FREE Medical Technologist Study Guide 2026: AMT MT

This free Medical Technologist study guide teaches the clinical-laboratory knowledge the American Medical Technologists (AMT) Medical Technologist (MT) exam tests, organized to the current AMT MT content outline.^[2] The MT is a generalist credential: you must know how to perform, troubleshoot, and interpret testing across every major section of the lab.

It’s interactive, not a wall of text: every module has built-in checkpoint quizzes, flashcards, and practice questions, so you learn laboratory science by doing — not just reading. If you are pursuing the ASCP generalist credential instead, the science is nearly identical — see our companion ASCP MLS study guide.

What the AMT MT Exam Is

The AMT Medical Technologist exam is a computer-based, multiple-choice test of about 200 questions taken in roughly 3 to 3.5 hours.^[1] It is scored on a scaled (criterion-referenced) scale of 0–100, with 70 required to pass—so your score is not a simple percentage of items correct. It tests the knowledge and judgment of a generalist laboratory scientist: not just facts, but recognizing errors, choosing the right method, and interpreting results in a clinical context.

The single most useful thing to know before you study: the MT exam mirrors the total testing process. Most items ask what a competent technologist would do at a given point — collecting the right specimen in the right tube, running and controlling the analysis, and interpreting and reporting the result — with quality, safety, and patient identification overriding everything.

AMT MT Exam Snapshot

The AMT MT content outline scores nine categories.^[2] Study by weight—Clinical Chemistry, Microbiology, and Hematology are the heaviest, and the top categories together make up the majority of the exam:

Module 1 · General Laboratory

One content category — about 12% of the exam. General Laboratory is the quality-and-safety floor under every test you run: quality control and statistics, specimen collection, laboratory safety and regulations, and the molecular methods now common across the lab.

1.1 Quality Control & the Westgard Rules

Quality control is the most testable part of General Laboratory. A Levey-Jennings chart plots daily control values against the established mean and standard-deviation limits.^[3]

The Westgard rules are statistical multirules applied to that data to catch error while limiting false rejection. The key distinction is between Random error (scattered points, reduced precision) and Systematic error (a trend or shift, reduced accuracy).

Two other QC tools recur. A Delta check compares a patient’s current result with their own previous result for the same test to flag possible mix-ups or errors. A Critical value (panic value) is a life-threatening result that must be reported immediately to a caregiver with a documented read-back.

1.2 Lab Math, Statistics & Beer’s Law

The MT exam expects fluent laboratory math. Know the difference between Accuracy (closeness to the true value) and Precision (reproducibility), and the Coefficient of variation (SD ÷ mean × 100) used to compare the precision of two methods — a lower CV is more precise. Beer's law underlies spectrophotometry: absorbance is directly proportional to analyte concentration and the light-path length, so a sample’s concentration is found by comparing its absorbance to a standard.

Dilutions are a recurring calculation: a 1:5 dilution means one part sample to four parts diluent (one part in five total), and the reported result is the read value multiplied by the dilution factor. Master simple dilution factors, unit conversions to SI units, and the standard-versus-unknown absorbance ratio.

1.3 Phlebotomy, Safety & Molecular Methods

Preanalytical errors cause many wrong results, so the Order of draw is high-yield: the CLSI sequence keeps tube additives from carrying over. The most-tested fact is that the citrate (light blue) tube comes before the EDTA (lavender) tube, because EDTA carryover chelates calcium and falsely prolongs coagulation results.

Know the difference between Serum and Plasma: plasma is from anticoagulated blood and still contains fibrinogen and clotting factors, while serum is from clotted blood and lacks them. On safety, the lab works under standard (universal) precautions, treating all specimens as potentially infectious, and most clinical work is biosafety level 2; chemical hazards are governed by the Safety Data Sheet, and an electrical fire needs a Class C extinguisher. U.S. lab testing quality is regulated under CLIA.

