Strung Treng was an unexpected stop over, more a hospital visit then the usual tourist stuff. I was waiting in a guest house restaurant for the bus to Laos when i was rather suddenly overcome with a fever and fatigue. I rented a room and slept for almost 24 hours straight. The manger was understandably concerned, he thought it might have been Malaria, and sent me to the doctor for tests. It wasn't Malaria but was probably Dengue Fever but I needed a 10 hour bus trip back to Phnom Pehn to confirm this. Either way the 'cure' was Panadol, plenty of water and rest. I was going to do this in Laos anyway so decided against the bus back to Phnom Pehn and caught the bus to Laos the next day instead.