Medical Lab Specimen Preparation and Culture Media Training

Objectives:
• Understand the role of medical laboratories in healthcare.
• Identify key laboratory departments and their functions.
• Recognize the importance of specimen quality and integrity.
• Describe the workflow from specimen collection to reporting.

Topics:
• Overview of medical laboratory services
• Laboratory departments: haematology, microbiology, chemistry, etc.
• The total testing process: pre-analytical, analytical, post-analytical
• Importance of specimen quality and patient safety
• Introduction to laboratory safety and infection control

Objectives:
• Apply standard precautions and biosafety levels.
• Identify hazards in the laboratory setting.
• Demonstrate proper use of personal protective equipment (PPE).
• Describe waste management and spill procedures.

Topics:
• Biosafety levels and risk groups
• Standard precautions: hand hygiene, PPE, sharps disposal
• Chemical, biological, and physical hazards
• Spill management and decontamination
• Waste segregation and disposal regulations

Objectives:
• Describe correct procedures for blood, urine, and swab collection.
• Identify appropriate collection tubes and additives.
• Explain patient identification and labelling requirements.
• Discuss factors affecting specimen quality.

Topics:
• Venipuncture and capillary puncture techniques
• Blood collection tubes: order of draw, additives, anticoagulants
• Urine collection: clean-catch, midstream, 24-hour
• Swab collection for microbiology
• Patient identification and labelling protocols
• Pre-analytical variables and their impact

Objectives:
• Describe proper handling and transport conditions for various specimens.
• Explain the importance of temperature and time constraints.
• Identify storage requirements for different analytes.
• Discuss chain of custody for forensic specimens.

Topics:
• Specimen stability and preservation
• Transport media and containers
• Temperature requirements: room temp, refrigerated, frozen
• Time limits from collection to processing
• Chain of custody documentation
• Rejection criteria for unsuitable specimens

Objectives:
• Define culture media and their purpose in microbiology.
• Classify media based on composition and function.
• Describe the components of culture media.
• Explain the concept of selective and differential media.

Topics:
• What is culture media? Importance in microbial growth
• Classification: solid vs liquid, simple vs complex
• Nutrient requirements: carbon, nitrogen, minerals, growth factors
• Selective, differential, and enriched media
• pH indicators and inhibitors
• Sterilization of media: autoclaving, filtration

Objectives:
• List steps for preparing culture media from dehydrated powders.
• Calculate correct amounts using manufacturer instructions.
• Demonstrate proper mixing, heating, and dispensing.
• Describe quality control checks for prepared media.

Topics:
• Reading and interpreting media preparation instructions
• Weighing and rehydration techniques
• Heating and boiling to dissolve agar
• pH adjustment and measurement
• Dispensing into tubes, plates, and bottles
• Sterilization cycle parameters
• Quality control: sterility testing, performance testing

Objectives:
• Compare sterilization methods: moist heat, dry heat, filtration, radiation.
• Demonstrate aseptic technique in media preparation.
• Explain the principles of autoclave operation.
• Describe monitoring of sterilization using indicators.

Topics:
• Autoclave: principle, operation, validation
• Dry heat ovens and incineration
• Membrane filtration for heat-sensitive media
• Chemical and biological indicators
• Aseptic technique: hand washing, flame sterilization, laminar flow
• Prevention of contamination during media preparation

Objectives:
• Identify commonly used culture media: Blood Agar, MacConkey Agar, etc.
• Describe the selective and differential properties of each.
• Explain the applications of each medium in clinical microbiology.
• Recognize the appearance of typical growth on each medium.

Topics:
• Blood Agar: enriched, hemolysis patterns
• MacConkey Agar: selective for Gram-negative, lactose fermentation
• Chocolate Agar: for fastidious organisms
• Mannitol Salt Agar: selective for Staphylococci
• Sabouraud Dextrose Agar: for fungi
• Lowenstein-Jensen medium: for Mycobacteria
• Transport media: Stuart's, Cary-Blair

Objectives:
• Define quality control parameters for culture media.
• Perform sterility and growth promotion tests.
• Document QC results and take corrective actions.
• Understand the role of reference strains.

Topics:
• QC protocols: visual inspection, pH check, sterility test
• Growth promotion testing with ATCC strains
• Selective and differential performance checks
• Documentation and record keeping
• Corrective actions for failed QC
• Expiry dating and storage conditions

Objectives:
• Describe the steps for processing various clinical specimens.
• Explain inoculation techniques for different media.
• Discuss the importance of specimen-to-media ratio.
• Identify appropriate incubation conditions.

Topics:
• Processing urine, stool, sputum, wound swabs, blood cultures
• Inoculation methods: streak plate, spread plate, pour plate
• Selective enrichment techniques
• Incubation temperature, atmosphere, and duration
• Anaerobic culture methods
• Specimen processing workflow and biosafety

Objectives:
• Perform Gram stain and interpret results.
• Describe other staining methods: Ziehl-Neelsen, Giemsa, etc.
• Use microscope correctly and identify basic morphology.
• Recognize common artefacts.

