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- 34βE12
- AB toxins
- Abdominal compartment syndrome
- Aberrant subclavian artery
- Acetic acid bacteria
- Acetobacter
- Acetogen
- Acid-fast
- Acidaminococcus
- Acidophilus milk
- Acinetobacter
- Acinetobacter baumannii
- Acinetobacter calcoaceticus
- Actinobacillus
- Actinobacillus pleuropneumoniae
- Actinobacillus suis
- Actinomyces
- Actinomyces israelii
- Actinomyces viscosus
- Actinoplanes
- Acute disease
- Acute illness
- Adenoma
- Adenomatosis
- Adenoviridae
- Adenovirus
- Adenovirus genome
- Aerococcus
- Aeromonadaceae
- Aeromonas
- Aeromonas caviae
- Aeromonas hydrophila
- Aeromonas salmonicida
- Aeromonas sobria
- Aggregatibacter
- Aggregatibacter actinomycetemcomitans
- Agrobacterium rhizogenes
- Agrobacterium tumefaciens
- Akkermansia
- Akkermansia muciniphila
- Alcohol liver disease
- Alcohol-related liver disease
- Alcoholic liver disease
- Algor mortis
- Alistipes
- Alpha cell hyperplasia
- Alpha toxin
- Alphatorquevirus
- Altered Schaedler flora
- Alteromonas
- Amycolatopsis
- Amyloid
- Amyloid fibrils
- Amyloid plaque
- Amyloid protein
- Anaerococcus
- Anatomical pathology
- Aneurysm
- Animal trypanosomiasis
- Anisakidae
- Anthrax toxin
- Aortic arch syndrome
- Aortocaval compression syndrome
- Aphthovirus
- Apoplexy
- Apotransferrin
- Aquabacterium
- Aquifex
- Aquifex aeolicus
- Arcanobacterium
- Arcobacter
- Arcuate uterus
- Arteritis
- Arthrofibrosis
- Ascaridia
- Ascaridia galli
- Ascaris
- Ascaris lumbricoides
- Atrophy
- Atypia
- Atypical small acinar proliferation
- Autoinoculation
- Avibirnavirus
- Azospirillum
- Azotobacter
- Bacillaceae
- Bacillales
- Bacillus
- Bacillus amyloliquefaciens
- Bacillus cereus
- Bacillus licheniformis
- Bacillus megaterium
- Bacillus mesentericus
- Bacillus mycoides
- Bacillus pumilus
- Bacillus sphaericus
- Bacillus stearothermophilus
- Bacillus subtilis
- Bacillus thuringiensis
- Bacteria
- Bacterial cellulose
- Bacterial disease
- Bacterial infections
- Bacterial lawn
- Bacterial motility
- Bacterial wilt
- Bacteroidaceae
- Bacteroidales
- Bacteroides
- Bacteroides fragilis
- Bacteroides thetaiotaomicron
- Bacteroides vulgatus
- Ballooning degeneration
- Banff Classification
- Bartonella
- Bartonella henselae
- Bartonella quintana
- BASDAI
- Base excess
- BASFI
- Bdellovibrio
- Beck Hopelessness Scale
- Behcet's disease
- Behcet's syndrome
- Benign lymphoepithelial lesion
- Beta-2 transferrin
- Betaarterivirus
- Biological factors
- Biopsy
- Biopsy needle
- Biphasic disease
- Blood chemistry
- Blood urea nitrogen
- Bone biopsy
- Bone decalcification
- Bone marrow biopsy
- Bouin solution
- Bowel infarction
- Bradyrhizobium
- Bradyrhizobium japonicum
- Brain atrophy
- Brain death
- Brain stem death
- Breast biopsy
- Brenneria
- Brevibacterium
- Brevundimonas
- Bronchial challenge test
- Brucella
- Brucella abortus
- Brucella canis
- Bulleidia
- Burkholderia
- Burkholderia cenocepacia
- Burkholderia gladioli
- Burkholderia mallei
- Burkholderia multivorans
- Burkholderia pseudomallei
