Precision mapping of schistosomiasis and soil-transmitted helminthiasis among school age children at the coastal region, Kenya.
PLoS Negl Trop Dis
; 17(1): e0011043, 2023 01.
Article
in English
| MEDLINE | ID: covidwho-2265991
ABSTRACT
BACKGROUND:
Accurate mapping of schistosomiasis (SCH) and soil transmitted helminths (STH) is a prerequisite for effective implementation of the control and elimination interventions. A precision mapping protocol was developed and implemented in the coastal region of Kenya by applying the current World Health Organization (WHO) mapping guide at a much lower administrative level (ward).METHODS:
A two-stage cluster survey design was undertaken, with 5 villages in each ward selected. From within each village 50 households were randomly selected, and a single child between the ages of 8 and 14 sampled following appropriate assent. The prevalence and intensity of infection of Schistosoma mansoni and STH were determined using the Kato-Katz method (single stool, duplicate slides) and urine filtration for S. haematobium.RESULTS:
Of the 27,850 school age children sampled, 6.9% were infected with at least one Schistosoma species, with S. haematobium being the most common 6.1% (95% CI 3.1-11.9), and Tana River County having highest prevalence 19.6% (95% CI 11.6-31.3). Prevalence of any STH infection was 5.8% (95% CI 3.7-8.9), with Lamu County having the highest prevalence at 11.9% (95% CI 10.0-14.1). The most prevalent STH species in the region was Trichuris trichiura at 3.1% (95% CI 2.0-4.8). According to the WHO threshold for MDA implementation, 31 wards (in 15 sub-Counties) had a prevalence of ≥10% for SCH and thus qualify for annual MDA of all age groups from 2 years old. On the other hand, using the stricter Kenya BTS MDA threshold of ≥2%, 72 wards (in 17 sub-Counties) qualified for MDA and were targeted for treatment in 2021.CONCLUSIONS:
The precision mapping at the ward level demonstrated the variations of schistosomiasis prevalence and endemicity by ward even within the same sub-counties. The data collected will be utilized by the Kenyan Ministry of Health to improve targeting.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Schistosomiasis
/
Helminthiasis
/
Helminths
Type of study:
Experimental Studies
/
Observational study
/
Qualitative research
/
Randomized controlled trials
Limits:
Adolescent
/
Animals
/
Child
/
Child, preschool
/
Humans
Country/Region as subject:
Africa
Language:
English
Journal:
PLoS Negl Trop Dis
Journal subject:
Tropical Medicine
Year:
2023
Document Type:
Article
Affiliation country:
Journal.pntd.0011043
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