Nodding disease in northern Uganda
From 2009 thousands of children in northern Uganda were reported with nodding syndrome, a disabling illness of repeated head-nodding seizures that many families blamed on curses or the spirits of the war dead.
2009 CE · 3.29, 32.88 · status: disputed
The account
The disease was first described in 1962 in the Mahenge hills of Tanzania and later appeared in South Sudan and Uganda, mainly around Kitgum and Pader. Affected children stopped growing and some wandered off or died in accidents. Health workers found a strong link with the parasitic worm that causes river blindness.
The sceptical view
Research points to an autoimmune reaction triggered by the Onchocerca worm; the exact mechanism is still being studied, which leaves room for spirit explanations locally.
The researched reading
A real and devastating neurological disease linked to a parasitic worm, probably through an autoimmune reaction. The spirit explanations reflect grief and war, not the cause.
| Explanation | Weight | Why |
|---|---|---|
| A known natural phenomenon | 50% | Cases cluster where the parasitic worm Onchocerca volvulus is common, and decline with worm control. Research found antibodies against a worm protein that cross-react with the brain protein leiomodin-1, an autoimmune mechanism. |
| Undetermined | 32% | The share a generic explanation had beyond what has been shown for this case: it fits many cases like this one, but has not been demonstrated for this one. |
| Something in the surroundings | 7% | Toxins in contaminated relief food, mycotoxins and nutritional deficiencies were investigated as co-factors in displacement camps. |
| A cultural story | 7% | Families blamed curses and the spirits of the war dead, which shaped responses but not the disease itself. |
| Perception, memory or mind | 2% | EEG-confirmed seizures and brain atrophy rule out a psychogenic illness. |
| A hoax or fabrication | 1% | Not applicable. |
| Genuinely anomalous | 1% | Its mechanism is being worked out within ordinary medicine. |
Official position: WHO and CDC treat it as a neurological epilepsy syndrome strongly associated with onchocerciasis.