Introduction. In contact with insects, people present a wide range of reactions, local or systemic, whether caused by insect bites or a venom injections, sucking blood or exposure to insect?s body and its secretions. Simulium erythrocephalum is an aggressive anthropophilic species, and following its bite humans may develop purpuric macules, edema and erythema surrounding the bite site. Our case series indicates frequent occurrence of Simulium erythrocephalum bites in Serbia. Case Series. We present a series of 30 cases reviewed between April and July 2006, who developed a local reaction at the site of this insect?s bite. In all patients, the skin lesions were located on the extremities, mainly the lower legs. The number of bites varied from two to more than ten. In all patients the bites occurred either during outdoor activities on the riverside or their residence was near the Danube. The therapy with antihistamines, local and/or systemic corticosteroids, as well as symptomatic therapy, with compression and limb elevation was recommended. The skin lesions regressed in one week in most patients, but in few they lasted for several weeks. Conclusion. In addition to its impact on human health, Simulium erythrocephalum also has a role in veterinary medicine. Insect bites in animals can cause significant livestock losses, occasionally resulting in animal mortality. Apart from this, Simulium erythrocephalum may also be a vector in the transmission of the parasite from the genus of Leucocytozoon that infests birds.

Acne keloidalis nuchae (AKN) / folliculitis keloidalis nuchae (FKN) is a chronic inflammatory condition which involves hair follicles localized predominantly in occipital scalp and posterior neck area leading to hypertrophic scarring alopecia. We present a 59-year-old factory worker, Caucasian male with a whitish alopecic oval plaque about 10 cm in diameter in the occipital region. The peripheral part of plaque was mildly inflammated, with groups of tufted terminal hairs, while the central part showed cicatricial alopecia and discrete non-adherent dry scales. Skin changes firstly occurred 6 years earlier, as itchy papules and pustules that sometimes healed with scarring. The applied relevant diagnostic and therapeutical measures are discussed in this report.

Inherited epidermolysis bullosa (IEB) is a genodermatosis transmitted in either autosomal dominant or autosomal recessive manner. The disease is characterized by the development of blisters, erosions, scars, nail dystrophy and scalp abnormalities. Our case report has included four members of one family in three generations with manifested disease. Our 25-year-old female patient presented with a few eroded, crusted, nummular lesions localized on the dorsal plate of interphalangeal joints of fingers, elbow and knee skin, while anonychia was found on her digits. Our youngest patient (her 3.5-year-old son) presented with the lesions in the form of blisters filled with serous fluid, erosions, recent scars and atrophy. Some atrophic scars on the elbow and knee skin were found in our patient′s younger brother, aged 16. The 46-year-old mother of our female patient had nail dystrophy on her hands accompanied by the toenails absence. Pediatric geneticist created the pedigree chart which showed autosomal dominant inheritance pattern with complete expressivity and penetrance. Further diagnostics was not done because the family was not interested.

Background: The use of alternative treatment methods, particularly medicinal herbs from the family Compositae, significantly contributes to the increase in the incidence of allergic contact dermatitis among patients with chronic venous insufficiency. Objective: Estimating frequency of contact sensitization among patients with chronic venous insufficiency and determining the most common contact sensitizers from the series of bio-origin allergens from the Compositae family and ubiquitous weeds of Vojvodina. Materials and Methods: The total number of 266 patients with suspected contact dermatitis was divided into two groups: the experimental group consisted of patients with chronic venous insufficiency (EG), and the control group consisted of patients without chronic venous insufficiency (CG). All subjects were tested with allergens of biological origin from the family Compositae, screening allergen SL-mix and original extracts of ubiquitous weed plants of Vojvodina. Results: Patch test revealed a positive reaction to allergens of the Compositae family in 6.69% in the experimental group, and in 4.17% in the control group. The standardized response rate to the SL-mix in the experimental group was 2.07%, while in the control group, it was 1.51%. The presence of a positive reaction to at least one extract of ubiquitous weed plants of Vojvodina was determined in 6.11% in the experimental group, and in 3.23% of patients in the control group. No statistically significant difference in response rates was found between the examined groups. Conclusions: Establishing the diagnosis of Compositae dermatitis can be supplemented by additional testing with weed plant extracts from a specific geographical area, resulting in the detection of novel unknown allergens.