Under WA's Occupational Safety and Health Act 1984, staff members are responsible for their own health and safety and must take reasonable care to avoid adversely affecting the health or safety of any other person through any act or omission.
All laboratory biological specimens should be regarded as hazardous and may be viewed as falling into one of the following categories:
Routine specimens for which there is no history suggesting they present an increased biohazard.
Infected specimens regarded as possibly presenting a high biohazard include specimens from patients whose clinical history indicates the possibility of the following:
These specimens and cultures must have a biohazard label affixed to the specimen container.
Always wear protective clothing, particularly disposable gloves. When handling samples and spilled material, masks may be required if there is the potential for aerosol production.
Gloves should be removed in such a way that the skin does not come into contact with the external surface of the glove. At regular intervals the correct procedures should be demonstrated by senior laboratory personnel.
All glassware contaminated with fluid should be discarded into a strong solution of sodium hypochlorite (approximately 0.5 per cent available chlorine). Disposable apparatus should be discarded into a wet strength bag that is autoclaved prior to being sent for incineration. (Refer to the Waste management safety for more information.)
Centrifuges used for spinning body fluids should have a sealed rotor and/or sealed buckets with transparent lids which allow staff to see if a breakage has occurred. In the event of a breakage during centrifugation, the whole bucket can be autoclaved before the lid is removed.
In some laboratory practical classes, exercises using blood have been devised where the blood samples used are obtained from staff or students by venepuncture or a finger prick or from patients with diseases of special interest. Other body fluids (such as urine and saliva) may be used and obtained from students and patients.
If patient blood samples are used, the samples should be screened just as blood would be at the blood bank (viz: tested for syphilis, Hepatitis B and HIV) prior to use in the practical class.
If student blood samples are used, individual students should, if practicable, use their own blood.
Note: Students or staff who know they are HIV-positive should be requested not to participate in these exercises.
If any body fluid is spilled, it should be cleaned up immediately with a liberal quantity of 70 per cent alcohol followed by a strong solution of sodium hypochlorite (approximately 0.5 per cent available chlorine).
Laboratory coats contaminated with body fluid must be placed in a chlorine bath for 30 minutes.
Material used to clean up the spill must be disposed of separately via autoclaving. (Refer to Waste management safety.)
Infectious diseases may be spread by 'sharps', the collective term used for infected needles or other sharp implements that cause injury. Accordingly, every precaution must be taken to prevent such accidents.
Needles and syringes are to be discarded only into approved containers of the BUNZYL (needles only) or SHARPSAFE types. These containers should:
Never attempt to replace the cap on a needle after use as this may lead to a 'needlestick' injury.
Sharps containers should be disposed of in accordance with local guidelines.