- Burkholderia vietnamiensis
- Burning mouth syndrome
- Cadavers
- Calcifying odontogenic cyst
- Calcium imaging
- Call-Exner bodies
- CAMP test
- Campylobacter
- Campylobacter coli
- Campylobacter fetus
- Campylobacter jejuni
- Campylobacter rectus
- Campylobacterales
- Candidatus
- Capillary gas chromatography
- Capnocytophaga
- Capnocytophaga canimorsus
- Capnophiles
- Carbohydrate deficient transferrin
- Carbuncle
- Carcinoma in situ
- Cardiac fibrosis
- Cardiobacterium
- Cardiobacterium hominis
- Cardiovirus
- Carney's triad
- Carnoy's solution
- Carrier testing
- Cartwheel pattern
- Case finding
- Cat scratch
- Cat scratch disease
- Cat-scratch disease
- Catabolite repression
- Causes of seizures
- Cell surface markers
- Cellulomonas
- Central chromatolysis
- Central giant-cell granuloma
- Centrifugation
- Cerebral atrophy
- Cestoda
- Cestodes
- Charcot-Leyden crystals
- Child Sexual Abuse Accommodation Syndrome
- Chlorovirus
- Cholesterol-dependent cytolysin
- Cholesterolosis
- Chromatolysis
- Chromobacterium violaceum
- Chromosome painting
- Chronic
- Chronic diseases
- Chronic disorder
- Chronic infection
- Chronic sclerosing sialadenitis
- Chronicity
- Chryseobacterium
- Chryseobacterium indologenes
- Circulating tumor cells
- Classic galactosemia
- Clinical biochemistry
- Clinical laboratory
- Clinical microbiology
- Clinical pathology
- Clinical virology
- Clostridioides
- Clostridium
- Clostridium baratii
- Clostridium bifermentans
- Clostridium botulinum
- Clostridium butyricum
- Clostridium chauvoei
- Clostridium difficile
- Clostridium difficile toxin B
- Clostridium histolyticum
- Clostridium innocuum
- Clostridium novyi
- Clostridium perfringens
- Clostridium septicum
- Clostridium sporogenes
- Clostridium tertium
- Clostridium tetani
- Clumping factor A
- Cluster of differentiation
- Clusters of differentiation
- CMV
- Coagulase negative staphylococci
- Coagulase negative staphylococcus
- Coagulase positive staphylococci
- Cocci
- Coccidia
- Coccobacillus
- Coliform bacteria
- Coliform bacterium
- Colwellia
- Comamonas
- Comorbid
- Comorbidities
- Comorbidity
- Compartment syndrome
- Component causes
- Connective tissue disease
- Connective tissue diseases
- Continuous fever
- Contraction band necrosis
- Cooling bath
- Core needle biopsy
- Cortical dysplasia
- Corynebacteriaceae
- Corynebacterium amycolatum
- Corynebacterium jeikeium
- Corynebacterium ulcerans
- Coxsackie virus and adenovirus receptor
- Craniocervical instability
- Creatine kinase
- Crest syndrome
- Cronobacter
- Cronobacter sakazakii
- Cry1Ac
- Cryptosporidium hominis
- Cryptosporidium muris
- Cryptosporidium parvum
- Cupriavidus
- Cupriavidus metallidurans
- Cupriavidus necator
- Cutaneous vasculitis
- Cyclospora cayetanensis
- Cysticerci
- Cystoisospora belli
- Cysts
- Cytomegalovirus
- Cytomegalovirus infection
- Cytopathic effect
- Cytopathogenic effect
- Cytopathologist
- Cytopathology
- Cytophaga
- Cytotechnologists
- D-dimer
- Dactylosporangium
- Decalcification
- Deficiency
- Degenerative diseases
