GLI GLI Quality Tool
GLI Quality Tool — Version 2.0

Developing an MDR TB Contact Specimen Protocol for Australian Labs

Tuberculosis remains a low-incidence but persistent concern across Australia, with multidrug-resistant strains posing an outsized risk whenever they appear. State and territory notification systems record a small but steady stream of MDR-TB cases each year, most often among people born overseas or returning from extended travel. Contact investigation around an index case crosses hospital, community, and laboratory boundaries, and a written protocol the laboratory team can follow without improvisation is essential. For Australian laboratories, the protocol must reconcile international guidance with local conditions, including vast distances between population centres and the role of Aboriginal Community Controlled Health Organisations.

The GLI Quality Tool offers a four-phase roadmap aligned with the twelve Quality Systems Essentials and supports laboratories at any stage of quality system maturity. Its checklists and user instructions suit varied resource profiles, making them useful for both a metropolitan reference laboratory in Sydney and a regional service hub in Darwin. The foundations set out in GLI Phase 1 foundations give a laboratory the scaffolding it needs before drafting a specimen-handling procedure, since staff responsibilities, equipment records, and documentation practices are addressed before test-specific work begins.

This article walks through the practical steps of building a protocol for collecting and testing specimens from close contacts of an MDR-TB patient. It covers the Australian regulatory backdrop, field collection, long-distance transport, laboratory processing, drug-resistance testing, documentation, and quality monitoring, then closes with a short list of recommendations for laboratories ready to formalise their own procedures.

Australian regulatory and public health context

Tuberculosis sits within a federated public health system, and the legal instruments governing specimen handling vary between jurisdictions. New South Wales operates under the Public Health Act 2010, Victoria under the Public Health and Wellbeing Act 2008, and Western Australia under the Health Act 1911, with each requiring laboratories to notify confirmed or suspected cases. NATA accreditation to ISO 15189 is the de facto requirement for any laboratory offering TB culture or molecular testing, reinforced by the Royal College of Pathologists of Australasia quality assurance programs. Reference services such as the Queensland Mycobacterium Reference Laboratory in Brisbane and the Victorian Infectious Diseases Reference Laboratory in Melbourne handle confirmatory testing and are usually the final destination for specimens from regional and remote areas. The National Tuberculosis Advisory Committee and the Communicable Diseases Network Australia publish position statements that frequently inform local standard operating procedures, which laboratories often cite to make their authority clear.

Specimen collection from close contacts in the field

Specimens from contacts of an MDR-TB patient are most often sputum samples, but bronchoalveolar lavage, gastric aspirates, and induced sputum also appear in field protocols depending on age and clinical picture. Collection usually happens at a clinic, a community health centre, or during a home visit by a public health nurse, and the protocol needs to spell out consumables, order of draw, and labelling expected at the bedside. In remote parts of the Northern Territory and northern Western Australia, Aboriginal Community Controlled Health Organisations are often the first point of contact, and procedures must accommodate collection by staff not directly employed by the testing laboratory. The protocol should describe the timing of specimens relative to the exposure window, the minimum volume expected, and what to do when a contact cannot produce sputum on the day of the visit.

Transport and chain of custody across the country

Australia's geography is the single biggest logistics challenge for a contact-investigation protocol. A specimen collected in Kununurra or Alice Springs may need to reach a reference laboratory in Perth, Adelaide, or Brisbane within 48 to 72 hours to preserve mycobacterial viability. The protocol should specify triple packaging consistent with IATA dangerous goods requirements, the inclusion of cold packs for longer routes, and the courier options proven reliable for category B biological substances. Chain of custody covers the order in which documents travel with the specimen, who holds the original request form, and how electronic manifests are reconciled on arrival. Many Australian laboratories use Auslab-style information systems, and the protocol should note how the contact identifier is linked to the index case so that results return to the right public health unit.

Laboratory processing, biosafety, and culture

On arrival, specimens are processed in a containment laboratory that meets AS/NZS 2243.3 for safety in microbiological facilities, aligning with WHO guidance on BSL-3 practices for TB work. The protocol should describe the decontamination method in use, the choice of liquid and solid culture media, and the incubation conditions expected. Daily reading schedules and subculturing responsibility need to be assigned to named roles. Labelling is the kind of step that is easy to overlook until a contamination event or a mixed-up result creates a clinical incident. The how to implement a labeling standard for TB culture tubes and slants guide from the GLI Quality Tool walks through a labelling system that works in laboratories with handwritten and printed workflows, worth adapting for sites that use different methods. The protocol should also cover what is written on the lid, side, and base of the slant, and how patient identifiers survive prolonged incubation.

Drug susceptibility testing for MDR-TB contacts

DST for contacts of an MDR-TB patient has to address the index case resistance profile while remaining alert to additional acquired resistance. Phenotypic methods on MGIT or Löwenstein-Jensen media remain the reference standard, and most Australian reference laboratories set up a panel that includes isoniazid, rifampicin, ethambutol, pyrazinamide, fluoroquinolones, and the second-line injectables. Genotypic methods such as line probe assays and whole-genome sequencing are widely used for rapid confirmation and shorten the time to a meaningful result for the contact's clinician. The protocol should describe the trigger for reflex testing, the interpretation of discordant genotypic and phenotypic results, and the reporting format that the treating team and public health unit will receive. A flow diagram helps contact-tracing nurses and junior medical officers understand what will happen after the specimen leaves the clinic, supporting better counselling during the waiting period.

Personnel, training, and documentation

Clear role definitions are the backbone of any contact-specimen protocol, and laboratories that try to operate with overlapping responsibilities usually find that errors appear during weekends or staff changes. The GLI Quality Tool offers practical advice through its writing clear job descriptions for TB laboratory staff resource, worth consulting when the laboratory is creating or updating duty statements. Position descriptions in Australian laboratories typically sit within an industrial agreement, so the protocol can refer to those documents rather than restating award conditions. Training records should show that each staff member has read the protocol, has been observed performing the procedure at least three times, and has been signed off by a senior scientist. Competency assessments are reviewed annually, and the protocol should specify what triggers an out-of-cycle reassessment, such as a documented error.

Quality monitoring and continual improvement

A protocol is only as useful as the review that follows its use, and Australian laboratories are expected to demonstrate continual improvement through internal audits, management review, and participation in external quality assurance schemes. Indicators worth tracking include the proportion of contact specimens received within the target transit time, the contamination rate of cultures, the turnaround time for first-line DST, and the number of rejected specimens with their reasons. Trends in these indicators are discussed at the laboratory's quality meetings and reported to the public health unit where they affect contact management. When something does not work as expected, the protocol should describe how a non-conformance is documented, investigated, and resolved, and how the lesson is folded back into the next revision. Version control, a named author, an approval date, and a planned review date on the front page signal to auditors that the document is actively maintained.

Recommendations for laboratories formalising a contact-specimen protocol

Specimens from contacts of an MDR-TB patient carry clinical, public health, and laboratory consequences, and the protocol that guides their handling is one of the clearest signals of a laboratory's maturity. The GLI Quality Tool four-phase roadmap brings structure to that work, and its checklists, user instructions, and downloadable materials can be adapted to the realities of Australian geography and regulation. Open the Phase 1 checklist, assign a lead author, and start drafting the next version of your contact-specimen protocol this week.