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Phenothrin lotion, the latest recruit in the battle against headlice: the results of two controlled comparative studies.

Abstract
One hundred and one subjects with head louse infestation were entered into two separate studies, in which a phenothrin aqueous/alcoholic lotion was compared to a carbaryl lotion and a malathion lotion. Fifty subjects were treated with a single application of the phenothrin lotion, 28 with the carbaryl lotion and 23 with the malathion lotion. In the comparative study of the phenothrin and malathion lotions an inspection on the day following treatment showed no live lice remained, but that six of the subjects treated with malathion lotion still had evidence of viable eggs (p less than 0.05). In one subject viable eggs were still evident at two weeks post-treatment. There were no cases, however, of live lice or viable eggs at four weeks post-treatment. Mild cutaneous side-effects were reported in five subjects, the incidence of which was not significantly different by treatment group. One subject in the phenothrin and carbaryl lotion comparative study had evidence of live lice at one week post-treatment with phenothrin lotion. This subject received no further treatment and was clear of both live lice and viable eggs at subsequent visits. A separate case of live lice infestation was found at two weeks post-treatment in a subject treated with phenothrin lotion and at four weeks post-treatment in two subjects treated with carbaryl lotion. As these subjects were free of live lice infestation at previous follow-up visits it was highly probable that these were cases of re-infestation from another source.(ABSTRACT TRUNCATED AT 250 WORDS)
AuthorsS Doss, C A Powell, A J Miller
JournalJournal of the Royal Society of Health (J R Soc Health) Vol. 111 Issue 2 Pg. 47-50 (Apr 1991) ISSN: 0264-0325 [Print] England
PMID1903813 (Publication Type: Clinical Trial, Comparative Study, Journal Article, Randomized Controlled Trial)
Chemical References
  • Insecticides
  • Pyrethrins
  • phenothrin
  • Carbaryl
  • Malathion
Topics
  • Adolescent
  • Adult
  • Animals
  • Carbaryl (adverse effects, therapeutic use)
  • Child
  • Child, Preschool
  • Female
  • Humans
  • Insecticides (adverse effects, therapeutic use)
  • Lice Infestations (drug therapy)
  • Malathion (adverse effects, therapeutic use)
  • Male
  • Phthiraptera (drug effects)
  • Pyrethrins (adverse effects, therapeutic use)
  • Scalp

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