- Deinococcus
- Delftia
- Deltacoronavirus
- Denitrifying bacteria
- Density gradient centrifugation
- Dermatomyositis
- Dermatopathology
- Desquamative interstitial pneumonia
- Desulfovibrio
- Diagnosis
- Diagnostic
- Diagnostic agent
- Diagnostic tests
- Dialister
- Diastasis
- Diff-Quik
- Differential staining
- Diffuse alveolar damage
- Digital pathology
- Diphyllobothrium
- Diphyllobothrium latum
- Diplococcus
- Direct fluorescent antibody
- Direct immunofluorescence
- Disease mongering
- Disease resistance
- Diseases of affluence
- Diseases of poverty
- Dissecting aneurysm
- Disseminated cancer
- Disseminated disease
- Dix-Hallpike test
- Dohle bodies
- Drug fever
- Dying
- Dystrophic calcification
- Echinococcus granulosus
- Echinococcus multilocularis
- Edwardsiella
- Edwardsiella tarda
- Eggs per gram
- Eikenella
- Eikenella corrodens
- Eimeria acervulina
- Eimeria tenella
- Electric cell-substrate impedance sensing
- Electron microscope
- Electron microscopy
- Elizabethkingia
- Elizabethkingia meningoseptica
- Emperipolesis
- Endomyocardial biopsy
- Enterobacter
- Enterobacter aerogenes
- Enterobacter cloacae
- Enterobacterales
- Enterobacteriaceae
- Enterobacteriales
- Enterococcus
- Environmental Dependency Syndrome
- Environmental disease
- Environmental factors
- Enzyme activity
- Eosinophilia myalgia syndrome
- Eosinophilia-myalgia syndrome
- Eosinophilic
- Epididymal cysts
- Epifluorescence microscopy
- Epithelial dysplasia
- Epsilonproteobacteria
- Epstein Barr virus
- Error Catastrophe
- Erwinia
- Erwinia amylovora
- Escherichia
- Ethanol precipitation
- Etiology
- Eubacteria
- EuroSCORE
- Exfoliatin
- Faecalibacterium
- False aneurysm
- Fat necrosis
- Feathery degeneration
- Fecal immunochemical test
- Fever
- Fibrous ankylosis
- Field flow fractionation
- Fine needle aspiration
- Finegoldia
- FISH
- Flail limb
- Flavobacterium
- Flow cytometry
- Fluid deprivation test
- Fluorescence activated cell sorting
- Fluorescence imaging
- Fluorescence microscopy
- Forensic medicine
- Forensic pathologists
- Forme fruste
- Francisella
- FRAX
- Frey's syndrome
- Fructose malabsorption
- Functional disorder
- Fusarium subglutinans
- Fusobacterium necrophorum
- Fusobacterium nucleatum
- Galactosemia
- Gamma glutamyl transpeptidase
- Gamma-glutamyltransferase
- Gammacoronavirus
- Gas chromatography
- Gas liquid chromatography
- Gastrointestinal pathology
- Gemella
- Gemistocytes
- Generalized lymphadenopathy
- Genetic resistance
- Geobacter
- Geobacter sulfurreducens
- Giardia
- Giemsa stain
- Glandular metaplasia
- Glossodynia
- Gluconobacter
- Gluten challenge
- Gonococcal conjunctivitis
- Gradenigo's syndrome
- Gram negative anaerobic cocci
- Gram negative bacteria
- Gram positive bacteria
- Gram positive cocci
- Granulation
- Granulation tissue
- Granulomas
- Granulomatous inflammation
- Gulf War Syndrome
- H antigen
- H&E stain
- Haemophilus ducreyi
- Haemophilus influenzae
- Haemophilus influenzae type b vaccine
- Hafnia alvei
- Halomonas
- Harvard step test
- Helicobacter
