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Targeted chemotherapy for parasite infestations in rural black preschool children
M Taylor1, G Pillai, J D Kvalsvig
1Department of Pharmacology, University of Durban-Westville.
Insights
Targeted chemotherapy significantly reduced parasitic infections in rural South African preschool children. Regular deworming is effective, but improved sanitation is crucial for long-term parasite control.
Area of Science:
- Public Health
- Infectious Diseases
- Pediatrics
Background:
- Parasitic infections are a significant health burden in rural communities.
- Preschool children are particularly vulnerable to the effects of these infections.
Purpose of the Study:
- To evaluate the effectiveness of targeted chemotherapy in reducing parasite prevalence among rural black preschool children.
- To assess reinfestation rates following treatment.
Main Methods:
- A before/after trial was conducted over 21 weeks in rural KwaZulu/Natal.
- Stool and urine samples were analyzed from 200 children (4-6 years old).
- Targeted chemotherapy included albendazole, praziquantel, and metronidazole, administered twice.
Main Results:
- Significant reductions in Ascaris lumbricoides, Trichuris trichiura, and Necator americanus were observed post-treatment.
- Reinfestation rates at 12 weeks varied by parasite: 16% (A. lumbricoides), 33% (T. trichiura), 24% (Giardia lamblia), and 3% (N. americanus).
- No reinfestation occurred for Schistosoma haematobium, Hymenolepsis, or Taenia species.
Conclusions:
- Targeted chemotherapy at regular intervals can effectively lower parasite prevalence in children.
- Sustainable parasite control requires concurrent improvements in clean water and sanitation infrastructure for rural South African communities.
Objective:
To investigate whether targeted chemotherapy can reduce parasite prevalence rates in rural black preschool children.
Design:
The study consisted of a before/after trial. Stool and urine samples were analysed on four occasions over a 21-week period.
Setting:
Crèches in two rural areas of southern KwaZulu/Natal (coastal and inland).
Patients:
Two hundred children of 4-6 years of age attending 19 crèches in the area.
Intervention:
Targeted chemotherapy using albendazole for nematode infestations, praziquantel for trematode and cestode infestations and metronidazole for protozoal infections was administered twice at an interval of 14 weeks.
Main Outcome Measure:
Prevalence rates.
Results:
The prevalence of Ascaris lumbricoides, Trichuris trichiura and Necator americanus infestation decreased significantly after treatment. Reinfestation rates 12 weeks after treatment were 16% for A. lumbricoides, 33% for T. trichiura, 24% for Giardia lamblia and 3% for N. americanus. No reinfestation was noted for Schistosoma haematobium, Hymenolepsis or Taenia species.
Conclusion:
The study suggests that parasite prevalence rates in children can be reduced by the administration of appropriate chemotherapy at regular intervals. However, the provision of clean water and adequate sewerage facilities remains a high priority for black communities living in rural areas of South Africa.
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