drug Discovery (PIDD), Purdue University, West Lafayette, IN, United States,Purdue Institute of Inflammation, Immunology and Infectious Disease (PI4D), Purdue University, West Lafayette, IN, United States
| | - Paul Shannon
- Alcon Research, LLC, Fort Worth, TX, United States
| | | | - Monica Crary
- Alcon Research, LLC, Fort Worth, TX, United States,*Correspondence: Monica Crary,
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Distribution and Current State of Molecular Genetic Characterization in Pathogenic Free-Living Amoebae. Pathogens 2022; 11:pathogens11101199. [PMID: 36297255 PMCID: PMC9612019 DOI: 10.3390/pathogens11101199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/03/2022] [Accepted: 10/15/2022] [Indexed: 11/17/2022] Open
Abstract
Free-living amoebae (FLA) are protozoa widely distributed in the environment, found in a great diversity of terrestrial biomes. Some genera of FLA are linked to human infections. The genus Acanthamoeba is currently classified into 23 genotypes (T1-T23), and of these some (T1, T2, T4, T5, T10, T12, and T18) are known to be capable of causing granulomatous amoebic encephalitis (GAE) mainly in immunocompromised patients while other genotypes (T2, T3, T4, T5, T6, T10, T11, T12, and T15) cause Acanthamoeba keratitis mainly in otherwise healthy patients. Meanwhile, Naegleria fowleri is the causative agent of an acute infection called primary amoebic meningoencephalitis (PAM), while Balamuthia mandrillaris, like some Acanthamoeba genotypes, causes GAE, differing from the latter in the description of numerous cases in patients immunocompetent. Finally, other FLA related to the pathologies mentioned above have been reported; Sappinia sp. is responsible for one case of amoebic encephalitis; Vermamoeba vermiformis has been found in cases of ocular damage, and its extraordinary capacity as endocytobiont for microorganisms of public health importance such as Legionella pneumophila, Bacillus anthracis, and Pseudomonas aeruginosa, among others. This review addressed issues related to epidemiology, updating their geographic distribution and cases reported in recent years for pathogenic FLA.
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Masangkay FR, Milanez GD, Dionisio JD, Ormita LAGL, Alvarez AV, Karanis P. Well water sources simultaneous contamination with Cryptosporidium and Acanthamoeba in East-Southeast Asia and Acanthamoeba spp. in biofilms in the Philippines. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 837:155752. [PMID: 35533862 DOI: 10.1016/j.scitotenv.2022.155752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 04/05/2022] [Accepted: 05/02/2022] [Indexed: 06/14/2023]
Abstract
Cryptosporidium is the leading agent of waterborne parasitic protozoan outbreaks and is the second leading cause of infant mortality due to diarrhoea worldwide. Acanthamoeba spp. causes Acanthamoeba keratitis (AK) and a life-threatening condition known as granulomatous amoebic encephalitis (GAE). The present study aimed to assess the water quality of an indigenous and a rural community for waterborne parasitic protozoan contamination. Aquatic samples (n = 22) were processed by filtration of 500 mL portion through a 1.2 μm pore size glass microfiber filter and eluted for light microscopy, culture in non-nutrient agar, and PCR analysis. Overall, 36% (8/22) of the investigated aquatic samples were positive for either Cryptosporidium spp. oocysts (13%; 3/22) or Acanthamoeba spp., (36%; 8/22) or both (13%; 3/22). Cryptosporidium spp. oocysts were detected in 27% (3/11) of wet season samples only while Acanthamoeba spp. were detected in 18% (2/11) and 55% (6/11) of wet and dry season samples, respectively. Subsequently, molecular detection for Acanthamoeba species identified A. lenticulata and A. hatchetti with 98-99% BLAST similarity. This is the first report on the simultaneous contamination of Cryptosporidium and Acanthamoeba in well water sources in East-Southeast Asia, the first detection of Acanthamoeba spp. in biofilms in the Philippines, and the longest viability demonstrated for A. lenticulata in two-year-old water samples stored at room temperature.
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Affiliation(s)
- Frederick R Masangkay
- Department of Medical Technology, Faculty of Pharmacy, University of Santo Tomas, Manila 1008, Philippines.
| | - Giovanni D Milanez
- Department of Medical Technology, Faculty of Pharmacy, University of Santo Tomas, Manila 1008, Philippines
| | - Joseph D Dionisio
- Department of Medical Technology, Far Eastern University-Manila, Manila 1015, Philippines
| | - Luzelle Anne G-L Ormita
- Department of Psychology, Far Eastern University-Manila, Manila 1015, Philippines; Community Extension Services, Far Eastern University-Manila, Manila 1015, Philippines
| | - Abel V Alvarez
- Community Extension Services, Far Eastern University-Manila, Manila 1015, Philippines
| | - Panagiotis Karanis
- University of Cologne, Faculty of Medical and University Hospital Cologne, Cologne 50923, Germany; Medical School, Department of Basic and Clinical Science, University of Nicosia, Nicosia, 2417, Cyprus.