Molecular methods now appear across the exam. The polymerase chain reaction (PCR) amplifies DNA through repeated cycles of denaturation, annealing, and extension using heat-stable Taq polymerase; RT-PCR is used when the starting template is RNA, and real-time (quantitative) PCR follows amplification continuously with fluorescence. Gel electrophoresis separates nucleic-acid fragments by size in an electric field.

Module 2 · Clinical Chemistry

One content category — about 19% of the exam, the single largest. Clinical Chemistry measures the analytes that report on organ function: electrolytes and acid-base balance, kidney and liver markers, cardiac and pancreatic enzymes, glucose, lipids, and hormones.

2.1 Electrolytes, Acid-Base & Renal

Electrolytes are measured by ion-selective electrodes, which respond to the activity of the ion. The Anion gap (sodium minus chloride plus bicarbonate) classifies a metabolic acidosis: a high gap signals added acids (lactate, ketones, toxins), while a low gap usually reflects hypoalbuminemia. Acid-base interpretation is one of the most testable chemistry skills.

For the kidney, creatinine and BUN assess function; a BUN/creatinine ratio above 20:1 suggests prerenal azotemia, and creatinine clearance estimates the glomerular filtration rate. The urine albumin-to-creatinine ratio screens for early diabetic glomerular damage, with the creatinine correction compensating for urine dilution.

2.2 Enzymes, Cardiac & Liver Markers

Enzyme and protein markers localize organ injury. Troponin is the cardiac-specific marker for acute myocardial injury — a rising-and-falling pattern over serial draws is diagnostic. Lipase is the most specific enzyme for acute pancreatitis.

For the liver, an elevated direct (conjugated) bilirubin with high alkaline phosphatase and dark urine points to obstructive (post-hepatic) jaundice, while an isolated high alkaline phosphatase with a normal GGT in a growing adolescent is usually of bone origin.

2.3 Glucose, Lipids & Endocrine

Glucose is measured by the hexokinase reference method, in which glucose-6-phosphate dehydrogenase generates the measured NADPH. Hemoglobin A1c reflects average glucose over two to three months.

For lipids, the Friedewald equation estimates LDL as total cholesterol minus HDL minus triglycerides divided by five, and becomes unreliable when triglycerides are very high. Endocrine testing is pattern-based: a high TSH with a low free T4 indicates primary hypothyroidism.

Module 3 · Hematology & Coagulation

Two content categories — Hematology (about 13%) and Coagulation & Hemostasis (about 7%). Hematology covers the complete blood count, red-cell indices, anemias, and the morphology that points to leukemias and other disorders; coagulation covers the bleeding-and-clotting tests and what they reveal.

3.1 The CBC, Indices & Anemias

Automated counters use the impedance (Coulter) principle— a cell passing through an aperture changes electrical resistance. The Mean corpuscular volume (MCV) is the first sort for anemia, and the Red cell distribution width (RDW) measures size variation. Among the indices, Ferritin is the key discriminator: low in iron deficiency, normal or high in anemia of chronic disease and thalassemia trait.

The Reticulocyte count, made visible by new methylene blue staining, shows whether the marrow is responding appropriately. A high count fits hemolysis or blood loss; a low count in an anemic patient fits inadequate production.

3.2 Morphology, Leukemias & Inclusions

Red-cell morphology and inclusions are pattern-recognition gold. Know the high-yield links: Howell-Jolly bodies with asplenia; Heinz bodies with G6PD deficiency after oxidative stress; basophilic stippling with lead poisoning; target cells with liver disease and hemoglobinopathies; schistocytes with microangiopathic hemolysis; and tear-drop cells with myelofibrosis. On the white-cell side, Auer rods mark a myeloid lineage (acute myeloid leukemia), smudge cells accompany chronic lymphocytic leukemia, and toxic granulation with Döhle bodies and a left shift signals severe bacterial infection.