Topics:
• Brightfield microscopy: parts, focusing, oil immersion
• Gram stain: principle, steps, interpretation
• Acid-fast stain for Mycobacteria
• Giemsa stain for parasites
• Wet mounts and India ink preparations
• Artefacts and common pitfalls

Objectives:
• Explain the principle of common biochemical tests.
• Perform and interpret catalase, oxidase, coagulase tests.
• Describe the use of commercial identification systems.
• Understand the role of API strips and automated systems.

Topics:
• Catalase test: principle and interpretation
• Oxidase test: for Pseudomonas and Neisseria
• Coagulase test: for Staphylococcus aureus
• Indole, MR-VP, citrate, urease tests
• Triple Sugar Iron (TSI) agar
• API and VITEK systems overview
• Interpretation of biochemical profiles

Objectives:
• Describe disk diffusion (Kirby-Bauer) method.
• Interpret zone diameters using CLSI guidelines.
• Explain MIC determination by broth dilution.
• Discuss the importance of AST in treatment.

Topics:
• Kirby-Bauer disk diffusion: procedure and standardization
• Mueller-Hinton agar preparation
• Inoculum preparation and lawn inoculation
• Incubation and measurement of inhibition zones
• CLSI breakpoints and interpretation
• E-test for MIC
• Automated AST systems

Objectives:
• Describe blood culture collection and processing.
• Explain the use of automated blood culture systems.
• Process CSF, pleural, and other sterile fluids.
• Identify common pathogens from these sites.

Topics:
• Blood culture bottles: aerobic, anaerobic, pediatric
• Automated systems: BACTEC, BacT/ALERT
• Subculture and Gram stain from positive bottles
• CSF processing: cell count, Gram stain, culture
• Body fluids: pleural, peritoneal, synovial
• Interpretation of positive cultures and contamination

Objectives:
• Perform semi-quantitative urine culture.
• Interpret colony counts and significance.
• Describe urine dipstick and microscopic analysis.
• Identify common urinary pathogens.

Topics:
• Clean-catch midstream urine collection
• Calibrated loop technique for colony count
• Culture on CLED and MacConkey agar
• Interpretation: significant bacteriuria vs contamination
• Urine dipstick: leukocyte esterase, nitrite, pH, etc.
• Microscopic examination: WBCs, RBCs, casts, crystals

Objectives:
• Process stool specimens for bacterial pathogens.
• Perform ova and parasite examination.
• Describe selective media for stool pathogens.
• Identify common intestinal parasites.

Topics:
• Stool culture for Salmonella, Shigella, Campylobacter, E. coli O157
• Selective media: XLD, HE, SS agar
• Enrichment broths: Selenite, GN
• Ova and parasite exam: direct wet mount, concentration techniques
• Permanent stains: trichrome, iron hematoxylin
• Common parasites: Giardia, Entamoeba, Ascaris

Objectives:
• Process sputum and throat swabs.
• Identify normal flora and pathogens.
• Process wound swabs for aerobic and anaerobic culture.
• Interpret culture results in clinical context.

Topics:
• Sputum: quality assessment, Gram stain, culture
• Throat swab: Group A Streptococcus detection
• Lower respiratory: BAL, bronchial washings
• Wound swab: aerobic and anaerobic culture
• Anaerobic transport and culture methods
• Interpretation: mixed flora vs predominant pathogen

Objectives:
• Describe processing of specimens for mycobacteria.
• Perform Ziehl-Neelsen stain and culture.
• Describe culture for fungi.
• Identify common fungal pathogens.

Topics:
• Specimen decontamination and concentration for AFB
• Ziehl-Neelsen and auramine-rhodamine stains
• Culture on Lowenstein-Jensen and MGIT
• Identification: niacin, nitrate reduction
• Fungal culture: Sabouraud agar, with antibiotics
• Lactophenol cotton blue mount for identification
• Common fungi: Candida, Aspergillus, Dermatophytes

Objectives:
• Enter specimen data into LIS.
• Generate and verify laboratory reports.
• Communicate critical values.
• Understand legal and ethical aspects of reporting.

Topics:
• LIS functions: accessioning, result entry, validation
• Quality control data management
• Report formats: preliminary, final, cumulative
• Critical value notification protocols
• Confidentiality and data protection
• Medico-legal considerations in reporting

Objectives:
• Consolidate knowledge from the course.
• Demonstrate competence in practical skills.
• Complete written and practical assessments.
• Receive feedback and certification.

Topics:
• Review of key concepts: specimen preparation, media, identification
• Practical assessment: specimen processing, media preparation, Gram stain, AST
• Written examination
• Feedback session
• Certification and next steps