Frequency and significance of immediate contact reactions to peanut in peanut-sensitive children

BACKGROUND

Parents of atopic children frequently report, and are alarmed by, contact reactions to foods. Some schools restrict foods due to concerns regarding possible systemic reactions following contact in allergic children.

OBJECTIVE

We aimed to determine the frequency with which peanut-sensitive children exhibited contact sensitivity to peanut butter and to assess the significance of such reactions.

METHODS

One gram of peanut butter was applied directly to the skin of 281 children who were skin prick test (SPT) positive to peanut (immediate skin application food test; I-SAFT). The test was considered positive if one or more weals were present when the patch was removed after 15 min. A subset of children then underwent an open-label oral challenge with graded amounts of peanut protein.

RESULTS

During 3515 clinic visits, 330 I-SAFT tests for peanut contact sensitivity were performed; 136 (41%) were positive. The mean SPT diameter was 10 mm in the I-SAFT-positive children and 8.5 mm in the I-SAFT-negative children (t-test, P<0.0001). No child had a systemic reaction following topical application of peanut butter. Eighty-four children had 85 oral challenges after blinded, placebo-controlled I-SAFT testing. Challenge was positive in 26/32 of those with a positive I-SAFT and negative in only 6/32. Challenge was also positive in 26/53 but negative in 27/53 of those with a negative I-SAFT (sensitivity 50%, specificity 82%, chi2, P=0.003).

CONCLUSION

A minority of children sensitized to peanut (positive SPT) develop localized urticaria from prolonged skin contact with peanut butter. No tested subjects, including ones with systemic reactions upon oral challenge, developed a systemic reaction to prolonged skin exposure to peanut. Therefore, systemic reactions resulting from this mode of contact with peanut butter appear highly unlikely.

Copying general practitioner referral letters to patients: a study of patients' views

Over the past decade there has been a significant shift towards greater involvement of patients in their health care and this has highlighted many areas relating to doctor-patient communication. One area of communication that has not been extensively researched is the referral letter between general practitioners (GPs) and their patients. This small study of patients' views suggests that patients value receiving a copy of their GP outpatient letter, appreciating greater understanding of, and involvement in, the referral process.

Making research relevant to the primary health care team

There is, as yet, no strong culture of research in primary care and much of the existing research is conceived and undertaken by people outside primary care. The poor implementation of research findings may, in part, be owing to the fact that those delivering the service are not involved in asking or answering questions that are relevant to their practice. This paper reports how three practices constructed a research agenda based on the unanswered questions of their primary care teams. The research questions prioritised by the teams tended towards patient behaviour and service organisation rather than clinical issues. This contrasts with national research priorities. The process has contributed towards the development of a culture of enquiry among team members. Other primary care teams may benefit from a similar approach. National research priority setting in primary care should take more account of the unanswered questions of primary care teams.

FH Tulsa-1 and -2: two unique alleles for familial hypercholesterolemia presenting in an affected two-year-old African-American male

A two-year-old African American boy presented with cutaneous xanthomata and extreme hypercholesterolemia. Subsequent studies revealed that the LDL-cholesterol was 1,001 mg/dl and apoB 507 mg/dl. LDL-receptor activity was almost undetectable, which is compatible with the finding of two newly described defective alleles on exon 4 of the LDL-receptor gene coding for part of the ligand-binding domain. One allele contained a 21 base-pair insertion from codon 200 to 207 whereas the other had a point mutation at codon 207. The rarity of genes for FH reported in individuals of African ancestry is discussed.

Primary health care in practice: a study in Mozambique

This study investigates the delivery of all aspects of Primary Health Care (PHC) in a case study of one urban health centre in Maputo, Mozambique. Within the context of overall social and economic change, Mozambique has given priority to primary health care as the driving force in its newly developed National Health Service. The urban and rural health centres are intended to be the principal vehicles for PHC delivery, and in this study one of Maputo's recently opened health centres was investigated by observing all clinic sessions, interviewing all health centre workers and collecting data from health centre records. It was found that a dichotomy exists between the tasks ascribed to the health centre in the PHC framework, and the feasibility of their execution given existing personnel and material resources. This derives in part from lack of involvement of PHC practitioners in the organisation and planning of PHC, plus resource allocation which remains in favour of secondary and tertiary rather than primary care. Prevention is accorded priority in PHC theory, yet investigation showed that the major demand on the health centre is for curative care. The quality of both curative and preventive care was evaluated and the need for training in specialist diagnostic skills, and a more socially-based understanding of the determinants of health status and risk emerged, respectively for the groups of workers in the two sectors. The level of contact between the curative and preventive sectors was investigated as was the integration of the health centre into the health service as a whole. The problems arising in these areas must be viewed in the context of the very recent development of a National Health Service in a country where, previously, curative care was available only in urban areas and virtually no preventive programmes existed. This study shows that significant steps are being taken to develop a comprehensive PHC programme in Maputo. More important still will be the extension of this level of care provision to the country as a whole.

Preventive health care for mothers and children. A study in Mozambique

This study seeks to evaluate the delivery of preventive mother and child health services in Maputo, Mozambique. Mozambique has given priority to primary health care in the development of its new National Health Service, with a principal focus on maternal and child health (MCH). Three health centres were selected, from areas of contrasting urban ecology. Prenatal and under-fives' clinics were observed at each health centre. It was found that at a technical level the preventive services were operating efficiently, with a coverage of over two-thirds of the target population. However, frequency of attendance at both clinics was much lower in the poorer areas of the city. Additionally, it was observed that women and children identified as having a high risk status were rarely given more care and support. Nurses and midwives, frequently adopted an attitude more punitive than supportive to those most at risk. Notwithstanding these shortcomings, it is clear that significant advances in preventive MCH care are being achieved in a country where 6 years previously the only available health services were curative, and confined to the better-off urban districts.

Antenatal care in Maputo, Mozambique

Mozambique, within its plan for overall social and economic change, has given priority to primary health care with a principal focus on maternal and child health. In 1980 an antenatal control form was introduced into all Maputo's antenatal clinics to monitor pregnancies and to help direct specialist care to mothers at greatest risk--a strategy known by WHO as the "risk approach." In this study three health centres were selected from contrasting areas of the city. Almost 1000 completed antenatal forms were analysed to determine incidence of risk and to evaluate the implementation of this strategy. It was found that: (1) a considerable number of women at risk were identified, referred, and successfully monitored through their pregnancy. (2) Of those women at risk who were identified by the health centres, fewer than half were actually referred for specialist care. (3) Those women at greatest risk were not the highest users of the services, and many of them underused the services compared with those at lower risk. (4) The level of risk and child mortality varied with a measure of urban quality of the areas in which the centres were located.