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Repellent effect of microencapsulated essential oil in lotion formulation against mosquito bites.

Abstract Many essential oils have been reported as natural sources of insect repellents; however, due to high volatility, they present low repellent effect. Formulation technique by using microencapsulation enables to control the volatility of essential oil and thereby extends the duration of repellency. In this study, the effectiveness of microencapsulated essential oils of Alpinia galanga, Citrus grandis and C. aurantifolia in the lotion formulations were evaluated against mosquito bites.
PMID
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Authors

Mayor MeshTerms
Keywords
Journal Title journal of vector borne diseases
Publication Year Start




PMID- 28352045
OWN - NLM
STAT- MEDLINE
DA  - 20170329
DCOM- 20170414
LR  - 20170414
IS  - 0972-9062 (Print)
IS  - 0972-9062 (Linking)
VI  - 54
IP  - 1
DP  - 2017 Jan-Mar
TI  - Repellent effect of microencapsulated essential oil in lotion formulation against
      mosquito bites.
PG  - 44-53
AB  - BACKGROUND & OBJECTIVES: Many essential oils have been reported as natural
      sources of insect repellents; however, due to high volatility, they present low
      repellent effect. Formulation technique by using microencapsulation enables to
      control the volatility of essential oil and thereby extends the duration of
      repellency. In this study, the effectiveness of microencapsulated essential oils 
      of Alpinia galanga, Citrus grandis and C. aurantifolia in the lotion formulations
      were evaluated against mosquito bites. METHODS: Essential oils and
      N,N-Diethyl-3-methylbenzamide (DEET) were encapsulated by using interfacial pre- 
      cipitation techniques before incorporation into lotion base to form
      microencapsulated (ME) formulation. The pure essential oil and DEET were also
      prepared into lotion base to produce non-encapsulated (NE) formulation. All the
      prepared formulations were assessed for their repellent activity against Culex
      quinquefasciatus under laboratory condition. Field evaluations also were
      conducted in three different study sites in Peninsular Malaysia. In addi- tion,
      Citriodiol(R) (Mosiquard(R)) and citronella-based repellents (KAPS(R), MozAway(R)
      and BioZ Natural(R)) were also included for comparison. RESULTS: In laboratory
      conditions, the ME formulations of the essential oils showed no significant
      difference with regard to the duration of repellent effect compared to the
      microencapsulated DEET used at the highest con- centration (20%). It exhibited
      >98% repellent effect for duration of 4 h (p = 0.06). In the field conditions,
      these formulations demonstrated comparable repellent effect (100% for a duration 
      of 3 h) to Citriodiol(R) based repellent (Mosiguard(R)) (p = 0.07). In both test 
      conditions, the ME formulations of the essential oils presented longer duration
      of 100% repellent effect (between 1 and 2 h) compared to NE formulations.
      INTERPRETATION & CONCLUSION: The findings of the study demonstrate that the
      application of the microencapsulation technique during the preparation of the
      formulations significantly increases the duration of the repellent effect of the 
      essential oils, suggesting that the ME formulation of essential oils have
      potential to be commercialized as an alternative plant-based repellent in the
      market against the mosquitoes.
FAU - Misni, Norashiqin
AU  - Misni N
AD  - Department of Parasitology, Faculty of Medicine, University Malaya, Kuala Lumpur;
      Department of Medical Microbiology and Parasitology, Faculty of Medicine and
      Health Sciences, University Putra Malaysia, Serdang, Selangor, Malaysia.
FAU - Nor, Zurainee Mohamed
AU  - Nor ZM
AD  - Department of Parasitology, Faculty of Medicine, University Malaya, Kuala Lumpur,
      Malaysia.
FAU - Ahmad, Rohani
AU  - Ahmad R
AD  - Medical Entomology Unit, Institute of Medical Research, Kuala Lumpur, Malaysia.
LA  - eng
PT  - Journal Article
PL  - India
TA  - J Vector Borne Dis
JT  - Journal of vector borne diseases
JID - 101212761
RN  - 0 (Capsules)
RN  - 0 (Insect Repellents)
RN  - 0 (Oils, Volatile)
SB  - IM
MH  - Alpinia/chemistry
MH  - Animals
MH  - Capsules/*administration & dosage
MH  - Citrus/chemistry
MH  - Culex/*drug effects
MH  - Female
MH  - Healthy Volunteers
MH  - Humans
MH  - Insect Bites and Stings/*prevention & control
MH  - Insect Repellents/*administration & dosage/isolation & purification/pharmacology
MH  - Malaysia
MH  - Oils, Volatile/*administration & dosage/isolation & purification/pharmacology
EDAT- 2017/03/30 06:00
MHDA- 2017/04/15 06:00
CRDT- 2017/03/30 06:00
AID - JVectorBorneDis_2017_54_1_44_203183 [pii]
PST - ppublish
SO  - J Vector Borne Dis. 2017 Jan-Mar;54(1):44-53.

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