3.3 Coagulation & Hemostasis

Coagulation is rule-driven. The Prothrombin time (PT) tests the extrinsic and common pathways (sensitive to factor VII) and is reported as the International normalized ratio (INR) to monitor warfarin; the Activated partial thromboplastin time (aPTT) tests the intrinsic and common pathways and monitors unfractionated heparin.^[6]

A Mixing study distinguishes a factor deficiency (corrects) from an inhibitor such as a lupus anticoagulant (does not correct). D-dimer is sensitive but not specific for clot breakdown, and is elevated along with a prolonged PT and PTT, low fibrinogen, and thrombocytopenia in disseminated intravascular coagulation.

Module 4 · Immunology & Serology

One content category — about 9% of the exam. Immunology covers the antibodies and complement system, the immunoassay methods used to detect them, and the infectious and autoimmune serology that applies them clinically.

4.1 Antibodies, Complement & Methods

Know the five immunoglobulin classes cold: IgM is produced first in a primary response and is a strong agglutinator; IgG is the most abundant, dominates the secondary (anamnestic) response, and crosses the placenta; IgA predominates in secretions; IgE mediates type I immediate hypersensitivity; and IgD sits on naive B cells. The Classical complement pathway is triggered when IgG or IgM bound to antigen is recognized by C1q.

On methods, the ELISA uses an enzyme-labeled antibody and a substrate to produce a measurable color, and is the workhorse screening assay. Watch for the Prozone phenomenon: a false-negative agglutination from antibody excess, resolved by diluting the serum.

4.2 Infectious & Autoimmune Serology

Serology applies these principles to diagnosis. A fourfold rise in titer between acute and convalescent sera indicates recent or current infection. For hepatitis B, combine markers: HBsAg = current infection, anti-HBs = immunity, anti-HBc = past or present natural infection — so anti-HBs positive with anti-HBc negative is vaccine-induced immunity.

For HIV, a repeatedly reactive screen is confirmed by an antibody-differentiation (or historically Western blot) assay. On the autoimmune side, the ANA test screens for systemic lupus erythematosus, and rheumatoid factor is an IgM autoantibody against the Fc portion of IgG.

Module 5 · Immunohematology & Blood Banking

Two content categories — Immunohematology (about 10%) and Blood Banking & Transfusion Services (about 6%). This is the highest-stakes area: ABO/Rh typing, antibody detection and compatibility testing, and recognizing and acting on transfusion reactions.

5.1 ABO/Rh, Antiglobulin & Compatibility

ABO testing pairs Forward grouping (testing red cells with anti-A and anti-B) against Reverse grouping (testing serum against A1 and B cells). By Landsteiner's rule, a person has the antibody to the antigen they lack, so the two must agree — a mismatch is an ABO discrepancy.^[6] Group O cells are the universal red-cell donor (O-negative in emergencies); group AB plasma lacks anti-A and anti-B, making AB the universal red-cell recipient.

The antiglobulin (Coombs) tests are central. The Direct antiglobulin test detects antibody or complement already bound to a patient’s cells in vivo (used for transfusion reactions, HDFN, and autoimmune hemolysis), while the Indirect antiglobulin test detects serum antibodies in vitro (used for antibody screening and the crossmatch).

The major crossmatch tests recipient serum against donor red cells. Rh immune globulin (RhIG) prevents anti-D alloimmunization in Rh-negative mothers, given around 28 weeks and after delivery of an Rh-positive infant.

5.2 Transfusion Reactions & Components

Recognizing a transfusion reaction and acting fast is the most testable blood-bank skill. The Acute hemolytic transfusion reaction (ABO-incompatible) is the most immediately fatal — fever, flank pain, hypotension, hemoglobinuria — and demands stopping the transfusion at once, keeping the line open, and a clerical check.

The Febrile nonhemolytic transfusion reaction is the most common and is reduced by leukoreduction. Distinguish TRALI (immune lung injury) from TACO (volume overload), and remember that Hemolytic disease of the newborn is caused by maternal IgG crossing the placenta.

Module 6 · Microbiology

One content category — about 16% of the exam, the second largest. Microbiology rewards a systematic identification approach: stain and morphology, then biochemical and culture tests to name the organism, plus antimicrobial susceptibility testing.

