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At least 19 recordsLinked to original sources
PubMed2006

Survey of permethrin and malathion resistance in human head lice populations from Denmark.

Head lice, Pediculis capitis De Geer, populations were investigated for permethrin and malathion resistance after initial establishment of a discriminating dose of topical application bioassay with body lice, Pediculus humanus L. For both insecticides, approximately 2 times the lethal dose (LD)95 at 4 h was selected, 2 ng of permethrin and 100 ng of malathion per head louse, respectively. Head lice were collected from heads of infested children in Denmark at 33 primary schools, one kindergarten, and seven boarding schools. The lice were collected by combing of dry hair, with a fine-toothed antilouse comb attached to a vacuum cleaner. A resistance survey covers head lice collected from 208 of 1,441 persons combed. The frequency of permethrin- and malathion-resistant head lice is high in Danish head lice populations. In 17 of 24 samples tested for permethrin resistance, all head lice survived the discriminating dose. Six samples had between 3 and 25% dead head lice, whereas one sample had 60% mortality. In nine of 25 samples tested for malathion resistance, all head lice survived the discriminating dose. Seven samples had <25% dead head lice, and four samples had a mortality of 50% or more at the discriminating dose. The connection between permethrin resistance and kdr-like mutations is confirmed by our findings. The frequency of the double mutation T929I-L932 F in the voltage-sensitive sodium channel gene associated with permethrin resistance was 0.95 in Danish head lice populations.

Adolescent↗
PubMedDate not supplied

[Embolization in the jugulo-tympanic chemodectoma. Value, indications and results].

Jugulo-tympanic chemodectomas are usually treated by means of surgical ablation and radiotherapy, these two techniques being used either in isolation or association. The recent advent of embolization, which has undergone considerable development in the field of vasular neuro-radiology within the last few years, open up new therapeutic possibilities for these vascular tumours. A study of three personal cases, followed up after a substantial lapse of time, gives a good idea of the importance of embolization in the therapeutic armoury. In fact, although embolization used alone can cause a reduction in functional symptomatology and even and objective clinical improvement (disappearance of some lesions of the cranial pairs, for exemple), it is regularly followed by repermeabilization of the various pediculi. Embolization used in isolation should therefore be reserved for patients who are inoperable for reasons for extension or associated deficiencies. Embolization appears to be of value before the operation as it results in less haemorrhage and may also be of value before radiotherapy.

Adult↗
PubMed1988

Bullous eruption in a case of bullous pediculid.

We present a case of a bullous eruption appearing in a patient with pediculosis pubis. The eruption was apparently a reaction to the pediculi, possibly to their salivary secretions. To our knowledge, this is the first report of such a case. We have called this condition "bullous pediculid."

Aged↗