The survivors, all 20 to 40 years old, are being treated for hypothermia, kidney failure and pulmonary problems.
Two female survivors were being treated for injuries that were not life-threatening.
He said eight survivors were being treated there, all of them conscious and in stable condition.
Both survivors and immediate witnesses of traumatic events in family history has traditionally been treated by family therapist.
Two injured survivors were treated on U-155 before water, supplies and directions were handed over to their colleagues.
A doctor at a hospital in Miramshah said that the survivors were treated there for multiple shrapnel wounds.
The six survivors were all treated at a local hospital for various minor injuries, and released.
Nine survivors are still being treated at local hospitals.
Following the eruption, many survivors were treated at the main hospital in Yaoundé, the country's capital.
Six survivors were taken to a military hospital and treated for burn wounds, a doctor said.