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At least 64 students of Government Science Secondary School in Batagarawa, Katsina State, were rushed to hospital after developing adverse reactions following the administration of drugs aimed at preventing and treating bilharzia (schistosomiasis).
The incident, which unfolded during a routine school-based mass drug administration exercise, triggered panic among parents and the school community, particularly after reports that some students arrived unconscious.
The students were taken to Ahmadi Rimi General Hospital and Turai Yar’Adua Maternal and Child Hospital in Katsina. Symptoms included vomiting, stomach pain, and dizziness. Medical Director of Ahmadi Rimi General Hospital, Dr Auwal Sani, confirmed that some arrived unconscious but were responding well to treatment. He noted that dosages had been determined by measuring the students’ heights—a standard practice in these campaigns.
Two affected students, Abubakar Muhammad and Hassan Muhammad, described the variation in tablets given: some received three, others two, and some one, based on height. A parent, Ma’aruf Sani, who visited his children at the hospital, reported that they had fully recovered. Katsina State Commissioner for Basic and Secondary Education, Yusuf Sulaiman Jibia, confirmed the incident and the recovery of the students.
“The affected students have fully recovered, and we are making arrangements for their return to school,” he said. The exercise was organised by Primary Health Care Authorities in collaboration with Batagarawa Local Government Area. Jibia urged calm, promised an investigation into what went wrong, and noted that food was being provided before the students returned to school.
As of the latest reports, no official findings have clarified whether the reactions stemmed from the medication itself, dosage issues, administration conditions, or other factors. Preventive treatment campaigns of this kind are standard in bilharzia-endemic communities.
Bilharzia: A Persistent Neglected Tropical Disease
Bilharzia, or schistosomiasis, is caused by parasitic blood flukes of the genus Schistosoma. People become infected when the larval form of the parasite, released by freshwater snails, penetrates the skin during contact with contaminated water—while swimming, fishing, washing clothes, or fetching water.
Once inside the body, the parasites mature into adult worms that live in blood vessels and release eggs. Some eggs are excreted in urine or faeces (continuing the cycle if they reach water), while others become trapped in tissues, triggering inflammation and organ damage.
There are two main forms relevant to Africa: urogenital (primarily Schistosoma haematobium, causing blood in urine, bladder and kidney damage, and in severe cases links to bladder cancer or genital lesions) and intestinal (S. mansoni and others, leading to abdominal pain, diarrhoea, blood in stool, and liver or spleen enlargement).
School-aged children are especially vulnerable due to play habits and incomplete hygiene practices. Chronic infection can cause anaemia, stunted growth, impaired cognitive development, and reduced ability to learn or work—effects that are often reversible with timely treatment but accumulate if left unchecked.
Globally, more than 250 million people required preventive treatment in recent estimates, with over 93% of those in need living in Africa. Nigeria carries one of the heaviest burdens in sub-Saharan Africa.
Transmission thrives in rural and peri-urban areas with limited access to safe water and sanitation, and near dams or irrigation schemes that expand snail habitats. In northwestern states including Katsina, environmental conditions and water-contact patterns sustain local transmission, making school-based interventions a logical focus.
Mass Drug Administration: The Backbone of Control
The World Health Organization’s primary strategy for controlling schistosomiasis is preventive chemotherapy through periodic large-scale treatment with praziquantel. This is delivered via mass drug administration (MDA), often targeting school-aged children because they are both highly affected and relatively easy to reach through schools. Treatment is typically given annually or at intervals determined by local prevalence. Praziquantel is effective against adult worms of all major species, relatively inexpensive, and considered safe at the recommended single dose of 40 mg/kg.
Because accurate weighing is impractical in large campaigns, health workers commonly use a “dose pole”—a height-based measuring stick that estimates the number of tablets needed. Studies have generally found this method reasonably accurate for most children, though it is not perfect and can lead to slight under- or over-dosing in some individuals. In the Batagarawa case, officials explicitly stated that heights were measured to determine dosage, consistent with standard guidelines.
Side effects of praziquantel are well-documented and usually mild and transient. Common reactions include abdominal pain or discomfort, nausea, vomiting, dizziness, headache, and fatigue. These often appear more frequently or intensely in individuals with higher worm burdens, because the dying parasites release antigens that provoke an immune response. Research has linked post-treatment abdominal symptoms and vomiting to pre-treatment infection intensity. Most effects resolve within a day. Severe reactions are uncommon when the drug is administered correctly.
In practice, several factors can amplify reactions during school campaigns: administration on an empty stomach, slight dosage inaccuracies from height-based estimation, variations in drug quality or batch, individual differences in metabolism or sensitivity, concurrent infections or malnutrition, or inadequate pre-campaign community sensitisation. Providing food after treatment—as authorities in Katsina arranged—is a recognised good practice that can help mitigate gastrointestinal effects.
Context, Challenges, and the Need for Transparency
Nigeria has scaled up schistosomiasis MDA in recent years as part of broader neglected tropical disease (NTD) control efforts, often integrating it with treatment for soil-transmitted helminths or other interventions. Coverage has improved, contributing to reductions in prevalence among school-aged children in many areas, yet gaps remain in reach, monitoring, and complementary measures such as safe water, sanitation, snail control, and sustained behaviour change.
Incidents like the one in Batagarawa, even when outcomes are ultimately positive, can erode public confidence. Parents naturally fear for their children’s safety, and rumours can spread quickly in the absence of clear, timely communication. This underscores the importance of thorough investigation—not only to identify any preventable errors in dosing, drug handling, or procedure, but also to reinforce trust in essential public health programmes. Transparent findings, whether they point to expected pharmacological effects amplified by infection intensity, logistical issues, or other causes, help communities understand that the benefits of treatment far outweigh the usual transient risks.
Broader lessons include strengthening pre-MDA education so that families know common side effects are expected and temporary; ensuring consistent drug quality and cold-chain or storage standards where relevant; refining dose estimation where feasible; and pairing drug delivery with nutrition support and follow-up. Long-term success against bilharzia also depends on addressing the environmental and infrastructural drivers of transmission. Treatment alone reduces morbidity and intensity of infection but does not stop reinfection if people continue to contact contaminated water.
Recovery and the Road Ahead
Authorities have confirmed that the affected students have recovered and are preparing to return to school, with food support provided. An official investigation is underway to establish the precise circumstances. While the immediate crisis appears resolved, the episode highlights both the reach of Nigeria’s NTD control efforts and the operational challenges that accompany them.
Schistosomiasis remains a disease of poverty and inadequate water infrastructure. Mass treatment with praziquantel has proven one of the most cost-effective tools available, dramatically lowering the risk of severe organ damage and improving children’s health and educational prospects when delivered consistently. Maintaining community trust through careful implementation, honest communication about side effects, and rigorous follow-up after any adverse events is essential if these programmes are to continue succeeding.
Parents, educators, and health workers in endemic areas like Batagarawa play critical roles. Supporting evidence-based campaigns while demanding accountability and continuous improvement offers the best path to reducing the burden of this preventable parasitic disease for the next generation of Nigerian students.
Samuel O. Sulaimon is the founder and Editor-in-Chief of Naijapiz. He covers Global, News, Sports, Finance, Faiths, Education, Politics and Technology.
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