6.1 Staining & Identification

The Gram stain is the first step: Gram-positive organisms stain purple (thick peptidoglycan), Gram-negative pink (thin wall with an outer membrane).^[5] Acid-fast (Ziehl-Neelsen) staining identifies Mycobacterium by its mycolic-acid wall. For Gram-positive cocci, the Catalase test separates staphylococci (positive) from streptococci and enterococci (negative), and the Coagulase test identifies Staphylococcus aureus.

6.2 Media, Susceptibility & Key Organisms

Selective and differential media are exam staples. MacConkey agar differentiates Gram-negative enterics by lactose fermentation — strong fermenters such as E. coli form pink colonies.

Mannitol salt agar selects for staphylococci; modified Thayer-Martin selects for Neisseria gonorrhoeae; TCBS isolates Vibrio. The Kirby-Bauer method measures susceptibility by the diameter of the zone of inhibition compared to standardized breakpoints.

Module 7 · Urinalysis & Body Fluids

One content category — about 8% of the exam. Urinalysis combines physical, chemical, and microscopic examination; body-fluid analysis extends the same skills to cerebrospinal, serous, synovial, and seminal fluids.

7.1 Urinalysis — Chemistry & Microscopy

The reagent strip screens chemically: the protein pad is most sensitive to albumin; glucose uses a glucose oxidase–peroxidase reaction; ketones react mainly with acetoacetate; nitrite suggests Gram-negative bacteria that reduce nitrate; and Leukocyte esterase indicates neutrophils. Microscopy adds the casts and crystals. RBC casts specifically localize bleeding to the glomerulus, while waxy broad casts suggest chronic renal failure.

Crystals are identified by shape and urine pH: Calcium oxalate crystals are envelope-shaped in acidic-to-neutral urine (often normal); triple phosphate forms coffin-lid crystals in alkaline urine; and hexagonal crystals are diagnostic of cystinuria.

7.2 CSF, Serous & Other Body Fluids

Body fluids apply the same logic. In cerebrospinal fluid, bacterial meningitis shows decreased glucose, increased protein, and a neutrophil-predominant high cell count; the cell count is done on the last tube collected.

Serous-fluid analysis separates a transudate (low protein, from systemic causes) from an exudate (high protein, fluid-to-serum protein ratio above 0.5, from local inflammation). Synovial fluid with negatively birefringent needle-shaped crystals indicates gout (monosodium urate), and a milky, triglyceride-rich effusion is chylous.

How to Use This Medical Technologist Study Guide

This guide is built to be worked, not just read. Because the AMT MT exam tests applied laboratory judgment across every section, the most efficient path to a pass is to learn the material and the patterns a generalist technologist recognizes:

• Study by weight. Clinical Chemistry, Microbiology, and Hematology are the heaviest categories — lead there, then build out coagulation, immunology, blood bank, and urinalysis.
• Master the high-yield staples. Westgard QC rules, the order of draw, acid-base interpretation, anemia by MCV, PT/aPTT/INR, ABO/Rh and the antiglobulin tests, transfusion reactions, Gram-positive identification, and urine microscopy recur constantly.
• Think in patterns. Most items show a finding (an inclusion, a serology pattern, a crystal, a reaction) and ask what it means — drill the associations until they are automatic.
• Check off as you go. Use the Study Guide Contents to mark each section done — it raises your exam-readiness score.
• Take every checkpoint. The end-of-module quizzes show exactly which categories need another pass.
• Then prove it. Send your weak area into the flashcards and a practice test, and read every rationale — that is how the knowledge sticks.

Medical Technologist Glossary

The high-yield Medical Technologist terms in one place — hover any dotted term in the guide, or flip the whole deck here as a self-grading flashcard set.

Accuracy

How close a measured value is to the true value.

Activated partial thromboplastin time

aPTT — assesses the intrinsic and common pathways; used to monitor unfractionated heparin.

