| Authors. | Effective/sampling time | Percentage/year |
| Codina, Espagne, 2011 [2] | 54/12 year | 4.5 case/year |
| Cirocchi, Italie, 2010 [3] | 23/12 year | 1.9 case/year |
| Naseer, Pakistan, 2010 [4] | 30/2 year | 15 case/year |
| Zhonghua, China 2011 [5] | 52/8 year | 6.5 case/year |
| Dembélé C, Mali 2014 [1] | 54/4 year | 13.5 case/year |
| Notre étude, Mali, 2020 | 320/12 year | 26.7 case/year. |