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Publication Metadata only Notes on the aquatic ecology of Lithoglyphopsis aperta(1976-12-01) V. Kitikoon; C. R. Schneider; Mahidol UniversityPublication Metadata only Zygomycetes and Pythium spp., an aquatic phycomycetes isolated from patients and their host defense mechanism.(1989-07-01) D. Tanphaichitra; S. Srimuang; Y. Siristonpun; Mahidol UniversityPublication Metadata only Emerging contaminants in aquatic environments and coastal waters affected by urban wastewater discharge in Thailand: An ecological risk perspective(2020-11-01) Kanokthip Juksu; You Sheng Liu; Jian Liang Zhao; Li Yao; Charoon Sarin; Siranee Sreesai; Pantip Klomjek; Atsadang Traitangwong; Guang Guo Ying; Guangzhou Institute of Geochemistry Chinese Academy of Sciences; University of Chinese Academy of Sciences; Naresuan University; Mahidol University; South China Normal University; Guangdong Provincial Key Laboratory of Emergency Test for Dangerous Chemicalsinvestigated in eight full-scale sewage treatment plants (STPs) and their receiving aquatic environments in Bangkok and Pattaya, Thailand. All target compounds were detected in every single sample from STPs and surface water with magnitude from ng/L to μg/L... xylene, 4-MBC and OC may pose high risk to aquatic organisms in the riverine and estuarine environment in Thailand.Publication Metadata only Infection of aquatic hydrobiid snails and animals with Schistosoma japonicum-like parasites from Khong Island, Southern Laos(1972-01-01) Chamlong Harinasuta; Santasiri Sornmani; Viroj Kitikoon; Curt R. Schneider; Ounhuan Pathammavong; Mahidol University; Smithsonian Institution; Service National de Laboratoires de Santé PubliquePublication Metadata only Pila Ampullacea and Pomacea Canaliculata, as new paratenic hosts of Gnathostoma spinigerum(2009-03-01) Chalit Komalamisra; Supaporn Nuamtanong; Paron Dekumyoy; Mahidol UniversityAquatic snails, Pila ampullacea and Pomacea canaliculata were experimentally found to be suitable paratenic hosts for advanced third-stage larvae (L3) of the nematode Gnathostoma spinigerum, the causative parasite of gnathostomiasis in humans. G.... spinigerum (L3) were found to be encapsulated in the tissue of the snail's foot and its internal organs. The infection, intensity and survival of third-stage larvae of G. spinigerum in both species of aquatic snails are described. This is the first evidencePublication Metadata only Bioaccumulation of heavy metals in water, sediments, aquatic plant and histopathological effects on the golden apple snail in Beung Boraphet reservoir, Thailand(2012-12-01) Vipawee Dummee; Maleeya Kruatrachue; Wachareeporn Trinachartvanit; Phanwimol Tanhan; Prayad Pokethitiyook; Praneet Damrongphol; Mahidol University; Center for Environmental Health; Kasetsart UniversityChanges in the seasonal concentrations of heavy metals (Cu, Mn, Fe, Zn, Pb and Cd) were determined in water, sediments, snails (Pomacea canaliculata) and aquatic plants (Ipomoea aquatica) in three selected tributaries of the Beung Boraphet reservoirPublication Metadata only The enterotoxigenicity of vibrio fluvialis isolated from aquatic sources in Thailand(1985-10-31) O. Suthienkul; M. Ohashi; S. Goto; S. C. Sanyal; P. Echeverria; Mahidol UniversityVibrio fluvialis strains were isolated from 31 (26%) of 120 water samples collected in Samut Prakarn, Thailand, between August 1982 and July 1983. The monthly isolation rate of V. fluvialis from water was high in January, July and August. All 69 strains were anaerogenic. Examined in a rabbit ileal loop assay were 34 of the 69 water isolates, as well as 41 strains previously isolated by others in Asia from diarrhoea patients, six from persons without diarrhoea, and five from animals. Twenty-nine per cent (12/41) of V. fluvialis isolates from diarrhoea patients and only nine per cent (3/34) of isolates from water caused distension of ≥1.0 cm/mL in rabbit ileal loops (p<0.025). The results suggest that V. fluvialis prevalence in water varies during the year in Thailand, and that isolates from water are less enterotoxigenic, as determined by rabbit ileal loop tests, than are isolates from diarrhoea patients.Publication Metadata only A search for anti-naegleria fowleri agents based on competitive exclusion behavior of microorganisms in natural aquatic environments(2021-02-01) Pichet Ruenchit; Narisara Whangviboonkij; Hathai Sawasdipokin; Uraporn Phumisantiphong; Wanpen Chaicumpa; Vajira Hospital; Faculty of Medicine Siriraj Hospital, Mahidol UniversityNaegleria fowleri causes deadly primary amoebic meningoencephalitis (PAM) in humans. Humans obtain the infection by inhaling water or dust contaminated with amebae into the nostrils, wherefrom the pathogen migrates via the olfactory nerve to cause brain inflammation and necrosis. Current PAM treatment is ineffective and toxic. Seeking new effective and less toxic drugs for the environmental control of the amoeba population to reduce human exposure is logical for the management of N. fowleri infection. On the basis of the concept of competitive exclusion, where environmental microorganisms compete for resources by secreting factors detrimental to other organisms, we tested cell-free culture supernatants (CFSs) of three bacteria isolated from a fresh water canal, i.e., Pseudomonas aeruginosa, Pseudomonas otitidis, and Enterobacter cloacae, were tested against N. fowleri. The CFSs inhibited growth and caused morphological changes in N. fowleri. At low dose, N. fowleri trophozoites exposed to P. aeruginosa pyocyanin were seen to shrink and become rounded, while at high dose, the trophozoites were fragmented. While the precise molecular mechanisms of pyocyanin and products of P. otitidis and E. cloacae that also exert anti-N. fowleri activity await clarification. Our findings suggest that P. aeruginosa pyocyanin may have a role in the control of amphizoic N. fowleri in the environment.Item Metadata only Microplastic contamination and removal efficiency in greywater treatment using a membrane bioreactor(2025-01-01) Ittisupornrat S.; Namyuang C.; Phetrak A.; Sriromreun P.; Theepharaksapan S.; Ittisupornrat S.; Mahidol UniversityMicroplastic (MP) contamination in aquatic environments is a critical concern due to its potential effects on aquatic ecosystems. MP contamination is often unsatisfactorily eliminated using conventional wastewater treatment systems. Membrane... crucial step toward safeguarding aquatic ecosystems and preserving environmental integrity with respect to the corresponding increase in MP pollution.Publication Metadata only Mosquito larvae and associated macroorganisms occurring in gem pits in southern Tha Mai District, Chanthaburi Province, Thailand.(1993-03-01) S. Kitthawee; J. D. Edman; E. S. Upatham; Mahidol UniversityAquatic field studies were conducted in Tha Mai District, Chanthaburi Province, Thailand. Larval habitats of Anopheles dirus were examined from November 1986 through June 1988 in 42 manmade gem pits. Larvae were found in pits containing clear water... under full or partial shade. The abundance of different kinds of mosquito larvae were related to seasonal changes in these aquatic habitats. Variations in An. dirus density and occurrence were related to predators populations, ie Notonectidae and fish.