H. pylori infection is most often found in people who live in confined spaces with many others. This would explain why a higher percentage of people who live in socio-economically poor conditions are infected. It is also very easy to be re-infected.
The infection is present in saliva and is thought to be in faeces too. Obviously, good personal hygiene is important in preventing the spreading of this infection.
It is also found more often in people over the age of 65 and the reason for this is thought to be that many of them were infected as a result of living conditions during the Second World War.
(Susan Erasmus, Health24, June 2004)
What can I do to prevent dyspepsia?