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High in vitro efficacy of Nyda L, a pediculicide containing dimeticone.
J Eur Acad Dermatol Venereol. 2007 Nov; 21(10):1325-9.JE

Abstract

BACKGROUND

The therapy of pediculosis remains a common problem in clinical practice. As resistance to commonly used chemical pediculicides is constantly increasing, there is a need for new effective compounds.

STUDY DESIGN

The efficacy of Nyda L, a new pediculicide containing a high concentration of dimeticone, was assessed in an in vitro trial and compared with three reference products (Hedrin containing 4% dimeticone, Lyclear containing 1% permethrin, and Prioderm containing 1% malathion) and a negative control group. Head lice were collected from heavily infested patients in a resource-poor community in Northeast Brazil, where no resistance against pediculicides has been reported thus far. In each of the five groups, 50 adult fully vital lice were tested. We used a dip test (immersing head lice in the undiluted products for 3 min, washing off products after 20 min). Using predefined criteria for mortality, the lice were monitored at different points in time, for a period of 24 h.

RESULTS

Nyda L and Prioderm killed all head lice already after 5 min. The efficacy of Nyda L was better than of Lyclear. Lice treated with Hedrin resurrected after several hours and did not show a significantly higher mortality compared with the control group after 24 h.

CONCLUSION

Nyda L can be regarded as a very efficacious pediculicidal compound, killing all lice in vitro within 5 min.

Authors+Show Affiliations

Department of Community Health, School of Medicine, Federal University of Ceará, Fortaleza, Brazil.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17958836

Citation

Oliveira, F A S., et al. "High in Vitro Efficacy of Nyda L, a Pediculicide Containing Dimeticone." Journal of the European Academy of Dermatology and Venereology : JEADV, vol. 21, no. 10, 2007, pp. 1325-9.
Oliveira FA, Speare R, Heukelbach J. High in vitro efficacy of Nyda L, a pediculicide containing dimeticone. J Eur Acad Dermatol Venereol. 2007;21(10):1325-9.
Oliveira, F. A., Speare, R., & Heukelbach, J. (2007). High in vitro efficacy of Nyda L, a pediculicide containing dimeticone. Journal of the European Academy of Dermatology and Venereology : JEADV, 21(10), 1325-9.
Oliveira FA, Speare R, Heukelbach J. High in Vitro Efficacy of Nyda L, a Pediculicide Containing Dimeticone. J Eur Acad Dermatol Venereol. 2007;21(10):1325-9. PubMed PMID: 17958836.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - High in vitro efficacy of Nyda L, a pediculicide containing dimeticone. AU - Oliveira,F A S, AU - Speare,R, AU - Heukelbach,J, PY - 2007/10/26/pubmed PY - 2008/3/18/medline PY - 2007/10/26/entrez SP - 1325 EP - 9 JF - Journal of the European Academy of Dermatology and Venereology : JEADV JO - J Eur Acad Dermatol Venereol VL - 21 IS - 10 N2 - BACKGROUND: The therapy of pediculosis remains a common problem in clinical practice. As resistance to commonly used chemical pediculicides is constantly increasing, there is a need for new effective compounds. STUDY DESIGN: The efficacy of Nyda L, a new pediculicide containing a high concentration of dimeticone, was assessed in an in vitro trial and compared with three reference products (Hedrin containing 4% dimeticone, Lyclear containing 1% permethrin, and Prioderm containing 1% malathion) and a negative control group. Head lice were collected from heavily infested patients in a resource-poor community in Northeast Brazil, where no resistance against pediculicides has been reported thus far. In each of the five groups, 50 adult fully vital lice were tested. We used a dip test (immersing head lice in the undiluted products for 3 min, washing off products after 20 min). Using predefined criteria for mortality, the lice were monitored at different points in time, for a period of 24 h. RESULTS: Nyda L and Prioderm killed all head lice already after 5 min. The efficacy of Nyda L was better than of Lyclear. Lice treated with Hedrin resurrected after several hours and did not show a significantly higher mortality compared with the control group after 24 h. CONCLUSION: Nyda L can be regarded as a very efficacious pediculicidal compound, killing all lice in vitro within 5 min. SN - 0926-9959 UR - https://www.unboundmedicine.com/medline/citation/17958836/High_in_vitro_efficacy_of_Nyda_L_a_pediculicide_containing_dimeticone_ DB - PRIME DP - Unbound Medicine ER -