Active clinical trials for "Exanthema"

Polymorphic light eruption (PLE) is a photodermatosis with an extremely high prevalence, particularly among young women (up to 20%). The disease is characterized through itchy skin lesions on sun-exposed body sites occurring after sun exposure mostly in spring and early summer. Its etiopathogenesis is unknown but resistance to UV-induced immunosuppression with subsequent immune reactions against skin photoneoantigens has been suggested. Regulatory T cells (CD4+CD25+FoxP3+) (Tregs), a subset of T helper cells, are crucial for the induction of immunosuppression. We will test the hypothesis that PLE patients show pathogenic fluctuating Treg levels and function and related parameters over the seasons of the year, possibly being responsible for lack of immune modulation and autoimmunity in PLE. Natural or medical photohardening may normalize Treg deficiency in PLE and lead to clinical adaption in summer. Better insight into the pathogenesis of PLE may give clues to develop new therapeutic strategies.

This study will evaluate blood and tissue samples for a condition called Southern Tick-Associated Rash Illness (STARI). This is a skin rash resembling erythema migrans, the rash found in people infected with Lyme disease. In the south and southeastern United States, STARI is associated with the bite of the lone star tick. Researchers seek a better understanding of the cause of STARI. Through researchers' knowledge, diagnostic tests could be developed. NIH is conducting this study along with the Centers for Disease Control and Prevention (CDC). Patients ages 14 years and older who have recently been diagnosed with possible STARI, who have not taken antibiotics for it longer than 1 day, and whose skin does not form large scars may be eligible for this study. About 20 participants will be enrolled over a 5-year period. Patients will visit the NIH Clinical Center for two or three visits. The first visit may last 2 hours. Photographs will be taken of the rash, and a blood sample of about 1-1/2 tablespoons will be collected for tests. Patients will undergo a punch biopsy of three small pieces of skin, from the rash. The area of the skin will be cleaned, and patients will receive a local anesthetic at the biopsy site. A sharp instrument will remove a round plug of skin, about the size of half a pencil eraser. Patients may feel a pushing sensation, but there should not be pain. The site usually heals without sutures, though the doctors may close it with special adhesive bandages or one or two sutures. Patients will receive instructions about how to take care of the biopsy site. If sutures are used, patients will return in 7 to 10 days to have them removed-or a patient's own doctor may remove the sutures. Patients will return to NIH at 4 to 6 weeks following their first visit. At that time, they will answer questions about how they are doing and donate about 2 tablespoons of blood. Blood and skin samples will be used for research at NIH and CDC. ...

to evaluate the caries prevention potential of pearl powder against CPP-ACP in enamel white spot lesions.

Ectopic eruption may be defined as the eruption of a permanent tooth that takes place in such a manner that a partial or a total resorption of the root(s) of an adjacent primary tooth occurs and can be noted during routine dental radiographic evaluation. It is a common case in mixed dentition and is usually diagnosed by a pediatric dentist. This retrospective study aimed to determine the prevalence and related factors of the ectopic eruption of permanent first molars(PFM). This retrospective study was performed using the panoramic radiographs of 11,924 child patients aged 6-10 years with at least one ectopically erupted PFM were included. The total prevalence of ectopic eruption, type, age, gender, jaw distribution, and bilateral versus unilateral occurrence were determined. The angulation of PFM, mesialization ratio of PFM, and degree of adjacent primary second molar(PSM) tooth root resorption were also assessed. The chi-square test, ANOVA was used for statistical analysis. A total of 76 ectopic eruptions were detected in the maxilla, 6 in the mandible, and 2 in both the maxilla and the mandible. In terms of the eruption status of cases with ectopic eruption, 27 were self-corrected, 51 remained impacted, and 6 were both. The impaction rate of the right upper PFMs was higher than that of others. No significant relationship was found between eruption status and degree of resorption. As a conclusion, small impaction of the PFM does not mean that the PSM lesion is also small. With substantial displacements, a proportionally diminutive lesion can exist, and vice versa.

The investigators intend to find a way to lower drug rash occurrence by applying drug tolerance induction protocol at the beginning of lamotrigine administration. Genotyping of participants with rash and those without rash after taking lamotrigine and genetic testing to find common gene mutations in these participants.

While the acute consequences of an ultratrail are beginning to be well documented, data on the study of recovery in the aftermath of an event are much rarer. In order to overcome these various limitations, the main study of the ERUPTION-3 project is set up on the Grand Raid de La Réunion 2022 races. In the context of exercise responses, the rheological properties of blood can impact the endurance performance. In contrast to short-distance events, the study of blood rheology and red blood cells integrity in long-distance events such as ultra-endurance races is poorly documented in the literature. In the ancillary study, the work that is intended to be carried y out will complement the initial results found by a previous research on 23 runners during the Ultra Trail du Mont Blanc. This ancillary study will also be an opportunity to complete the data from the main study by studying the kinetics of biomarker recovery.

The rationale for this study is to assess the change in ambulatory care visit rates for acute otitis media between the period before (2001-2009) and after the introduction of the 13-valent pneumococcal conjugate vaccine (13vPnC) (2011-2013) among children less than 5 years old in the United States.

The purpose of this study is to determine whether any diagnostic patterns exist in the symptom presentation of Zika Virus.

This investigation seeks to build upon existing evidence that a relationship exists between body mass and timing and the number of erupted teeth.

The main objective is to study the expression of molecules involved in tooth morphogenesis and eruption in healthy patients, and then to compare them with the results in patients with abnormalities of eruption (results obtained via a collection of biological samples of rare diseases already authorized).