Sewer and drain swabbing as a means of investigating XXXX .

@entity1 @entity281 @entity5746 @entity1707
The use of gauze swabs in drains or sewers to clarify the path followed by a salmonella from source to @entity1 host has been reviewed in the light of experience gained in Cardiff over 15 years. This period has seen a marked change in attitudes to salmonella epidemiology in that infected food is now regarded as of greater importance than @entity281 . In these 15 years, butchers, abattoirs and knackers' yards, markets and bakehouses have been monitored. In the bakehouse survey the existence of staff @entity281 was demonstrated by sewage examination. Sewage investigation has also been used to show frequent entry of salmonellas into households in a residential estate. The estate was carefully chosen to exclude salmonellas from industrial sources and shops. The frequent finding of @entity281 in this sewage implies that a commonly consumed heavily infected food item is involved. The wide range of serotypes isolated suggests an animal usually fed on infected animal feed. Poultry and @entity1707 are put forward as animals liable to spread @entity5746 to @entity1 .It is hoped that clarification of the salmonella pathway may eventually lead to measures likely to prevent the transmission of @entity281 to @entity1 . It is also suggested that swabs placed in abattoir drains serve as an economical method of obtaining warning of a persistent build-up of contamination. The persistence of a serotype in an abattoir is not infrequently followed by @entity1 @entity281 .
