Personal and indoor exposure to PM2.5 and polycyclic aromatic hydrocarbons in the southern highlands of Tanzania: a pilot-scale study.

Personal and indoor exposure to PM(2.5) and polycyclic aromatic hydrocarbons (PAHs) were measured in households in the Njombe district of Tanzania. Cooking is conducted indoors in this region due to its high elevation, cool climate, and heavy seasonal rainfall. Kitchens are often poorly ventilated, resulting in high exposures to combustion-related pollutants. Sampling sites were selected to represent typical cooking practices across regional socio-economic divisions. These include the use of open wood fires, charcoal, a mix of charcoal and kerosene, and liquid petroleum gas (LPG) for cooking fuels. PM(2.5) average personal exposure was 14 µg/m(3) (±3, n = 3) for LPG, 88 µg/m(3) (±42, n = 3) for kerosene/charcoal mix, 588 µg/m(3) (±347, n = 3) for charcoal alone, and 1574 µg/m(3) (±287, n = 3) for open wood fires. Total PAH average personal exposures were less than 1 ng/m(3) (±1, n = 3) for LPG, 57 ng/m(3) (±16, n = 3) for kerosene/charcoal mix, 334 ng/m(3) (±57, n = 3) for charcoal alone, and 5040 ng/m(3) (±909, n = 3) for open wood fires. Benzo[a]pyrene equivalent exposures for US EPA's priority PAH pollutants were 0 for LPG, 8 ng/m(3) for kerosene/charcoal mix, 44 ng/m(3) for charcoal, and 767 ng/m(3) for open wood fire. Inhalable pollutants are present at unacceptably high levels, exceeding indoor air quality standards for all but LPG fuels. Relative results provide an exposure profile for rural East Africa and support the feasibility of conducting a larger scale smoke exposure campaign in the region. The use of "fuel efficient" wood stoves for the reduction of PM(2.5) and PAH exposure was measured in a local secondary school. Proper use of "fuel efficient" wood stoves reduced personal and indoor exposure to measured pollutants by more than 90%, supporting further investigation into the applicability of this technology to significantly improve indoor air quality.

Paraffin-related injury in low-income South African communities: knowledge, practice and perceived risk.

OBJECTIVE: To explore what individuals at risk of injury from using paraffin (also known as kerosene) know about paraffin safety, what they do to protect themselves and their families from paraffin-related injury, and how they perceive their risk for such injury. Also, to explore interrelations between these factors and age, sex, education and income. METHODS: A sample of 238 individuals was randomly recruited from low-income housing districts near Cape Town, South Africa in 2007. Trained research assistants interviewed participants to explore their knowledge about paraffin-related safety and their perceived risk of injury from using paraffin. Researchers inspected participants' homes to evaluate paraffin safety practices. Descriptive and correlational analyses were conducted. FINDINGS: Participants had relatively low levels of knowledge about paraffin-related safety. They had high levels of unsafe practice and their perceived risk of injury was moderate. Knowledge of paraffin safety and safe practices were positively correlated with each other. Greater knowledge showed a negative correlation with the perception of being at risk for injury, but safe practices showed no correlation with perceived risk of injury. Formal education, the number of children in the home and frequency of paraffin use were positively correlated with knowledge but not with safe practices. The only significant correlate to safe practices was greater income, perhaps a reflection of the impact of financial resources on paraffin safety practices. CONCLUSION: To develop successful paraffin safety interventions, it is necessary to understand baseline levels of knowledge, practice and perceived risk of injury among at-risk populations. Our findings could be of value for designing interventions that will increase knowledge, improve safe practices and lead to the accurate perception of the risk of injury from using paraffin.

Severe burn trauma from deliberate self-harm: the Sokoto experience.

BACKGROUND: Burn injury is one of the most severe forms of trauma that can afflict mankind. Although several forms of suicide and para suicide have been reported worldwide, severe burn injuries from deliberate self-harm have been poorly documented in Africa. AIM: To evaluate the pattern of deliberate self-harm by burning in our environment. METHOD: This is a 5-year retrospective analysis of all patients who sustained burns from deliberate self-harm (DSH) seen at the Usmanu Danfodiyo University Teaching Hospital, Sokoto from June 1998 to May 2003. The patients' data and other necessary information were extracted from the case notes. RESULTS: Seven patients were seen over the study period. There were six females and one male, giving a female to male ratio of 6:1. All the injuries occurred at home from kerosene flame burns. In all cases, the intent was to take the patient's own life. The triggering factors were mainly psychosocio-economic. Six patients had up to secondary education while one patient had a degree certificate. None of the patients was gainfully employed at the time of incidence. Two patients had previously attempted suicide. Only one patient had a history of psychiatric illness. All sustained severe flame burns ranging from 45% - 98% body surface area (BSA). Compliance to treatment was generally poor. All patients were managed at the intensive care unit (ICU) of the hospital.. Five patients died, while the remaining two signed against medical advice (SAMA) during the course of management. The duration of hospital stay ranged from 2 - 10 days. CONCLUSION: Severe burn injury from DSH, although previously poorly documented in Africa, is not uncommon in our environment. The morbidity and mortality are high, not only because of the nature of injury, but probably because of poor compliance to treatment. We advocate community based studies and routine screening of adolescents to identify those at risk. The need for the establishment suicide information, intervention and prevention centre in Nigeria cannot be overemphasised.

Kerosene stove as a cause of burns admitted to the Ain Shams burn unit.

Kerosene stoves are in widespread use for cooking and warming water in underprivileged areas in Cairo. These stoves are dangerous and lack safety measures; they are often a cause of fire incidents and burn injuries. During the period from May 1995 to December 1996 the number of patients who presented to the burn unit of Ain Shams University, Cairo, Egypt was 759, of whom 304 (40%) sustained the injury as a consequence of kerosene stove fires. Efforts to inform the public about the danger of these stoves are recommended to minimize the incidence, morbidity, mortality and cost of this relatively common and preventable type of injury.