Via the Madagascar Tribune: The famadihana pointed out. The edited Google translation:
The Malagasy culture of exhumation of the dead or "famadihana" is blamed by many doctors as the cause of the non-eradication of the plague in Madagascar. Several parameters can prove it according to these doctors.
The beginning of the plague season begins with the beginning of the famadihana season. The plague and famadihana are mostly in the highlands. The bacillus of the plague Yersinia pestis survives long enough and conditions in the tombs are very favorable to their survival: absence of oxygen, darkness, humidity.
Once the tombs open, the bodies exhumed and taken out, the dust containing the plague bacilli stick on shoes, clothes and so on. This may explain the non-eradication of plague in Madagascar according to the health authorities. The latter want to start the debate on the subject already.
Note that at least two of the first victims of the plague in August 2017 had just returned from famadihana.