Search PubMed⌕ Search

Biomedical subjects

A A Jansen

Publications and source records attributed to A A Jansen.

At least 55 records · Page 3Linked to original sources
PubMed1983

Machakos project studies agents affecting health of mother and child in a rural area of Kenya. XXIII bacterial contamination of foods commonly eaten by young children in Machakos, Kenya.

A simplified method, the Agar Immersion Plating and Contact (AIPC) slide technique was applied for the bacteriological examination of children's dishes and drinking water in Machakos District, Kenya. A total of 214 samples, collected from 106 households, were examined for degree of colonization by Enterobacteriaceae (E) and Staph. aureus (ST). Fourty four percent of the dishes and two percent of the water samples were unsafe with respect to Enterobacteriaceae. In 12% of the dishes and none of the water samples Staph. aureus occurred at levels above the threshold of acceptability. Colonization increased with storage time. Implications of these results in relation to diarrhoea morbidity patterns among young children are being investigated elsewhere.

Child, Preschool↗
PubMed1980

Relationships between Ascaris infection and growth of malnourished preschool children in Kenya.

A longitudinal study in Ascaris-infected and noninfected children was conducted in two Kenyan villages. Anthropometric, clinical, and stool exams were performed three times at 14-week intervals. All children received an anthelmintic drug (levamisole) at the second examination. In the 14 weeks before deworming, children with Ascaris (n = 61) did not differ from controls (n = 125) in percentage expected weight gain. In the 14 weeks after deworming, previously infected children showed higher percentage expected weight gain than controls. Before deworming, there was a statistically significant (P less than 0.0005) decrease in triceps skinfold thickness in Ascaris-infected children versus controls. After deworming, skinfold increased significantly (P less than 0.0005) in previously infected children versus controls. Multiple regression analysis showed that Ascaris infection was by far the most important variable of those studied explaining decrease in skinfold thickness before and increase after deworming. It appears that even light Ascaris infections might adversely influence nutritional status, and deworming might enhance growth.

Anthropometry↗
PubMed1979

Machakos Project Studies: Agents affecting health of mother and child in a rural area of Kenya. XIV. Growth pattern or rural Akamba pre-school children.

Between June 1974 and February 1977, in one eighth sample of the Machakos Project area, weight and height were determined in all 1-60 months-olds. This resulted in 568 subjects producing averagely 9.3 monthly growth data over an average period of 22.2 months. Only subjects examined five times or over were considered. Weighing and measuring were done by home visiting fieldworkers. Growth in the first six months closely followed the Harvard Standards of weight-for-age (W/A) and height-for-age (H/A). In the course of the next six months this dropped until about 83% for W/A and 92% for H/A, to stay at these levels until the sixth year. In the group which persistently grew over 88% for W/A these values were 91.5% for W/A and 94.8% for H/A. This group is thought to represent the local standard for optimum growth. In the group which persisted at levels below 75% of W/A a distinction was made between normal slow growers and PEM cases. In both W/A was more compromitted than H/A. Children persistently or episodically under W/A 70% were considered malnourished; their incidence in the 1-5 year group was between 4.5 and 6.5%. There was no reason to put the PEM level above 70% of W/A; This should be used as a cut-off level for screening PEM cases. A diagram is presented to visualize the successive age cohorts simultaneously for W/A, H/A and W/H as regards their position to the respective Harvard Standards, indicating percentages of positive and negative deviators.

Body Height↗