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Access type: UnknownAuthor: search.filters.author.Sinthusiri, J.

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    Head lice prevalence in suburban Bangkok, Thailand, after the COVID-19 pandemic and herbal shampoo treatment
    (2026-01-01)
    Sinthusiri, J.
    ;
    Sittichok, S.
    ;
    Passara, H.
    ;
    Soonwera, M.
    The prevalence of pediculosis among 3,461 girls from 10 government kindergartens and primary schools in Ladkrabang district was 48.1% in the 1<sup>st</sup> semester (May-September 2022) and 44.6% in the 2<sup>nd</sup> semester (November 2022-March 2023), higher among primary school girls, at 51.8-55.4%, than in kindergarteners, at 30.2-33.1%. Over 80% of the infested girls came from a low-income family (<3,000 USD per year). The Zingiberaceae essential oil and shampoo treatments were highly effective with 100% cure rate for every infested girl after the 2<sup>nd</sup> treatment (on Day 10, after the 1<sup>st</sup> treatment on Day 1). Effective strategies for reducing head lice prevalence are improved living standards and head lice eradication by treatments with effective natural pediculicides and improved head lice educational program.
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    Plant essential oils, trans-anethole and eugenol, for housefly knockdown and mortality
    (2025-03-01)
    Sittichok, S.
    ;
    Passara, H.
    ;
    Sinthusiri, J.
    ;
    Soonwera, M.
    ;
    Thongsaiklaing, T.
    The knockdown and mortality of some compounds from natural oils (trans-anethole, eugenol and a combination of trans-anethole and eugenol) against adult houseflies (Musca domestica) compared with cypermethrin was investigated. The knockdown and mortalities were highest at 100% of 1% trans-anethole with KT50= 31 min and LT50 = 31 min. The mortality index of trans-anethole was 82.1 times that of cypermethrin. In contrast, 1% eugenol had knockdown and mortality was 36% and 0.5% trans-anethole + 0.5% eugenol had knockdown and mortality of 68%, with mortality indexes of 1.6 and 3.2 times versus cypermethrin. The trans-anethole high toxicity and low residue made it a superior control for houseflies.
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    Larvicidal and pupicidal activity of combination of two plant essential oils against Aedes aegypti
    (2025-01-01)
    Sinthusiri, J.
    ;
    Puwanard, C.
    ;
    Passara, H.
    ;
    Soonwera, M.
    The larvicidal and pupicidal effects of six mixtures of cinnamon (Cinnamomum verum J. Presl.) and nutmeg (Myristica fragrans Houtt.) essential oils (EOs) and major compositions (geranial, α-pinene and trans- cinnamaldehyde) were tested against early fourth instar and pupal stages of Aedes aegypti. The combinations (2% cinnamon EO + 1% geranial, 2% cinnamon EO + 1% trans-cinnamaldehyde and 2% cinnamon EO + 1% α-pinene) showed high toxicity against early 4<sup>th</sup> instar larvae, with 100% mortalities at 24 hours and LT50 between 1.4 and 2.4 hours. Additionally, 2% nutmeg EO + 1% α-pinene showed >99% mortality at 24 hours with LT50 = 4.6 hours. 2% nutmeg EO + 1% geranial and 2% nutmeg EO + 1% α-pinene were highly toxic against pupae, with 100% mortality at 48 hours and LT50 values of 5.8 and 7.8 hours. On the other hand, temephos showed LT50 for larval and pupal stages at 9.8 and 94.1 hours. It showed that 2% nutmeg EO + 1% α-pinene was able to control immature stages and was more effective than temephos. However nutmeg extracts need to be checked for human and valuable species toxicity.
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    Adulticidal activity of star anise, turmeric, cloves and combinations against houseflies
    (2025-01-01)
    Sinthusiri, J.
    ;
    Soonwera, M.
    ;
    Puwanard, C.
    ;
    Passara, H.
    ;
    Thongsaiklaing, T.
    The small droplet size could increase the absorbed ingredients and high stability. The star anise nanoemulsion was determined optimum efficacy, with a 1% concentration resulting in the highest knockdown and mortality rate of 100%. Its KT<inf>50</inf> and mortality effective values were 28 min and 36 times, respectively. Furthermore, the adult stage of houseflies is found to be susceptible to star anise nanoemulsion. In contrast, cypermethrin was less toxic to it, with a high KT<inf>50</inf> and resistance to adult houseflies. Consequently, the star anise nanoemulsion could be developed into an efficient and safe environment for controlling housefly populations.
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