- Helicobacter felis
- Helicobacter hepaticus
- Helicobacter muridarum
- Helicobacteraceae
- Hematomas
- Hemolytic streptococcus
- Hemophagocytosis
- Hepacivirus
- Hereditary fructose intolerance
- Hereditary neuralgic amyotrophy
- Heterogeneous condition
- Heteroresistance
- Hib vaccine
- High resolution manometry
- High-resolution manometry
- Histochemistry
- Histopathology
- HMB 45
- Homogenization
- Human herpesvirus 4
- Human herpesvirus 6
- Human herpesvirus 7
- Hyaline
- Hymenolepis
- Hymenolepis diminuta
- Hymenolepis nana
- Hyperostosis
- Hyperplasia
- Hyperpyrexia
- Hypoplasia
- Hypotrophy
- ID50
- Idiopathic inflammatory myopathies
- Ifi202
- Immunofluorescence
- Immunohistochemistry
- Immunomagnetic separation
- Immunopathology
- Immunoperoxidase
- In vitro
- Inclusion body myositis
- Infarction
- Infectious dose
- Inflammatory myopathy
- Inflammatory pseudotumor
- Integrated pest management
- Intraepithelial neoplasia
- Ion-exchange membranes
- Isolation chip
- Isotope dilution
- Isotopic labeling
- Kidney biopsy
- Kikuchi disease
- Kingella
- Kingella kingae
- Klebsiella
- Klebsiella aerogenes
- Klebsiella oxytoca
- Klebsiella pneumoniae
- Kluyvera
- KOH test
- Kufor-Rakeb syndrome
- Kytococcus sedentarius
- L ring
- Laboratory automation
- Lactobacillus
- Lactobacillus acidophilus
- Lactobacillus helveticus
- Lactobacillus iners
- Lactobacillus jensenii
- Lactobacillus johnsonii
- Lactobacillus paracasei
- Lactobacillus plantarum
- Leaf spot
- Legionella
- Lesions
- Leuconostoc
- Leucyl aminopeptidase
- Leukocidin
- Leukocytoclastic vasculitis
- Lipophilic bacteria
- Liquefactive necrosis
- Liquid biopsy
- Liquid-based cytology
- Liquid-liquid extraction
- Listeria
- Listeriaceae
- Listeriolysin O
- Livor mortis
- Low anterior hairline
- Lung biopsy
- Lung microbiota
- Lupus
- Lymph node biopsy
- Lymphadenitis
- Lymphadenopathy
- Lymphocele
- Lymphocryptovirus
- Lymphoepithelial lesion
- Lysis buffer
- Lyssavirus
- Macrophomina phaseolina
- Macroprolactin
- Magic syndrome
- Magnetospirillum
- Magnetotactic bacteria
- Mallory bodies
- Mammarenavirus
- Marinobacter
- Mass cytometry
- Mass spectrometer
- Mass spectrometry
- Mass spectroscopy
- Mass spectrum
- Mastadenovirus
- Mastrevirus
- Mechanism of autism
- Mechanomyogram
- Medical examiner
- Medical tests
- Megamonas
- Megasphaera
- Merodiploid
- Merozoite surface protein
- Mesenteric cyst
- Metacestode
- Metaplasia
- Metapneumovirus
- Metastatic calcification
- Microaneurysms
- Microangiopathy
- Microbacterium
- Microbial pathogenesis
- Microbiome
- Microcin
- Microcytic anemia
- Micromonospora
- Micromonospora echinospora
- Microscopic polyangiitis
- Microtriches
- Mimivirus
- Mixed connective tissue disease
- Mobiluncus
- Mogibacterium
- Molecular pathology
- Moraxella
- Moraxella catarrhalis
- Morganella morganii
- Morse Fall Scale
- Morton's neuroma
- Most probable number
- MRSE
- Mulder's sign
- Multimorbidity
- Multiple electrode aggregometry
- Multiplexing
- Muscle biopsy
- Mycobacteria
- Mycobacterium
