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People living in poor conditions are at high risk of developing different medical diseases of which dermatological diseases are very common. We present 4 clinical cases of skin diseases, which are the most prevalent amongst the majority of socially and economically vulnerable patients. Early diagnosis and appropriate treatment are of paramount importance, in order to avoid their spread in close- knit communities where these patients often live.

Bedbugs are hematophagic arthropods spread in the entire world and in all socio cultural environment. An augmentation of isolated or grouped cases (hotels, hostels, retirement homes) is observed in Geneva since 2012. Clinical manifestations can be various, however a psychological impact exists. To get rid of bedbugs, eradication of the insect from the contaminated room, can be made by different chemical or mechanical ways. These different ways are discussed in this article.

We report three cases of pruritic dermatitis with erythematous maculopapules, having a similar clinical presentation, in summer, and caused by two different arthropods. In wandering diagnosis since sometimes several months, patients have made entomologic investigations in their home. Two of three samples, have shown an infestation by Anobium punctatum, the common furniture beetle, a xylophagous beetle (usually harmless for human). It may be parasited by Pyemotes ventricosus, a mite known since the 19th century to cause this type of hurt. The third sample contained Cimex lectularius or bedbug, haematophagous insect, classically looked for in endemic zone.

Bedbugs have been man's faithful companions from his cave days to the present time. After World War II, improvements in household and personal cleanliness and above all widespread use of insecticidal treatment led to a decline in the prevalence of bedbugs so that they became almost unknown to populations in industrialized countries. However in recent years a resurgence of bedbugs has been reported in North America as well as in most European countries. The purpose of this study is to provide an update on the comeback of bedbugs in France and the world, to discuss their impact on public health, and to consider possible causes for the current resurgence.