1. Bacillus sp. SAB E-41-derived extract shows antiaging properties via ctt1-mediated oxidative stress tolerance response in yeast Schizosaccharomyces pombe
Muhammad Eka PRASTYA ; Rika I. ASTUTI ; Aris T. WAHYUDI ; Irmanida BATUBARA ; Irmanida BATUBARA
Asian Pacific Journal of Tropical Biomedicine 2018;8(11):533-539
Objective: To analyze potential activation of oxidative stress tolerance systems by SAB E-41 bacterial extract in promoting the life span of yeast Schizosaccharomyces pombe. Methods: In vitro analysis was done to assess antioxidant activity of SAB E-41 bacterial extract. Antiaging property of the particular extract was then assayed through spot test and chronological life span assays. Furthermore, sty1 mitogen-activated protein kinase, pap1 transcriptional factor of oxidative stress response and its downstream genes, ctt1 were evaluated via real time PCR. The protein level of ctt1 was then observed via Western Blot analysis. In addition, accumulation of reactive oxygen species and mitochondrial activity were conducted to understand the effect of SAB E-41 upon oxidative stress response systems in vivo. Results: The IC
2.Prolonged dengue outbreak at a high-rise apartment in Petaling Jaya, Selangor, Malaysia: A case study
Tee, G.H. ; Yoep, N. ; Jai, A.N ; Abdul Mutalip, M.H ; Paiwai, F. ; Hasim@Hashim, M.H. ; Pan, S. ; Lodz, N.A ; Aris, T.
Tropical Biomedicine 2019;36(2):550-558
There was an increasing trend in dengue infection in Malaysia with many outbreaks
that occurred in Petaling District, Selangor in 2013 – 2014. A high rise apartment in Petaling
Jaya reported ten episodes of dengue outbreaks from June 2013 to June 2014. We studied the
prolonged dengue hotspot at this residential complex in Petaling Jaya, Selangor and made
recommendations to prevent future prolonged dengue outbreaks. This was a retrospective
exploratory study by analysing secondary data on dengue outbreaks from years 2013 to 2014.
Small group discussions, interview sessions with staff and site visits were carried out to
obtain necessary information. Two hundred and ninety-one cases were notified during the
dengue outbreaks from Epid week (EW) 25 in 2013 to EW 26 in 2014 with no mortality
reported. Information entered into dengue databases might be incomplete or mixed up.
Active case detection and environmental risks assessment based on cases were not carry out
due to the massive outbreak. Basic information on the population in the outbreak locality was
unavailable. Various control activities were carried out with varying outcomes. Community
participation was poor with little cooperation from residents during health education and
community-based mosquito breeding prevention activities. To ensure better management of
dengue outbreaks and to prevent prolonged dengue outbreaks in the future, integrated case
findings, effective control activities, extensive environmental assessment on the outbreak
locality and adopting innovative community outreach initiative with sufficient staff are
required to curb dengue vector.