- Mycobacterium abscessus
- Mycobacterium africanum
- Mycobacterium avium
- Mycobacterium avium complex
- Mycobacterium fortuitum
- Mycobacterium gordonae
- Mycobacterium haemophilum
- Mycobacterium intracellulare
- Mycobacterium kansasii
- Mycobacterium malmoense
- Mycobacterium scrofulaceum
- Mycobacterium smegmatis
- Mycobacterium tuberculosis
- Mycobacterium ulcerans
- Mycobacterium xenopi
- Mycobiome
- Mycobiota
- Mycoplasma
- Mycoplasma fermentans
- Mycoplasma genitalium
- Mycoplasma hominis
- Mycoplasma hyopneumoniae
- Mycoplasma penetrans
- Mycoplasma pneumoniae
- Myxococcus
- Nanopore sequencing
- Narrow face
- Nasopharyngeal swab
- Necrotizing sialometaplasia
- Needle biopsy
- Negri bodies
- Neisseria
- Neisseria lactamica
- Neisseria meningitidis
- Neisseria mucosa
- Neointimal hyperplasia
- Neospora caninum
- Nephrogenic systemic fibrosis
- Nerve biopsy
- Neuritic plaques
- Neuroectodermal neoplasm
- Neuropathology
- Nitrosomonas
- Nocardia
- Nodular sclerosis
- Non communicable diseases
- Non-communicable diseases
- Non-infectious diseases
- Nontuberculous mycobacteria
- Nosology
- Novosphingobium
- Nuclear atypia
- Odontogenic tumors
- Open biopsy
- Optimal virulence
- Orcein
- Orthohepevirus
- Orthonairovirus
- Orthoreovirus
- Osteoblastoma
- Osteoid osteoma
- Osteolytic lesion
- Ovarian cysts
- Owl's eye appearance
- Oxford-AstraZeneca COVID-19 vaccine
- Paenibacillus polymyxa
- Pain disorder
- Pannus
- Pantoea
- Pantoea agglomerans
- Panton-Valentine leukocidin
- Pap smear
- Papanicolaou stain
- Papanicolaou test
- Parabacteroides
- Paraburkholderia
- Paracoccus
- Paracoccus denitrificans
- Parascaris
- Parasite load
- Parasitemia
- Parasitoids
- Parasitology
- Parotitis
- Parsonage-Turner syndrome
- Parvimonas micra
- Pasteurella
- Pasteurellaceae
- Pathobiont
- Pathogenesis
- Pathologic processes
- Pathologists
- Pathology
- Pathophysiology
- Pathophysiology of obesity
- Pathovar
- Pectobacterium
- Pediococcus
- Pegivirus
- Peliosis hepatis
- Pelomonas
- Penicillium
- Penicillium chrysogenum
- Penicillium citrinum
- Penicillium commune
- Penicillium digitatum
- Penicillium expansum
- Penicillium funiculosum
- Penicillium griseofulvum
- Penicillium roqueforti
- Peptoniphilus
- Peptostreptococcus anaerobius
- Periapical cyst
- Pericardial cyst
- Perineural invasion
- Peritoneal washing
- Perls Prussian blue
- Persistent generalized lymphadenopathy
- Pestivirus
- PFAPA
- Phase variation
- Phenol-soluble modulin
- Phlebovirus
- Photobacterium
- Photobacterium phosphoreum
- Photoglottography
- Photorhabdus luminescens
- Pilar cysts
- Planococcus
- Plant pathogen
- Plaque assay
- Plasma cell granuloma
- Pneumatosis
- Pneumolysin
- Pneumovirus
- Point of care testing
- Point-of-care testing
- Polyarteritis nodosa
- Polymyalgia rheumatica
- Polymyositis
- Polyol pathway
- Polysaccharide A
- Pontiac fever
- Porphyromonadaceae
- Porphyromonas
- Post mortem interval
- Post-intensive care syndrome
- Post-vasectomy pain syndrome
- Postcoital test
- Potyvirus
- Precancer
- Predictive value
