Probiotics and Competitive Exclusion: 6 Revolutionary Tools for Future Researchers
In the evolving landscape of biomedical and health sciences, the integration of probiotics and competitive exclusion (CE) principles continues to offer transformative potential, particularly in the field of Tropical Medicine. The College of Graduate Studies at Walailak University stands at the forefront of this advancement, empowering researchers—especially Ph.D. candidates—with cutting-edge expertise and a rich body of published scientific evidence. This article presents six revolutionary tools and approaches developed through the College’s doctoral research that are shaping the future of probiotics and CE in health sciences.
1. Microbiota-Based Diagnostics for Tropical Disease Management
Doctoral researchers at Walailak University are pioneering the use of gut microbiota profiles as diagnostic tools for early detection of infectious and non-infectious diseases common in tropical regions. Through their work, the role of probiotics in stabilizing microbiota disrupted by parasitic infections or antibiotic misuse has been rigorously explored. Their findings are increasingly contributing to diagnostic frameworks that are non-invasive, cost-effective, and suitable for deployment in low-resource settings.
2. Next-Generation Probiotic Formulations
Ph.D. scholars have developed formulations of next-generation probiotics, including spore-forming strains and genetically characterized lactic acid bacteria. These are tailored for high heat and humidity tolerance, making them effective for application in tropical climates. These advancements are backed by peer-reviewed articles that demonstrate not only the safety but also the targeted antimicrobial action against pathogens prevalent in Southeast Asia, such as Salmonella, E. coli, and Clostridium perfringens.
3. Competitive Exclusion in Antimicrobial Resistance (AMR) Mitigation
Through CE mechanisms, Ph.D. students have identified strategies for reducing antibiotic-resistant pathogens in both clinical and agricultural settings. Their work shows how carefully selected probiotics can outcompete resistant strains in the gut, offering a natural and sustainable alternative to antibiotics. This research has been cited in national discussions on Thailand’s AMR action plans, reinforcing the College’s impact on public health policy.
4. Probiotic Delivery Innovations for Tropical Populations
Recognizing the logistical challenges in tropical medicine delivery systems, doctoral candidates are developing oral and microencapsulated probiotic delivery tools that preserve viability in extreme environments. This includes the design of synbiotic combinations for targeted colon delivery, enhancing the survivability of probiotics while maximizing their health benefits. These tools support long-term disease prevention strategies and nutritional therapies in under-resourced communities.
5. Gut-Brain Axis Modulation Through CE
Researchers from the College’s Ph.D. program have been investigating the influence of probiotics and CE on the gut-brain axis, particularly in relation to tropical stress-related conditions such as malnutrition, chronic infections, and post-infection syndromes. By modifying gut microbiota, they aim to alleviate symptoms of inflammation-driven cognitive and psychological disorders—a cutting-edge area of study that connects microbiology, neuroscience, and tropical medicine.
6. Sustainable Use of CE in Livestock and Zoonotic Disease Control
With zoonotic diseases presenting significant challenges in tropical regions, the application of CE strategies in livestock has proven essential. Ph.D. candidates have contributed impactful research on using probiotics to prevent colonization of zoonotic pathogens in animals, reducing transmission to humans. Their findings, published in internationally indexed journals, support global efforts to improve One Health strategies through integrated human-animal-environment health interventions.
Conclusion
The College of Graduate Studies at Walailak University exemplifies academic excellence and research leadership in probiotics and competitive exclusion within the framework of tropical medicine. With their compelling scientific outputs, Ph.D. scholars are not only advancing theoretical knowledge but also offering practical tools and real-world solutions that can be implemented in both local and international health systems. For educators and researchers in Master’s and Doctoral programs across health sciences, Walailak University presents a rich environment of collaborative research, innovation, and academic mentorship.
Articles
Development of a microencapsulated probiotic containing Pediococcus acidilactici WU222001 against avian pathogenic Escherichia coli
Background and Aim: Probiotics are beneficial microorganisms for humans and animals. In this study, we developed a microencapsulated probiotic with antibacterial activity against avian pathogenic Escherichia coli (APEC). Materials and Methods: Alignment of the 16S rRNA sequences of the isolate WU222001 with those deposited in GenBank revealed that the isolate was Pediococcus acidilactici with 99.6% homology. This bacterium was characterized as a probiotic based on its tolerance toward in vitro gastrointestinal tract (GIT) conditions, hydrophobicity, and auto-aggregation….
Isolation and Characterization of a Novel Escherichia Bacteriophage with Potential to Control Multidrug-Resistant Avian Pathogenic Escherichia coli and Biofilms
Background/Objectives: Avian pathogenic Escherichia coli (APEC) infection is a significant problem for the global chicken industry, as it decreases animal welfare and is associated with substantial economic losses. Traditionally, APEC infections have been controlled through the use of antibiotics, which has led to an increased prevalence of antibiotic-resistant E. coli. Therefore, developing alternative treatments for APEC infection is crucial. Methods: In this study, an Escherichia phage specific to multidrug-resistant (MDR) APEC, designated as phage vB_EcoP_PW8 (phage vECPW8), was isolated. The morphology, phage adsorption to host cells, one-step growth curve, thermal stability, pH stability, whole-genome sequencing, antibacterial ability, and antibiofilm efficacy of phage vECPW8 were evaluated. Results: The results demonstrated that….
Research
Antibacterial, antibiofilm, and anti-adhesion activities of Piper betle leaf extract against Avian pathogenic Escherichia coli
Piperbetle leaves have traditionally been used to treat many diseases, including bacterial infections. The present study aimed to investigate the antibacterial, antibiofilm, and anti-adhesion activities of P.betle extract against avian pathogenic Escherichiacoli (APEC). The ethanol extract of P.betle leaves demonstrated strong antibacterial activity against clinical isolates of APEC with MIC and MBC values ranging from 0.5 to 1.0 mg/mL as compared with 1% DMSO, a negative control. Disruption and breakdown of the bacterial cells were detected when the cells were challenged with the extract at 2 × MIC. Bacterial cells treated with the extract demonstrated longer cells without a septum, compared to the control….
Sangyod rice bran extract enhances Lacticaseibacillus paracasei growth during the exponential phase and antibacterial activity of L. paracasei supernatant against zoonotic and foodborne pathogens
Background and Aim: Prebiotics are a group of nutrients or compounds that are degraded by the gut microbiota, including Lacticaseibacillus paracasei. The probiotic plays an important role in adhesion to the gut and is able to produce antimicrobial substances to inhibit pathogens. This study aimed to investigate the effects of Sangyod rice bran extract on the growth promotion of L. paracasei. Furthermore, antibacterial activity of the extract and L. paracasei supernatants cultured in De Man, Rogosa and Sharpe (MRS) medium plus the extract against zoonotic and foodborne pathogens was investigated. Materials and Methods: Antibacterial activity of the crude extract and the oil from Sangyod rice bran against….
Probiotics and Competitive Exclusion (CE)
Probiotics and Competitive Exclusion (CE)
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Doctor of Philosophy Program in Health Sciences (International Program)