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Milanez GD, Masangkay FR, Martin I GL, Hapan MFZ, Manahan EP, Castillo J, Karanis P. Epidemiology of free-living amoebae in the Philippines: a review and update. Pathog Glob Health 2022; 116:331-340. [PMID: 35112656 PMCID: PMC9387320 DOI: 10.1080/20477724.2022.2035626] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Free-living amoebae (FLA) are considered environmental pathogens and thus pose a public health threat. Their ubiquity in natural sources may magnify the potential severity of health outcomes in the future. However, less attention was given despite several probable public health risks that arise from the presence of pathogenic strains in the environment. Here, we provide epidemiological data based on investigations involving the distribution and occurrence of free-living amoebae in the Republic of the Philippines. This aims to connect data of fragmented studies of these organisms and provide potential roadmaps in FLA research in the country. The majority of the reviewed articles (n = 19) focused on characterization studies (36.8%; 7/19) while environmental isolation and isolation from biological samples had an equal frequency of 31.6% (6/19) each. There is a great disparity between the established ubiquity in environmental sources and the number of cases of FLA infections in the country. FLA-related research in the Philippines is still in its inceptive stage with several gaps to fill, which can be used to formulate policy briefs in the future regarding its isolation, identification, diagnosis, therapeutic management, and control of FLA infections in the country.
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Affiliation(s)
- Giovanni D. Milanez
- Department of Medical Technology, Faculty of Pharmacy, University of Santo Tomas, Manila, Philippines,CONTACTGiovanni D. Milanez Department of Medical Technology, Faculty of Pharmacy, University of Santo Tomas, Manila1015, Philippines
| | - Frederick R. Masangkay
- Department of Medical Technology, Faculty of Pharmacy, University of Santo Tomas, Manila, Philippines
| | - Gregorio L. Martin I
- Department of Medical Technology, Faculty of Pharmacy, University of Santo Tomas, Manila, Philippines
| | - Ma. Frieda Z Hapan
- Department of Medical Technology, Faculty of Pharmacy, University of Santo Tomas, Manila, Philippines
| | - Edilberto P. Manahan
- Department of Medical Technology, Faculty of Pharmacy, University of Santo Tomas, Manila, Philippines
| | | | - Panagiotis Karanis
- Medical Faculty, University of Cologne, Cologne, Germany,Department of Basic and Clinical Science, University of Nicosia Medical School, Nicosia, Cyprus
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Ballares LD, Masangkay FR, Dionisio J, Villaflores O, Pineda-Cortel MR, Milanez GD. Molecular detection of Acanthamoeba spp. in Seven Crater Lakes of Laguna, Philippines. JOURNAL OF WATER AND HEALTH 2020; 18:776-784. [PMID: 33095200 DOI: 10.2166/wh.2020.146] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Acanthamoeba spp. are ubiquitous free-living amoeba with genotypes that cause severe pathology of the eyes, central nervous systems, and rare reports of cutaneous infections. The Seven Crater Lakes are freshwater water resources in Laguna, Philippines primarily used for aquaculture and tourism. A total of 16 surface water samples were collected from different sampling areas per Crater Lake and placed in sterile plastic containers. Samples were filtered using 1.2 μm pore size, glass microfiber filter. Filtered sediments were placed on non-nutrient agar lawned with Escherichia coli and incubated aerobically at 35 °C for 14 days. Six out of 16 water samples exhibited amoebic growth. Cystic stages revealed circular to stellate morphology under light microscopy which were initially classified as Acanthamoeba spp. DNA from positive isolates were made to react with polymerase chain reaction using Acanthamoeba specific primers JDP1 5′-GGCCCAGATCGTTTACCGTGAA-3′ and JDP2 5′-TCTCACAAGCTGCTAGGGAGTCA-3′confirmed the presence of several Acanthamoeba species. Phylogenetic analysis revealed the presence of seven isolates belonging to Acanthamoeba genotypes T4, T5, and T9. The presence of potentially pathogenic Acanthamoeba genotypes in the Seven Crater Lakes of Laguna signifies risk to human health which necessitates the development of programs, policies, and guidelines on the understanding, prevention, and management of potential human infections.
