Impact of intraspecific variation on measurements of thermal tolerance in bumble bees.

Climate change is an important driver of bee decline despite the fact that many species might respond to climate change differently. One method to predict how a species will respond to climate change is to identify its thermal tolerance limits. However, differences in thermal tolerance might also occur among distant populations of the same species based on their local environment or even among castes of social insects.

Altering the Sex Pheromone Cyclo(l-Pro-l-Pro) of the Diatom towards a Chemical Probe.

As a major group of algae, diatoms are responsible for a substantial part of the primary production on the planet. Pennate diatoms have a predominantly benthic lifestyle and are the most species-rich diatom group, with members of the raphid clades being motile and generally having heterothallic sexual reproduction. It was recently shown that the model species uses multiple sexual cues during mating, including cyclo(l-Pro-l-Pro) as an attraction pheromone.

Caregiver's HIV disclosure to children 12 years and under: a review and analysis of the evidence.

A systematic review and analysis of the empirical evidence through June 2010 on HIV disclosure to children 12 and under was conducted using methods validated by the Cochrane group. Fifteen articles focusing on caregiver disclosure (255 total) were analyzed using GradePro 3 software. Results suggest that there is evidence of health and future care planning benefit for HIV+ and healthy children (12 and under) of HIV+ caregivers if the caregiver discloses his/her HIV status to them.

Using a sociological model to analyze access to pediatric HIV/AIDS care in rural sub-Saharan Africa.

The decentralization of pediatric HIV/AIDS-treatment programs to primary health care centers in rural Africa has lagged behind. In order to guide an analysis of current access to care, a sociological conceptual framework was developed. This framework focused on conditions of seeking pediatric HIV care among community members and initiating pediatric HIV care by primary health care workers (PHCWs).

The unique features of pediatric HIV-1 in sub-Saharan Africa.

In order to adapt African programs for antiretroviral treatment (ART) to children's needs, a good understanding of the unique features of pediatric HIV in Africa and realistic expectations of the results of such programs are crucial. We compared pediatric HIV in African settings to pediatric HIV in Western settings and to adult HIV in African settings. As an illustration, we also compared baseline characteristics and ART-outcomes from 15 African pediatric studies, 11 Western pediatric studies and 15 studies of African adults.

Access to occupational postexposure prophylaxis for primary health care workers in rural Africa: a cross-sectional study.

Background: For many primary health care workers in developing countries, the limited availability and cost of public transport hinders timely access to occupational postexposure prophylaxis (PEP) at referral hospitals. Adapted PEP training and a starter's kit (for human immunodeficiency virus, hepatitis B virus, and syphilis prophylaxis) could improve access.

Methods: The evaluation method, based on the 12 steps of the decentralized phase of PEP management, calculated different scores from the responses for 51 anonymous surveys and allowed comparison among different groups.

HIV disclosure and discussions about grief with Shona children: a comparison between health care workers and community members in Eastern Zimbabwe.

Research in HIV-related counseling for African children has concentrated on urban tertiary hospitals, but most children have their first health care encounter at a rural primary health care center. This study investigated perceptions about the acceptability of disclosing the parents' or child's HIV status to a child and talking about grief with children, as well as the preferred time, type and setting for HIV disclosure. An anonymous survey was taken from 64 primary health care workers and 131 community members from rural Eastern Zimbabwe.

Care and treatment of HIV-infected children in Africa: issues and challenges at the district hospital level.

More than 90% of pediatric HIV infection occurs in sub-Saharan Africa and 75% of these children currently die before their fifth birthday. Most HIV-infected children in Africa rely on district hospitals for HIV treatment, but insufficient attention has been paid to improving HIV/AIDS care at this level. Considerable confusion exists about optimal use of combination antiretroviral treatment, prophylaxis for opportunistic infections and other rational healthcare interventions that can greatly improve the quality of life for these children.

Pediatric human immunodeficiency virus screening in an African district hospital.

In order to evaluate alternative tests and strategies to simplify pediatric human immunodeficiency virus (HIV) screening at the district hospital level, a cross-sectional exploratory study was organized in the Democratic Republic of the Congo. Venous and capillary phlebotomies were performed on 941 Congolese children, aged 1 month to 12 years (153 children under 18 months and 788 children more than 18 months old). The HIV prevalence rate was 4.