B cells in human food allergy have been studied predominantly in the blood. Little is known about IgE B cells or plasma cells in tissues exposed to dietary antigens. We characterized IgE clones in blood, stomach, duodenum, and esophagus of 19 peanut-allergic patients, using high-throughput DNA sequencing. IgE cells in allergic patients are enriched in stomach and duodenum, and have a plasma cell phenotype. Clonally related IgE and non-IgE-expressing cell frequencies in tissues suggest local isotype switching, including transitions between IgA and IgE isotypes. Highly similar antibody sequences specific for peanut allergen Ara h 2 are shared between patients, indicating that common immunoglobulin genetic rearrangements may contribute to pathogenesis. These data define the gastrointestinal tract as a reservoir of IgE B lineage cells in food allergy.

Advances in childhood and adolescent cancer treatment have been associated with increased rates of cure during the past 3 decades; however, improvement in adult life expectancy for these individuals has not yet been reported.

Organ transplant has, arguably, been the pinnacle of the advancement in medical science so far and vascularized composite allotransplantation has been the most recent addition to it. The scope of vascularized tissue allotransplantation has been widening with each passing day and more and more reports regarding the safety and efficacy of the procedure have been described. Due to the limited available literature on the management of the complications and implications of the hand transplant, the importance of each report on the procedure is paramount. A mid-arm allotransplant is a challenge in terms of expected motor recovery, and many controversies exist over the efficacy of the procedure altogether. Moreover, our case was complicated by a long ischemia time due to logistic reasons. We share our experience of a transhumeral upper limb allotransplantation, the complications associated with it along with the early postoperative results at 10 months follow up.

In the generalised epidemics of sub-Saharan Africa (SSA), human immunodeficiency virus (HIV) prevalence shows patterns of clustered micro-epidemics. We mapped and characterised these high-prevalence areas for young adults (15-29 years of age), as a proxy for areas with high levels of transmission, for 7 countries in Eastern and Southern Africa: Kenya, Malawi, Mozambique, Tanzania, Uganda, Zambia, and Zimbabwe.

Baltimore and San Francisco represent high burden areas for gonorrhea in the United States. We explored different gonorrhea screening strategies and their comparative impact in the 2 cities.