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Affiliation(s)
- Lea D Ballares
- The Graduate School, Royal and Pontifical University of Santo Tomas, Manila 1015, Philippines E-mail: ; Department of Medical Technology, Far Eastern University-Manila, Manila 1015, Philippines
| | - Frederick R Masangkay
- Department of Medical Technology, Far Eastern University-Manila, Manila 1015, Philippines
| | - Joseph Dionisio
- Department of Medical Technology, Far Eastern University-Manila, Manila 1015, Philippines
| | - Oliver Villaflores
- The Graduate School, Royal and Pontifical University of Santo Tomas, Manila 1015, Philippines E-mail:
| | - Maria Ruth Pineda-Cortel
- The Graduate School, Royal and Pontifical University of Santo Tomas, Manila 1015, Philippines E-mail:
| | - Giovanni D Milanez
- Department of Medical Technology, Far Eastern University-Manila, Manila 1015, Philippines
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Bunsuwansakul C, Mahboob T, Hounkong K, Laohaprapanon S, Chitapornpan S, Jawjit S, Yasiri A, Barusrux S, Bunluepuech K, Sawangjaroen N, Salibay CC, Kaewjai C, Pereira MDL, Nissapatorn V. Acanthamoeba in Southeast Asia - Overview and Challenges. THE KOREAN JOURNAL OF PARASITOLOGY 2019; 57:341-357. [PMID: 31533401 PMCID: PMC6753290 DOI: 10.3347/kjp.2019.57.4.341] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Accepted: 07/18/2019] [Indexed: 12/21/2022]
Abstract
Acanthamoeba, one of free-living amoebae (FLA), remains a high risk of direct contact with this protozoan parasite which is ubiquitous in nature and man-made environment. This pathogenic FLA can cause sight-threatening amoebic keratitis (AK) and fatal granulomatous amoebic encephalitis (GAE) though these cases may not commonly be reported in our clinical settings. Acanthamoeba has been detected from different environmental sources namely; soil, water, hot-spring, swimming pool, air-conditioner, or contact lens storage cases. The identification of Acanthamoeba is based on morphological appearance and molecular techniques using PCR and DNA sequencing for clinico-epidemiological purposes. Recent treatments have long been ineffective against Acanthamoeba cyst, novel anti-Acanthamoeba agents have therefore been extensively investigated. There are efforts to utilize synthetic chemicals, lead compounds from medicinal plant extracts, and animal products to combat Acanthamoeba infection. Applied nanotechnology, an advanced technology, has shown to enhance the anti-Acanthamoeba activity in the encapsulated nanoparticles leading to new therapeutic options. This review attempts to provide an overview of the available data and studies on the occurrence of pathogenic Acanthamoeba among the Association of Southeast Asian Nations (ASEAN) members with the aim of identifying some potential contributing factors such as distribution, demographic profile of the patients, possible source of the parasite, mode of transmission and treatment. Further, this review attempts to provide future direction for prevention and control of the Acanthamoeba infection.
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Affiliation(s)
- Chooseel Bunsuwansakul
- School of Allied Health, Southeast Asia Water Team (SEA Water Team) and World Union for Herbal Drug Discovery (WUHeDD), Walailak University, Nakhon Si Thammarat, Thailand
| | - Tooba Mahboob
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Kruawan Hounkong
- Department of Microbiology, Princess of Naradhiwas University, Narathiwat, Thailand
| | | | | | - Siriuma Jawjit
- School of Public Health, Walailak University, Nakhon Si Thammarat, Thailand
| | - Atipat Yasiri
- Chulabhorn International College of Medicine, Thammasat University, Pathum Thani, Thailand
| | - Sahapat Barusrux
- School of Allied Health, Southeast Asia Water Team (SEA Water Team) and World Union for Herbal Drug Discovery (WUHeDD), Walailak University, Nakhon Si Thammarat, Thailand
| | - Kingkan Bunluepuech
- School of Allied Health, Southeast Asia Water Team (SEA Water Team) and World Union for Herbal Drug Discovery (WUHeDD), Walailak University, Nakhon Si Thammarat, Thailand
| | | | - Cristina C Salibay
- College of Science and Computer Studies, De La Salle University-Dasmarinas, Dasmarinas City, Cavite, Philippines
| | - Chalermpon Kaewjai
- Faculty of Medical Technology, Rangsit University, Pathum Thani, Thailand
| | - Maria de Lourdes Pereira
- Department of Medical Sciences & CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
| | - Veeranoot Nissapatorn
- School of Allied Health, Southeast Asia Water Team (SEA Water Team) and World Union for Herbal Drug Discovery (WUHeDD), Walailak University, Nakhon Si Thammarat, Thailand
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