Acute hemolytic transfusion reaction

An immediate, often fatal reaction from ABO-incompatible red cells causing intravascular hemolysis.

Anion gap

Sodium minus the sum of chloride and bicarbonate; estimates unmeasured anions to classify metabolic acidosis.

Auer rods

Needle-like cytoplasmic inclusions in myeloid blasts, diagnostic of a myeloid lineage (e.g., acute myeloid leukemia).

Beer's law

The principle that absorbance is directly proportional to analyte concentration and the light-path length in spectrophotometry.

Calcium oxalate crystals

Colorless envelope-shaped (octahedral) urine crystals seen in acidic-to-neutral urine; often a normal finding.

Catalase test

A test that separates catalase-positive staphylococci from catalase-negative streptococci and enterococci.

Classical complement pathway

An antibody-dependent complement cascade triggered when IgG or IgM bound to antigen is recognized by C1q.

Coagulase test

A test detecting an enzyme that converts fibrinogen to fibrin; coagulase-positive identifies Staphylococcus aureus.

Coefficient of variation

A measure of precision: the standard deviation divided by the mean, times 100, expressed as a percentage.

Critical value

A result so abnormal it is life-threatening and must be reported immediately to a caregiver with documented read-back.

D-dimer

A fibrin degradation product elevated after clot formation and lysis; sensitive but not specific for thrombosis.

Delta check

A quality check comparing a patient's current result with that same patient's previous result for the same analyte to flag possible errors.

Direct antiglobulin test

DAT (direct Coombs) — detects antibody or complement already bound to a patient's red cells in vivo.

ELISA

Enzyme-linked immunosorbent assay — an enzyme-labeled antibody plus substrate produces a measurable color to detect antigen or antibody.

Febrile nonhemolytic transfusion reaction

A ≥1 °C temperature rise from anti-leukocyte antibodies or cytokines; prevented by leukoreduction; the most common reaction.

Ferritin

The major iron-storage protein and an acute-phase reactant; low in iron deficiency, normal or high in chronic disease.

Forward grouping

ABO testing of a patient's red cells with anti-A and anti-B reagents to detect their A and B antigens.

Friedewald equation

An estimate of LDL cholesterol: total cholesterol minus HDL minus triglycerides divided by five (mg/dL, fasting).

Gram stain

A differential stain classifying bacteria as Gram-positive (purple) or Gram-negative (pink) by cell-wall structure.

Hemoglobin A1c

Glycated hemoglobin reflecting average blood glucose over the prior two to three months, reported as a percentage.

Hemolytic disease of the newborn

HDFN — destruction of fetal red cells by maternal IgG antibodies (classically anti-D) crossing the placenta.

Immunoglobulin

An antibody; the five classes are IgG, IgM, IgA, IgE, and IgD, each with distinct functions.

Indirect antiglobulin test

IAT (indirect Coombs) — detects antibodies in the patient's serum, used for antibody screening and crossmatch.

International normalized ratio

INR — a standardization of the prothrombin time across reagents and labs for monitoring warfarin therapy.

Kirby-Bauer method

Disk-diffusion antimicrobial susceptibility testing; the zone-of-inhibition diameter is compared to standardized breakpoints.

Landsteiner's rule

The principle that a person has the ABO antibody directed against the A or B antigen they lack.

Leukocyte esterase

A urine dipstick reaction indicating white blood cells (neutrophils), supporting urinary tract infection.

Levey-Jennings chart

A quality-control chart plotting daily control values against the established mean and standard-deviation limits to monitor an analytical method over time.

MacConkey agar

A selective and differential medium for Gram-negative enterics; lactose fermenters form pink colonies.

Mean corpuscular volume

The average red-cell volume (MCV); classifies anemia as microcytic, normocytic, or macrocytic.

Mixing study

A test mixing patient and normal plasma to distinguish a factor deficiency (corrects) from an inhibitor (does not correct).

Order of draw

The CLSI-recommended sequence for filling blood tubes during one venipuncture to prevent additive carryover between tubes.

