Rx Note

Introduction Infestation by head lice ( Pediculus humanus capitis ) can occur at any time of the year and is mostly transmitted by head-to-head contact . It is most prevalent in children aged 4 to 11 years, especially girls. Clinical Features Many cases of head lice infestation are asymptomatic . Pruritus (intense itchiness) resulting from sensitisation to louse salivary or faecal antigens is the most common symptom (seen in approximately one third of patients). Persistent scratching can cause lesions, and this can give rise to secondary infections or swollen lymph glands or both. Observation of live lice is diagnostic. Head lice are 1-4 mm long, and their colour ranges from nearly colourless (when they hatch) to reddish brown (after feeding). NOTE: It should be remembered that an itching scalp in children is not always due to head lice. Inspection of the scalp should be made to check for signs of dandruff , psoriasis or seborrheic dermatitis . Checking For Infection Wet combing of...