| Authors | Effective | Mortality |
| Atamanalp S. S., 2011 [15] | 447 | 72 (16.1%) |
| Naseer, Pakistan, 2010 [13] | 30 | 1 (3.33%) |
| Ghariani, Tunis, 2010 [9] | 40 | 4 (10%) |
| Nuhu, Nigeria, 2010 [2] | 48 | 5 (10.4%) |
| Traoré D, Mali, 2013 [3] | 96 | 7 (7.3%) |
| Togo A, Mali, 2014 [4] | 138 | 2 (0.01%) |
| Sani R, Niger, 2003 [6] | 68 | 13 (19.12%) |
| Our study | 70 | 2 (2.86%) |