Transmission has also rarely followed bites from infected persons. The severity of the disease ranges from inapparent infections which can only be detected by laboratory tests to fulminating of fatal cases. Hepatitis A Hepatitis A is transmitted by the faecal-oral route. Spread is most common through contaminated food or drink. Hepatitis A in healthcare workers has occasionally been seen in residential institutions for the mentally handicapped.
Workers involved in sewage treatment facilities are also potentially at risk.
However, the acute disease can be debilitating in some adults and occasional cases of fulminating Hepatitis A have been recorded. Tetanus Tetanus is a serious life-threatening condition caused by the toxin produced by Clostridium tetani. The spore forming ability of the organism means that it will survive indefinitely in samples unless they are specifically inactivated. Transmission is via skin wounds and is believed to have been imperceptible in some cases. These students should obtain Hepatitis B immunisation, at least six months before the work is due to commence.