Table Widal agglutinin titres in Nigerian patients with or without a positive malaria smear
| Group | Patients (n) | 1:40 | 1:80 | 1:160 |
| 1 1-150(PMS, NSTC, LPTI) | 45 | 85% | 12% | 3% |
| 2 1-150(NMS, NSTC, LPTI) | 69 | 45% | 15% | 10% |
↵1-150 PMS = positive malaria smear; NMS = negative malaria smear; NSTC = negative S typhi culture; LPTI = lack of prior typhoid immunisation.