Louse comb versus direct visual examination for the diagnosis of head louse infestations

Kosta Y. Mumcuoglu, Michael Friger, Inna Ioffe-Uspensky, Fiameta Ben-Ishai, Jacqueline Miller

Research output: Contribution to journalArticlepeer-review

87 Scopus citations

Abstract

The techniques used for diagnosis of head louse (Pediculosis capitis) infestation are a source of controversy. Most epidemiologic and diagnostic studies have been done using direct visual examination. The main objective of this study is to compare the efficacy of direct visual examination versus the louse comb method. The hair of each child was examined twice; one team used a screening stick and another team used a louse comb. Seventy-nine boys and 201 girls, 7-10 years old were examined. Examination with a louse comb found that 25.4% of the children were infested with both lice and nits, while another 31.3% had nits only. Boys were significantly less infested with lice and nits than girls (lice: 15.2 and 29.6%; nits: 21.5 and 35.4%, respectively). The infestation rate with lice and nits was significantly higher in children with long (68.9%) and medium-length (63.9%) hair than in children with short hair (44.0%) (p < 0.01). Direct visual examination found that 5.7% of the children were infested with both lice and nits, and another 49.0% with nits only. The average time until detection of the first louse was 57.0 seconds with the comb as compared to 116.4 seconds by direct visual examination. Diagnosis of louse infestation using a louse comb is four times more efficient than direct visual examination and twice as fast. The direct visual examination technique underestimates active infestation and detects past, non-active infestations.

Original languageEnglish
Pages (from-to)9-12
Number of pages4
JournalPediatric Dermatology
Volume18
Issue number1
DOIs
StatePublished - 28 Feb 2001

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Dermatology

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