SIRIPHAN BOONSILP
Department of Clinical Pathology, Faculty of Medicine, Vajira Hospital, Navamindradhiraj University. Kao Rd., Dusit, Bangkok 10300, Thailand

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

Detection of Staphylococcus aureus from contact surfaces of public buses in Bangkok and metropolitan area, Thailand NARUMON BOONMAN; JARUWAN CHUTRTONG; CHANATE WANNA; SIRIPHAN BOONSILP; SUPATRA CHUNCHOB
Biodiversitas Journal of Biological Diversity Vol. 23 No. 7 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d230711

Abstract

Abstract. Boonman N, Chutrtong J, Wanna C, Boonsilp S, Chunchob S. 2022. Detection of Staphylococcus aureus from contact surfaces of public buses in Bangkok and metropolitan area, Thailand. Biodiversitas 23: 3395-3400. The purpose of present investigation was to determine the prevalence of different species of genus Staphylococcus on the contact surfaces of public buses in Bangkok and metropolitan area. A total of 180 samples were collected from handrails, seats, and window frames of each bus of 2 bus terminals, Bangkhen and Morchit, divided into 15 non-air-conditioned buses and 15 air-conditioned buses from each terminal. The samples were cultivated and identified by Gram’s stain and biochemical tests. The results showed that 76.7% from Bangkhen and 80% from Mochit were contaminated with Staphylococcus spp. Based on the type of vehicles, Staphylococcus spp. was found in 93.3% of air-conditioned buses and 63.3% of non-air-conditioned buses. Considering the sampling location, Staphylococcus spp. was found in 28.3% of handrails, 50% of seats and 51.7% of window frames. Four isolates of Staphylococcus aureus were discovered among 294 isolates in a total of Staphylococcus spp., including 3 isolates from Bangkhen and 1 isolate from Mochit. Only one isolate was contaminated on the non-air-conditioned bus, whereas 3 isolates were on the air-conditioned buses. Two isolates of them were found from seats and 2 isolates from window frames. Disk diffusion susceptibility test showed that 3 isolates of S. aureus resisted fusidic acid and fosfomycin. The results suggested that Staphylococcus spp. and S. aureus were prevalence in public transport systems which were a source of infection to the persons. Therefore, effectively controlling their distribution is necessary to reduce the risk of bacterial infections in public bus users.
Antimicrobial activities of endophytic bacteria isolated from Ageratum conyzoides Linn. NARUMON BOONMAN; JARUWAN CHUTRTONG; CHANATE WANNA; SIRIPHAN BOONSILP; SUPATRA CHUNCHOB
Biodiversitas Journal of Biological Diversity Vol. 24 No. 4 (2023)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d240405

Abstract

Abstract. Boonman N, Chutrtong J, Wanna C, Boonsilp S, Chunchob S. 2023. Antimicrobial activities of endophytic bacteria isolated from Ageratum conyzoides Linn. Biodiversitas 24: 1971-1979. Endophytic bacteria were isolated from various parts of Ageratum conyzoides Linn. Total 35 isolates were obtained which were consisting of eight isolates from the roots (AconR1-AconR8), nine isolates from the stems (AconS1-AconS9), seven isolates from the leaves (AconL1-AconL7) and 11 isolates from the flowers (AconF1-AconF11). These endophytic bacteria were examined for their antimicrobial activities against human pathogenic bacteria and fungi. The AconR2 and AconR4 inhibited the growth of Shigella flexneri and Salmonella enterica ser. typhi, whereas Escherichia coli was only inhibited by AconR2. For the antifungal activities assay, all isolated endophytic bacteria revealed no effect on Candida albicans, while six endophytic isolates exhibited more than 80% mycelial growth inhibition against Microsporum canis. These highly effective isolates were identified by matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS). The Bruker scores revealed that AconR2 and AconR4 were identified as Pseudomonas aeruginosa, AconS1 and AconS6 were classified as Enterobacter asburiae, Acon L5 and Acon F9 were identified as Bacillus cereus. The results indicated that these endophytic bacteria isolated from A. conyzoides effectively inhibited the growth of human pathogenic filamentous fungi and showed promise for further development as novel antifungal agents.