Plasma

The liquid portion of anticoagulated blood; still contains fibrinogen and clotting factors.

Precision

How reproducible repeated measurements of the same sample are.

Prothrombin time

PT — assesses the extrinsic and common coagulation pathways; sensitive to factor VII and used to monitor warfarin (as INR).

Prozone phenomenon

A false-negative agglutination caused by antibody excess relative to antigen; resolved by diluting the serum.

Random error

Unpredictable scatter of control values around the mean that reduces precision, with no consistent direction.

RBC casts

Red-cell casts in urine that specifically localize bleeding to the glomerulus, as in glomerulonephritis.

Red cell distribution width

RDW — a measure of variation in red-cell size (anisocytosis), often paired with MCV.

Reticulocyte

A young red blood cell; the count reflects marrow red-cell production and is raised by new methylene blue staining for counting.

Reverse grouping

ABO testing of a patient's serum against known A1 and B cells to detect their ABO antibodies.

Rh immune globulin

RhIG — anti-D given to Rh-negative mothers to prevent anti-D alloimmunization and hemolytic disease of the newborn.

Serum

The liquid portion of clotted blood; lacks fibrinogen and clotting factors.

Systematic error

A consistent bias (trend or shift) in control values that reduces accuracy, usually from a calibration, reagent, or instrument problem.

TACO

Transfusion-associated circulatory overload — volume overload causing cardiogenic pulmonary edema during transfusion.

TRALI

Transfusion-related acute lung injury — immune, non-cardiogenic pulmonary edema within 6 hours; a leading cause of transfusion death.

Troponin

A cardiac-specific structural protein that rises and falls after myocardial injury; the preferred marker for acute coronary events.

Westgard rules

A set of statistical multirules (e.g., 1-3s, 2-2s, R-4s, 4-1s, 10-x) applied to control data to detect random and systematic error while limiting false rejection.

