Publications by authors named "Wetpisit Chanmol"

Article Synopsis
  • Leishmaniasis is a tropical disease caused by parasites and spread by infected sand fly bites, with current treatments having significant side effects.
  • This study assesses the interactions between artesunate (AS) and three antileishmanial drugs: amphotericin B (AmB), miltefosine (MF), and paromomycin (PM), using the Chou-Talalay combination index method.
  • Results showed that AS combined with AmB and MF can be synergistic, potentially improving treatment strategies, while its combination with PM was antagonistic, highlighting the need for further research on optimizing these drug combinations.
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Background: Burkholderia pseudomallei, a Gram-negative pathogen, causes melioidosis. Although various clinical laboratory identification methods exist, culture-based techniques lack comprehensive evaluation. Thus, this systematic review and meta-analysis aimed to assess the diagnostic accuracy of culture-based automation and non-automation methods.

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() is a human pathogen causing leishmaniasis and studies on the properties of metacyclic promastigotes, the parasite's infective stage, are required for a better understanding of its transmission and infection. However, information on cultivation for mass production of metacyclic promastigotes and factors that stimulate their metacyclogenesis is limited. Therefore, the objective of this study was to develop a suitable methodology for generating promastigote cultures containing a high proportion and number of metacyclic promastigotes.

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() is responsible for visceral leishmaniasis in patients with no known underlying immunodeficiency, and visceral or disseminated cutaneous leishmaniasis in HIV-infected patients. The available anti- drugs for treatment have limitations such as high toxicity and variable efficacy. To improve the therapeutic index of anti- drugs, the search for a new drug or a new natural compound in combination therapy instead of using monotherapy to reduce drug side effect and have high efficacy is required.

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Leishmaniasis is an emerging disease in several countries over the world, especially in tropical regions. In Thailand, Leishmania (Mundinia) martiniquensis is the most frequent cause of visceral leishmaniasis and disseminated cutaneous leishmaniasis among HIV/AIDs patients. Amphotericin B (AmB) is the only drug currently available for the treatment of leishmaniasis in Thailand, but has some limitations like high renal toxicity and the prolonged hospitalization required for the treatment.

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Background: Malaria and visceral leishmaniasis (VL) co-infection can occur due to the overlapping geographical distributions of these diseases; however, only limited data of this co-infection have been reported and reviewed. This study aimed to explore the pooled prevalence and characteristics of this co-infection using a systematic review approach.

Methods: The PubMed, Web of Science and Scopus databases were searched for relevant studies.

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Our objective was to investigate clinical progression, presence of parasites and DNAs, parasite loads, and histological alterations in BALB/c mice and Syrian golden hamsters after intraperitoneal inoculation with Leishmania (Mundinia) martiniquensis promastigotes with a goal to choosing an appropriate animal model for visceral leishmaniasis. Infections were monitored for 16 weeks. Infected BALB/c mice were asymptomatic during the infection course.

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() is a causative agent of visceral leishmaniasis, but in HIV-infected patients both visceral and disseminated cutaneous leishmaniasis are presented. Recurrence of the disease after treatment has been reported in some cases indicating that improved chemotherapy is required. In this study, the susceptibility of to Amphotericin B deoxycholate (AmB), allicin, and andrographolide was evaluated and the synergistic effects of allicin or andrographolide combined with AmB against intracellular amastigotes in mouse peritoneal exudate macrophages (PEMs) were investigated in vitro for the first time.

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Leishmania (Mundinia) orientalis is a newly described species causing human leishmaniasis in Thailand whose natural vector is unknown. L. orientalis infections in sand flies and/or biting midges under laboratory conditions have not been previously investigated.

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Leishmania (Mundinia) orientalis is a recently described new species that causes leishmaniasis in Thailand. To facilitate characterization of this new species, an in vitro culture system to generate L. orientalis axenic amastigotes was developed.

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Article Synopsis
  • Leishmaniasis is emerging in Thailand, with only about 20 clinically confirmed cases, suggesting a potentially high prevalence that could include many undetected infections, especially in immunocompromised individuals.
  • The research identified a new species, Leishmania (Mundinia) orientalis, from a biopsy of a patient in Nan Province and provided a formal description which replaces the previously invalid species "Leishmania siamensis."
  • Currently, three species causing leishmaniasis have been recognized in Thailand: L. martiniquensis, L. orientalis, and L. infantum, paving the way for further epidemiological studies.
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The ultrastructure of the midgut of fourth instar Ochlerotatus togoi was investigated by light, scanning and transmission electron microscopy. This study was performed to provide information to help devise future control efforts aimed at the larval stages of this vector of filariasis. The fourth instar midgut was approximately 2 mm in length and consisted of three morphologically distinct cell types: epithelial, regenerative, and endocrine cells.

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Malaria sporozoites must invade the salivary glands of mosquitoes for maturation before transmission to vertebrate hosts. The duration of the sporogonic cycle within the mosquitoes ranges from 10 to 21 days depending on the parasite species and temperature. During blood feeding salivary gland proteins are injected into the vertebrate host, along with malaria sporozoites in the case of an infected mosquito.

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The mosquito midgut is the first site that vector-borne pathogens contact during their multiplication, differentiation, or migration from blood meal to other tissues before transmission. After blood feeding, the mosquitoes synthesize a chitinous structure called peritrophic matrix (PM) that envelops the blood meal and separates the food bolus from the midgut epithelium. In this study, a systematic investigation of the PM formation and the interaction of Brugia malayi within the midgut of a susceptible vector, Ochlerotatus togoi, were performed using scanning electron microscopy (SEM).

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