Ovicidal and adulticidal activities of Cinnamomum zeylanicum bark essential oil compounds and related compounds against Pediculus humanus capitis (Anoplura: Pediculicidae)

Abstract This study aimed to chemically characterize the essential oils (EOs) of Cinnamomum zeylanicum (cinnamon) and Eremanthus erythropappus (candeia) and evaluate their acaricidal activity, together with that of their major compounds and cinnamyl acetate derivative, against Rhipicephalus microplus. Essential oil compounds were identified through gas chromatography. The larval packet test (LPT) at concentrations ranging from 0.31 to 10.0 mg/mL and the adult immersion test (AIT) at concentrations between 2.5 and 60.0 mg/mL were performed. (E)-cinnamaldehyde and α-bisabolol were the major compounds in cinnamon (86.93%) and candeia (78.41%) EOs, respectively. In the LPT, the EOs of cinnamon and candeia and the compounds (E)-cinnamaldehyde, α-bisabolol and cinnamyl acetate resulted in 100% mortality at concentrations of 2.5, 2.5, 5.0, 10.0 and 10.0 mg/mL respectively. In the AIT, percentage control values > 95% were observed for cinnamon and candeia EOs, (E)-cinnamaldehyde and α-bisabolol at the concentrations of 5.0, 60.0, 20.0, and 20.0 mg/mL, respectively, whereas cinnamyl acetate showed low activity. We conclude that EOs and their compounds showed high acaricidal activity, whereas the acetylated derivative of (E)-cinnamaldehyde presented less acaricidal activity on R. microplus engorged females.

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Activity Test of Durian Peels Essential Oil (Durio zibethinus) as an Antipediculosis Against Pediculus humanus capitis Linn. (Anoplura: Pediculidae)

JPSCR Journal of Pharmaceutical Science and Clinical Research ◽

10.20961/jpscr.v6i3.49900 ◽

2021 ◽

Vol 6 (3) ◽

pp. 318

Author(s):

Yuli Wahyu Tri Mulyani ◽

Siti Nurjanah ◽

Samsuar Samsuar ◽

Laila Susanti

Keyword(s):

Essential Oil ◽

Positive Control ◽

Negative Control ◽

Limb Movement ◽

Time Of Death ◽

Head Lice ◽

Pediculus Humanus Capitis ◽

Pediculus Humanus ◽

Durio Zibethinus ◽

Blood Sucking

Pediculosis is a disease caused by infestation of head lice (Pediculus humanus capitis) which is a blood-sucking obligate ectoparasite. The essential oil of durian fruit peel has active compounds that have the potential as vegetable pediculosides that can kill head lice. This study aimed to find the best concentration of essential oil from durian fruit peels that can kill head lice. The research design used with an essential oil concentration of 100%, 75%, 50%, 25%, distilled water as negative control and permethrin 1% as positive control, three repetitions and each concentration consisting of 10 flea tails. The parameters observed were the condition of lice morphologically based on the activity of limb movement, antenna movement and digestion, then the calculation of mortality was observed based on the time of the test. The results showed that the concentration of durian peel essential oil as an antipediculosis had a significant effect on the time of death of head lice, limb movement and digestion. The test result showed that the concentration is 100%, has a death time of 12 minutes 32 seconds, 75% concentration was 16 minutes 28 seconds, 50% concentration was 21 minutes 11 seconds, 25% concentration was 32 minutes 23 seconds, negative control was 61 minutes 15 seconds. The fastest time of death in positive control for chemical pediculosides was 10 minutes 15 seconds. The conclusion in this study was that essential oils the dominan one is 1,5-naphthyridin-2-amine were proven to kill head lice and the best concentration was close to positive control, namely at a concentration of 100%.