AMT MT Study Guide FAQ

References

1. 1.American Medical Technologists (AMT). “Medical Technologist (MT) Certification & Examination.” americanmedtech.org. ↑
2. 2.American Medical Technologists (AMT). “Medical Technologist (MT) Examination Content Outline.” americanmedtech.org. ↑
3. 3.Centers for Disease Control and Prevention (CDC). “Quality Control and Quality Assurance in the Laboratory.” cdc.gov. ↑
4. 4.U.S. National Library of Medicine (MedlinePlus). “Laboratory Tests — CBC, Urinalysis, Troponin, and others.” medlineplus.gov. ↑
5. 5.American Society for Microbiology (ASM). “Clinical Microbiology — Identification & Susceptibility Testing.” asm.org. ↑
6. 6.National Center for Biotechnology Information (NCBI Bookshelf, StatPearls). “Transfusion Reactions; Coagulation Tests; Blood Group Systems.” ncbi.nlm.nih.gov. ↑
7. 100.National Center for Biotechnology Information (NCBI Bookshelf, StatPearls). “Phlebotomy — Order of Draw and Tube Additives.” ncbi.nlm.nih.gov, accessed 20 June 2026. ↑
8. 101.Centers for Disease Control and Prevention (CDC). “Nucleic Acid Amplification Tests (NAATs).” cdc.gov, accessed 20 June 2026. ↑
9. 102.U.S. National Library of Medicine (MedlinePlus). “Blood Tests — Serum and Plasma.” medlineplus.gov, accessed 20 June 2026. ↑
10. 103.National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). “The A1C Test and Diabetes.” niddk.nih.gov, accessed 20 June 2026. ↑
11. 104.National Center for Biotechnology Information (NCBI Bookshelf, StatPearls). “Arterial Blood Gas Interpretation.” ncbi.nlm.nih.gov, accessed 20 June 2026. ↑
12. 105.National Center for Biotechnology Information (NCBI Bookshelf, StatPearls). “High Anion Gap Metabolic Acidosis.” ncbi.nlm.nih.gov, accessed 20 June 2026. ↑
13. 106.U.S. National Library of Medicine (MedlinePlus). “Troponin Test.” medlineplus.gov, accessed 20 June 2026. ↑
14. 107.National Heart, Lung, and Blood Institute (NHLBI). “Blood Cholesterol.” nhlbi.nih.gov, accessed 20 June 2026. ↑
15. 108.U.S. National Library of Medicine (MedlinePlus). “Potassium Blood Test.” medlineplus.gov, accessed 20 June 2026. ↑
16. 109.National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). “Anemia of Inflammation or Chronic Disease.” niddk.nih.gov, accessed 20 June 2026. ↑
17. 110.U.S. National Library of Medicine (MedlinePlus). “Reticulocyte Count.” medlineplus.gov, accessed 20 June 2026. ↑
18. 111.National Heart, Lung, and Blood Institute (NHLBI). “Sickle Cell Disease.” nhlbi.nih.gov, accessed 20 June 2026. ↑
19. 112.National Center for Biotechnology Information (NCBI Bookshelf, StatPearls). “Coagulation Tests — PT and aPTT.” ncbi.nlm.nih.gov, accessed 20 June 2026. ↑
20. 113.U.S. National Library of Medicine (MedlinePlus). “Prothrombin Time Test and INR (PT/INR).” medlineplus.gov, accessed 20 June 2026. ↑
21. 114.U.S. National Library of Medicine (MedlinePlus). “D-Dimer Test.” medlineplus.gov, accessed 20 June 2026. ↑
22. 115.National Center for Biotechnology Information (NCBI Bookshelf, StatPearls). “Immunoglobulin Classes and Functions.” ncbi.nlm.nih.gov, accessed 20 June 2026. ↑
23. 116.National Center for Biotechnology Information (NCBI Bookshelf, StatPearls). “Enzyme-Linked Immunosorbent Assay (ELISA).” ncbi.nlm.nih.gov, accessed 20 June 2026. ↑
24. 117.National Center for Biotechnology Information (NCBI Bookshelf, StatPearls). “Complement System.” ncbi.nlm.nih.gov, accessed 20 June 2026. ↑
25. 118.Centers for Disease Control and Prevention (CDC). “Hepatitis B — Interpretation of Serologic Test Results.” cdc.gov, accessed 20 June 2026. ↑
26. 119.National Center for Biotechnology Information (NCBI Bookshelf, StatPearls). “ABO Blood Group System.” ncbi.nlm.nih.gov, accessed 20 June 2026. ↑
27. 120.U.S. National Library of Medicine (MedlinePlus). “Direct Antiglobulin Test (DAT / Coombs Test).” medlineplus.gov, accessed 20 June 2026. ↑
28. 121.U.S. National Library of Medicine (MedlinePlus). “Rh Incompatibility.” medlineplus.gov, accessed 20 June 2026. ↑
29. 122.National Center for Biotechnology Information (NCBI Bookshelf, StatPearls). “Transfusion-Related Acute Lung Injury (TRALI).” ncbi.nlm.nih.gov, accessed 20 June 2026. ↑
30. 123.U.S. National Library of Medicine (MedlinePlus). “Hemolytic Disease of the Newborn.” medlineplus.gov, accessed 20 June 2026. ↑
31. 124.National Center for Biotechnology Information (NCBI Bookshelf, StatPearls). “Gram Staining and Bacterial Identification.” ncbi.nlm.nih.gov, accessed 20 June 2026. ↑
32. 125.U.S. National Library of Medicine (MedlinePlus). “Urinalysis.” medlineplus.gov, accessed 20 June 2026. ↑
33. 126.National Center for Biotechnology Information (NCBI Bookshelf, StatPearls). “Urine Crystals and Their Significance.” ncbi.nlm.nih.gov, accessed 20 June 2026. ↑
34. 127.National Center for Biotechnology Information (NCBI Bookshelf, StatPearls). “Cerebrospinal Fluid Analysis.” ncbi.nlm.nih.gov, accessed 20 June 2026. ↑

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