Chanthol Peng

Tokyo Institute of Technology | TITech · Life Science and Technology

Understanding the variability of bacterial communities in lake ecosystems is important as they play numerous roles, e.g., microbial loop and biodegradation of organic contaminants. Rapid bacterial responses to environmental conditions can thus influence the whole lake ecosystems and indirectly affect other communities in the environments. This chap...

Antibiotics are the most potent drugs in the treatment of infections caused by bacteria. However, the rapid emergence of antibiotic-resistant bacteria (ARB) occurs worldwide, and ARB has become a threat to public health. Particularly in the floating villages in the Tonle Sap Lake (TSL), if pathogens associated with waterborne infection show resista...

Access to clean drinking water remains one of the major problems for the floating villages around Tonle Sap Lake. The lake water around houses in these villages was reported to be contaminated from their domestic wastewater; however, villagers still need to use the lake water for their daily life. Moreover, conventional treatment cannot efficiently...

Tonle Sap Lake, the largest freshwater body in Southeast Asia, plays an important role in lives and environment. The lake is reportedly under anthropogenic pressure and suffer from eutrophication. The floating villagers suffer from waterborne diseases. However, the shift in bacterial community due to human activities in this great lake has not yet...

This study is aimed to evaluate the price and quality control of different soy sauces sold in the markets. Four local markets and five supermarkets were selected to survey the price and collecting samples. To analyze the quality of soy sauce, pH, salt content, soluble salt - free solid, reducing sugar, total nitrogen, amino acid nitrogen, halophili...

Tonle Sap Lake (TSL), the largest lake in South East Asia, is under increasing pressure from pollution, land-use change, climate change, and development activities in the lake, its basin and the Mekong Basin. Recent changes in the lake hydrological system and its floodplains are becoming a great concern for hundreds of communities relying on the la...

Harmful bacteria and algae have been detected in the lake and surrounding waters with the help of a novel analytical approach developed in this project. Their extended survival in the lake water increases the vulnerability of the people living in floating villages. In addition to the intensive investigation of those pathogenic microbes in different...

Harmful bacteria and algae have been detected in the lake and surrounding waters with the help of a novel analytical approach developed in this project. Their extended survival in the lake water increases the vulnerability of the people living in floating villages. In addition to the intensive investigation of those pathogenic microbes in different...

The emergence of life-threatening methicillin-resistant Staphylococcus aureus (MRSA) has led to increased interest in the use of bacteriophages as an alternative therapy to antibiotics. The success of phage therapy is greatly dependent on the selected phage possessing a wide host range. This study describes phage ɸMR003 isolated from sewage influen...

Tonle Sap Lake, the largest freshwater body in Southeast Asia, plays an important role in lives and environment. The lake is reportedly under anthropogenic pressure and suffers from eutrophication. The floating villagers suffer from waterborne diseases. However, the shift in bacterial community due to human activities in this great lake has not yet...

Tonle Sap lake in Cambodia is the biggest lake in Southeast Asia. It is estimated that this lake accounts for ca. 60% of domestic protein needs and more than 1 million people stay at the floating villages on the lake. However, they use the lake water directly without sufficient treatments. Therefore, they are under threat of unsanitary water enviro...

Microbial community is a group of microbial species that share a common space. One of the important focuses of research about those microbes is the mechanistic understanding of their interactions with environment. Therefore, we investigated the relationship between microbial community and physico-chemical factors in a large tropical shallow lake, T...

Staphylococcus aureus is one of the leading human and animal pathogens. It can cause skin infection, pneumonia, bloodstream infections in human as well as cause mastitis in bovine which affect milk quality and lead to huge economic losses in dairy industry. Overuse and misuse of antibiotic for treatment of S.aureus have provoked Methicillin- Resist...

Tracing the fate of pathogens in environmental water, particularly in wastewater, with a suitable methodology is a demanding task. We investigated the fate of Escherichia coli K12 in sewage influent and activated sludge using a novel approach that involves the application of a biologically stable dialysis device. The ion concentrations inside the d...

Antibiotics have saved millions of lives by protecting against infectious diseases. Recently, however, the rapid emergence of antibiotic resistant bacteria is occurring worldwide and it becomes a threat. Especially, in the water environment, if the pathogens associated waterborne infection show a resistance against antibiotics, they are severe prob...

There are many concern about the proliferation of virulent enteric microorganism and the bloom of cyanobacteria in the environment water. Health risk, environmental vulnerability has captured the attention since the water source is being threaten by the human activities such as industry, agriculture or the discharge of wastewater from the city. Abo...

Listeria monocytogenes is a foodborne pathogen associated with fermented products. The aim of this study was to characterize anti-listerial bacteriocin produced by lactic acid bacteria (LAB) isolated from Cambodian fermented foods. Four LAB isolates of confirmed bacteriocin production were isolated from fermented fish and shrimp (pha ak trey, ph...

In this study, behaviors of emission sources in cities in Cambodia such as seasonal and hourly behaviors were discussed using the above carbon indices. Carbon components in particles emitted from motor-cycles with 4-stroke engines (new and old) and from a grass cutter with a 2-stroke engine were also analyzed to discuss influences of oil mist from...