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MOLECULAR STUDY OF HUMAN HEAD LICE, PEDICULUS HUMANUS CAPITIS COMPARISON WITH GOAT SUCKING LICE, LINOGNATHUS STENOPSIS (BURMEISTER) STRAINS

Anbar Journal of Agricultural Sciences ◽

10.32649/ajas/2020/12 ◽

2020 ◽

pp. 132-139

Keyword(s):

Genetic Difference ◽

Human Head ◽

Molecular Study ◽

Head Lice ◽

Pediculus Humanus Capitis ◽

School Students ◽

Pediculus Humanus ◽

Sucking Lice ◽

Pcr Products ◽

Amplicon Size

In this study, only (122) out of (915) primary school students were shown to be infected with head lice Pediculus. humanus capitis. The number and percentage of infected males were 46 (11.3%), while the number and percentage of infected females were 76 (14.9%). The results in our study also showed that the number and percentage of goats infected with goat sucking lice, Linognathus stenopsis was 70 (21.7%) of the total 322 animals, with the highest number and percentage among female goats 44 (62.9%) compared to the male goats 26 (37.1%). The study demonstrated that the rate of genetic difference between the studied samples was 89% and the similarity rate was 11%. Detection of OP-K01 gene pieces by PCR products showed that the amplicon size was 520 bp for P. humanus capitis isolated from humans, while the detection of OP-E20 and OP-M05 gene pieces with PCR product showed the lowest amplicon size 230 bp for Linognathus stenosis isolated from goats.

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Prevalence of Head Lice (Pediculus humanus capitis) infestation among schools workers in the Eastern Region, Saudi Arabia

Saudi Journal of Biological Sciences ◽

10.1016/j.sjbs.2021.06.013 ◽

2021 ◽

Author(s):

Hanadi B. Baghdadi ◽

Eltigani O.M. Omer ◽

Dina M. Metwally ◽

Rewaida Abdel-Gaber

Keyword(s):

Saudi Arabia ◽

Eastern Region ◽

Head Lice ◽

Pediculus Humanus Capitis ◽

Pediculus Humanus

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Anti-biofilm and Virulence Factor-Reducing Activities of Essential Oils and Oil Components as a Possible Option for Bacterial Infection Control

Planta Medica ◽

10.1055/a-1147-4671 ◽

2020 ◽

Vol 86 (08) ◽

pp. 520-537 ◽

Cited By ~ 2

Author(s):

Jürgen Reichling

Keyword(s):

Quorum Sensing ◽

Essential Oil ◽

Essential Oils ◽

Virulence Factor ◽

Model Organisms ◽

Regulation System ◽

Expression Of Genes ◽

Reporter Strains ◽

Violacein Production ◽

Essential Oil Compounds

AbstractPathogenic biofilm-associated bacteria that adhere to biological or nonbiological surfaces are a big challenge to the healthcare and food industries. Antibiotics or disinfectants often fail in an attempt to eliminate biofilms from those surfaces. Based on selected experimental research, this review deals with the potential biofilm-inhibiting, virulence factor-reducing, and biofilm-eradicating activities of essential oils and single essential oil compounds using Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and Chromobacterium violaceum as model organisms. In addition, for the bacteria reviewed in this overview, different essential oils and essential oil compounds were reported to be able to modulate the expression of genes that are involved in the formation of autoinducer molecules, biofilms, and virulence factors. The anti-quorum sensing activity of some essential oils and single essential oil compounds was demonstrated using the gram-negative bacterium C. violaceum. Reporter strains of this bacterium produce the violet-colored compound violacein whose synthesis is regulated by quorum sensing autoinducer molecules called acylhomeserinlactones. Of great interest was the discovery that enantiomeric monoterpenes affected the quorum sensing regulation system in different ways. While the (+)-enantiomers of carvone, limonene, and borneol increased violacein formation, their (−)-analogues inhibited violacein production.For the successful eradication of biofilms and the bacteria living inside them, it is absolutely necessary that the lipophilic volatile substances can penetrate into the aqueous channels of biofilms. As shown in recent work, hydrophilic nano-delivery systems encapsulating essential oils/essential oil compounds with antibacterial effects may contribute to overcome this problem.

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