Specimen containing dangerous pathogen
Those delivering, receiving and examining specimens must be informed if a specimen is likely to contain highly infection organisms. Such specimen should be labelled HIGH RISK, and whenever possible carry a warning symbols such as red dot, star or triangle
Specimen which should be marked as HIGH RISK include:
Sputum likely to contain M. tuberculosis
Faecal specimen that may contain V. cholerae or S.typhi
Fluid from ulcers postules that may contain anthrax bacilli or treponemes
Specimens from patient with suspected HIV infection, hepatitis, viral haemorrhagicfever, or plague.
Preservatives and transport media for microbiological specimen
In general, specimens for microbiological investigations should be delivered to the laboratory as soon as possible. This will help to ensure that pathogens are living when they reach the labratory.
When a delay in delivery is unavoidable, For example, when transporting a specimen from health center to a hospital laboratory, a suitable chemical preservative or transport culture medium must be used.