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Biomedical subjects

J E Bunn

Publications and source records attributed to J E Bunn.

7 recordsLinked to original sources

Piloting post-exposure prophylaxis in Kenya raises specific concerns for the management of childhood rape.

Thika District, Kenya, is the site of an operational research study on the provision of comprehensive post-rape care, including the free provision of HIV post-exposure prophylaxis (PEP). It is a typical rural Kenyan district in terms of resources and patient throughput. The high rate of children attending for post-rape services was unexpected and had significant programming implications. An age-disaggregated analysis of existing quantitative data from the first 8 months of service provision was conducted. Ninety-four case records were reviewed, of whom 48 (51%) were in the age range 1.5-17 years inclusive. All three cases of male rape were in children. Children were more likely to know their assailant than adults and were more likely to be HIV-negative at baseline. The majority (86%) of children presented in time for PEP, with adherence and completion rates similar to adults but lower rates of 6-week follow-up. The use of weight bands to determine drug dosages greatly simplified the appropriate and early administration of paediatric PEP. The high rates of childhood rape and demand for post-rape services were an enormous challenge for service providers and policy-makers.

Adolescent↗

Hepatitis B prevalence and risk factors for HBsAg carriage amongst Somali households in Liverpool.

The prevalence of hepatitis B core antibody (anti-HBc) and surface antigen (HBsAg) in the Somali population in Liverpool is described and groups who may benefit from vaccination are identified. A cross-sectional descriptive study was undertaken. A total of 439 subjects, aged between 10 months and 80 years, from 151 households, were screened for anti-HBc and HBsAg. One hundred ninety-four (44.2%) were children aged less than 15 years. Three hundred and nine (69%) of enrolled subjects were born in Somalia, 122 (27.2%) were born in the UK and 8 were born elsewhere. Of the study population, 5.7% were carriers of HBsAg, with the highest prevalence in adults aged 20 to 44 years (9.4%). A history of circumcision (RR 95% CI; 1.2, 1.1-1.5) was the most significant risk factor for HBsAg carriage, but was not significant on multivariate analysis. Prevalence of anti-HBc was 27.5%, and increased with age over the first four decades. Univariate analysis showed that a history of living in a refugee camp (RR 95% CI; 3.1, 1.7-5.7), receiving an injection in Somalia (2.1, 1.7-2.5), a history of circumcision or other surgical procedure in Somalia (1.4, 1.3-1.6) and being born in Somalia (1.3, 1.2-1.4) were significant risk factors for anti-HBc positivity. On multivariate analysis, only circumcision (OR 95% CI; 4.3, 1.8-10.3) and receiving an injection in Somalia (2.5, 1.5-4.4) remained significant. Seven of 80 (8.7%) children born in the UK and aged five years or less had evidence of exposure to hepatitis B, of whom only one had a close family member identified to be HBsAg seropositive. Previous infection with hepatitis B is common in this population. Horizontal transmission may be continuing at an early age within the UK, suggesting a population of at risk individuals who would benefit from surveillance and immunisation. Community circumcision is a risk factor for hepatitis B transmission and best practice should be followed when this procedure is undertaken.

Adolescent↗

Human milk IgA concentrations during the first year of lactation.

AIMS: To measure the concentrations of total IgA in the milk secreted by both breasts, throughout the first year of lactation, in a cohort of Gambian mothers of infants at high risk of infection. SUBJECTS AND METHODS: Sixty five women and their infants were studied monthly from the 4th to 52nd postpartum week. Samples of milk were obtained from each breast by manual expression immediately before the infant was suckled. Milk intakes were measured by test weighing the infants before and after feeds over 12 hour periods; IgA concentrations were determined by enzyme linked immunosorbent assay. RESULTS: A total of 1590 milk samples was measured. The median (interquartile range) concentration of IgA for all samples was 0.708 (0.422-1.105) g/l; that in milk obtained from the left breast was 0.785 (0.458-1.247) g/l, and that in milk obtained from the right breast was 0.645 (0.388-1.011) g/l (p < 0.0001). There was no significant change in milk or IgA intakes with advancing infant age, but there was a close concordance of IgA concentrations between the two breasts, with "tracking" of the output of the left and right breasts. There was a significant (p < 0.01) negative correlation between maternal age and parity, and weight of milk ingested by infants. During the dry season (December to May) the median (interquartile range) IgA concentration was significantly higher at 0.853 (0.571-1.254) g/l than during the rainy season (June to November), when it was 0.518 (0.311-0.909) g/l (p < 0.0001). CONCLUSIONS: Sustained IgA secretion is likely to protect suckling infants from microbial infection.

Aging↗

Expanding global distribution of rotavirus serotype G9: detection in Libya, Kenya, and Cuba.

Serotype G9 may be the fifth most common human rotavirus serotype, after serotypes G1 to G4. In three cross-sectional studies of childhood diarrhea, we have detected serotype G9 rotaviruses for the first time in Libya, Kenya, and Cuba. Serotype G9 constituted 27% of all rotaviruses identified, emphasizing the reemergence of serotype G9 and suggesting that future human rotavirus vaccines will need to protect against disease caused by this serotype.

Child↗