- Prevotella
- Prevotella melaninogenica
- Prevotellaceae
- Progressive disease
- Progressive systemic sclerosis
- Prolapse
- Propofol infusion syndrome
- Prostate biopsy
- Proteobacteria
- Proteus
- Proteus mirabilis
- Proteus penneri
- Providencia
- Providencia stuartii
- Psammoma body
- Pseudo-Cushing's syndrome
- Pseudoaneurysms
- Pseudocysts
- Pseudomonas
- Pseudomonas putida
- Pseudomonas stutzeri
- Psoriasis Area and Severity Index
- Punch biopsy
- Pyrogen
- Pyruvate kinase deficiency
- Pythiosis
- Pythium
- Pythium insidiosum
- Radicular cyst
- Ralstonia
- Ralstonia pickettii
- Ralstonia solanacearum
- Ranula
- Raoultella
- Rapid diagnostic test
- Rapid strep test
- Reactive arthritis
- Recrudescence
- Rectal thermometry
- Reed-Sternberg cells
- Reference range
- Reiter's syndrome
- Relapsing polychondritis
- Relapsing-remitting
- Relative energy deficiency in sport
- Remittent fever
- Renal biopsy
- Renpenning syndrome
- Renpenning's syndrome
- Respirovirus
- Retrospective diagnosis
- Reverse transcription polymerase chain reaction
- Reversible cerebral vasoconstriction syndrome
- Rheumatoid nodules
- Rheumatoid nodulosis
- Rhizobacteria
- Rhizobium
- Rhizopus arrhizus
- Rhizopus microsporus
- Rhizosphere
- Rhodococcus equi
- Richmond Agitation Sedation Scale
- Rickettsia
- Rigor mortis
- Rikenellaceae
- Roseobacter
- Roseolovirus
- Rostellum
- Rothia dentocariosa
- Rotor syndrome
- Rubivirus
- Ruminococcaceae
- Ruminococcus
- Russell bodies
- Salinispora
- Salinispora tropica
- Salivary gland diseases
- Salmonella
- Salmonella bongori
- Salmonella enterica
- Salt-and-pepper chromatin
- Salting out
- Sapovirus
- Sarcina
- Sarcocystis neurona
- Savant
- Schiller's test
- Scleredema
- Scolex
- Screening
- Seadornavirus
- Sedimentation coefficient
- Segmented filamentous bacteria
- Selenomonad
- Selenomonas sputigena
- Self-limiting
- Senile plaques
- Septate uterus
- Serial dilution
- Seroma
- Serratia
- Serratia liquefaciens
- Serratia marcescens
- Serum ascites albumin gradient
- Serum chloride
- Shave biopsy
- Shewanella
- Shewanella putrefaciens
- Shiga toxin
- Shigella
- Shigella boydii
- Shigella dysenteriae
- Shigella flexneri
- Shigella sonnei
- Short rib–polydactyly syndrome
- Sialocele
- Sialolithiasis
- Signet ring cell
- Single-particle tracking
- Sjogren's syndrome
- Skeletonization
- Skin biopsy
- SLE
- Slime layer
- SLITRK1
- Sloping forehead
- Solid phase microextraction
- Solid-phase microextraction
- Solvent extraction
- Sorangium cellulosum
- Sotos syndrome
- Sphaerotilus natans
- Spheroplasts
- Sphingobium
- Sphingomonas elodea
- Spin trapping
- Spiral bacteria
- Spirochaeta
- Sporosarcina
- Sputnik V
- Sputum culture
- Squamous metaplasia
- Staphylococcal food poisoning
- Staphylococcus
- Staphylococcus aureus
- Staphylococcus epidermidis
- Staphylococcus haemolyticus
- Staphylococcus hominis
- Staphylococcus lugdunensis
- Staphylococcus saprophyticus
- Staphylococcus simulans
- Staphylokinase
- Steatosis
- Stenosis
- Stenotrophomonas
- Stenotrophomonas maltophilia
