Salmonella infections and cholera, although rare, can be devastating diseases and it would be wise to get to a hospital as soon as possible if these were suspected. Fasting, peculiar diets and the consumption of large quantities of yoghurt have not been found useful in calming travellers diarrhoea or in rehabilitating inflamed bowels. Oral rehydration has on the other hand, especially in children, been a life saving technique and should always be practised, whatever other treatment you use. As there is some evidence that alcohol and milk might prolong diarrhoea they should be avoided during and immediately after an attack. There are ways of preventing travellers diarrhoea for short periods of time by taking antibiotics, but this is not a foolproof technique and should not be used other than in exceptional circumstances.
Doxycycline is possibly the best drug.
Some preventatives such as Enterovioform can have serious side effects if taken for long periods. Paradoxically constipation is also common, probably induced by dietary change, inadequate fluid intake in hot places and long bus journeys. Simple laxatives are useful in the short-term and bulky foods such as maize, beans and plenty of fruit are also useful. Heat and Cold Full acclimatization to high temperatures takes about 2 weeks. During this period it is normal to feel a bit apathetic, especially if the relative humidity is high.