- Stereotactic device
- Stereotactic surgery
- Sterile insect technique
- Stool sample
- Storiform pattern
- Streptococcal pyrogenic exotoxin
- Streptococcus
- Streptococcus bovis
- Streptococcus canis
- Streptococcus gallolyticus
- Streptococcus iniae
- Streptococcus pneumonia
- Streptococcus pneumoniae
- Streptococcus pyogenes
- Streptococcus salivarius
- Streptococcus sanguinis
- Streptolysin
- Streptolysin O
- Streptomyces
- Streptomyces achromogenes
- Streptomyces albus
- Streptomyces antibioticus
- Streptomyces avermitilis
- Streptomyces avidinii
- Streptomyces caespitosus
- Streptomyces cattleya
- Streptomyces clavuligerus
- Streptomyces fradiae
- Streptomyces griseus
- Streptomyces hygroscopicus
- Streptomyces niveus
- Streptomyces nodosus
- Streptomyces peucetius
- Streptomyces pilosus
- Streptomyces rimosus
- Streptomyces toxytricini
- Streptomyces venezuelae
- Streptomyces verticillus
- Streptomycetes
- Strictures
- Subacute combined degeneration of spinal cord
- Sucrose intolerance
- Sudden arrhythmic death syndrome
- Sulfate reducing bacteria
- Sulfurovum
- Swelling capacity
- Sylvatic cycle
- Syndrome
- Synechocystis
- Syringobulbia
- Systemic acquired resistance
- Systemic disease
- Systemic scleroderma
- Systemic sclerosis
- Tabes dorsalis
- Taenia asiatica
- Taenia crassiceps
- Taeniidae
- Takayasu's arteritis
- Talaromyces marneffei
- Tapeworm
- Tapeworms
- Thermotoga
- Thermotoga maritima
- Thermus
- Thermus aquaticus
- Thoracentesis
- Thoracocentesis
- Thrombotic microangiopathies
- Thrombotic microangiopathy
- Tissue typing
- Tophi
- Tophus
- Torovirus
- Torque teno virus
- Toxic oil syndrome
- Toxic shock syndrome
- Toxocara canis
- Toxocara cati
- Toxoplasma gondii
- Tracheal cytotoxin
- Transferrin
- Transketolase
- Transovarial transmission
- Transperineal biopsy
- Transstadial transmission
- Transurethral biopsy
- Trichilemmal cyst
- Trichomonas
- Trichomonas tenax
- Trichuris suis
- Triple X syndrome
- Trisomy X
- Tropheryma whipplei
- Trophozoites
- Tropical splenomegaly syndrome
- True negative
- Truenat
- Trueperella
- Tuberculous lymphadenitis
- Turicibacter
- Twitching motility
- Tzanck smear
- Tzanck test
- Underdevelopment
- Undifferentiated connective tissue disease
- Unicornuate uterus
- Upper motor neuron syndrome
- Urachal cyst
- Ureaplasma
- Uterine septum
- Varicellovirus
- Variovorax
- Veillonella
- Vein of Galen aneurysmal malformations
- vein of Galen malformation
- Ventriculomegaly
- Vertebral hemangioma
- Vesiculovirus
- Viable but nonculturable
- Vibrio
- Vibrio alginolyticus
- Vibrio anguillarum
- Vibrio cholerae
- Vibrio fischeri
- Vibrio harveyi
- Vibrio mimicus
- Vibrio parahaemolyticus
- Vibrionaceae
- Vibriosis
- Virgibacillus
- Virus isolation
- VRSA
- Weissella
- Wells score
- Wild-type transthyretin amyloid
- Wolbachia
- Wolfram syndrome
- Wolinella
- Work-related musculoskeletal disorders
- Xanthomonas
- Xanthomonas campestris
- Xanthomonas oryzae
- Xenorhabdus
- Yergason's test
- Yersinia enterocolitica
- Ziehl-Neelsen stain