| Acantamoeba | Acantamoeba |
| Actinomyces | Actinomyces |
| Acute diarree | Gastro-enteritis, acute diarree |
| Acute doofheid | Oren, acute doofheid |
| Adenovirus | Adenovirus |
| Aeromonas / Plesiomonas | Gastro-enteritis, acute diarree |
| Afrikaanse slaapziekte | Trypanosoma brucei |
| Afwijkend bloedbeeld | Afwijkend bloedbeeld |
| AIDS | SOA, HIV |
| Algemene kweek (banale kweek) | Algemene kweek (banale kweek) |
| Amoeben | Gastro-enteritis, chronische diarree |
| Anaërobe micro-organismen | Anaërobe micro-organismen |
| Antistreptolysine-O | Hemolytische streptokokken |
| Arbovirussen | Arbovirussen |
| Artritis | Artritis |
| Ascaris (inclusief Toxocara) | Ascaris (inclusief Toxocara) |
| Aspergillus | Aspergillus |
| AST | Hemolytische streptokokken |
| Atypische pneumonie | Luchtwegen |
| Babesiose | Babesia |
| Bang, ziekte van | Brucella |
| Bartonella henselae (kattenkrabziekte) | Bartonella henselae |
| Bartonella quintana | Bartonella quintana |
| Bellse parese | Facialis parese |
| Bilharzia | Schistosoma |
| BK-virus | BK-virus |
| Blaasjes | Huid en weke delen, blaasjes |
| Bloedkweek | Algemene kweek, bloedkweek |
| Boerenlong | Micropolyspora faeni |
| Bof | Bofvirus |
| Bofvirus | Bofvirus |
| Bordetella pertussis | Bordetella pertussis |
| Bornholm, ziekte van | Luchtwegen, pleuritis |
| Borrelia burgdorferi (Lyme) | Borrelia burgdorferi |
| Botulisme | Clostridium botulinum |
| Brucella | Brucella |
| Calicivirus | Norovirus |
| Campylobacter | Campylobacter |
| Candida species | Schimmels / gisten |
| Cardiomyopathie | Hart en spieren; myocarditis / pericarditis |
| Cervixdiagnostiek | Algemene kweek, fluordiagnostiek |
| Chagas, Ziekte van | Trypanosoma cruzi |
| Chikungunya | Chikungunyavirus |
| Chlamydia | SOA, Chlamydia |
| Chlamydia pneumoniae | Luchtwegen, atypisch |
| Chlamydia psittaci | Luchtwegen, atypisch |
| Chlamydia trachomatis | Chlamydia trachomatis |
| Chlamydophila pneumoniae | Luchtwegen, atypisch |
| Chlamydophila psittaci | Luchtwegen, atypisch |
| Cholera | Gastro-enteritis, acute diarree |
| Chronische diarree | Gastro-enteritis, chronische diarree |
| Clostridium botulinum | Clostridium botulinum |
| Clostridium difficile | Gastro-enteritis, acute diarree |
| Clostridium difficile toxine | Gastro-enteritis, acute diarree |
| Clostridium tetani | Clostridium tetani |
| Coccidioides | Coccidioides |
| Congovirus | Hemorrhagische koorts virussen |
| Conjunctivitis | Ogen, conjunctivitis |
| Coronavirus | Coronavirus |
| Corynebacterium diphteriae | Corynebacterium diphteriae |
| Coxiella burnetii (Q-koorts) | Coxiella burnetii |
| Coxsackievirus | Enterovirus |
| Cryptokokken | Cryptokokken |
| Cryptosporidium parvum/hominis | Gastro-enteritis, chronische diarree |
| Cysten | Gastro-enteritis, chronische diarree |
| Cystitis | Urinewegen |
| Cytomegalovirus (CMV) | Cytomegalovirus (CMV) |
| Darminfectie | Gastro-enteritis |
| Denguevirus | Denguevirus |
| Dermatofieten | Schimmels / gisten |
| Dialysescreening | Dialysescreening |
| Diarree | Gastro-enteritis |
| Dientamoeba fragilis | Gastro-enteritis, chronische diarree |
| Difterie | Corynebacterium diphteriae |
| DNase-B, anti- | Hemolytische streptokokken |
| Doofheid, acute | Oren, acute doofheid |
| Duivenmelkerskoorts | Duivenmelkerskoorts |
| E. coli O157 | Gastro-enteritis, acute diarree |
| Ebolavirus | Hemorrhagische koorts virussen |
| Echinococcus | Echinococcus |
| ECHOvirus | Enterovirus |
| Ehrlichia | Ehrlichia |
| Encefalitis | Meningitis / Encefalitis |
| Endocarditis | Hart en spieren, endocarditis |
| Entamoeba histolytica (amoeben) | Gastro-enteritis, chronische diarree |
| Enterobius vermicularis | Gastro-enteritis, aarsmaden |
| Enterovirus | Enterovirus |
| Epstein Barr virus (EBV) | Epstein Barr virus (EBV) |
| Erythema infectiosum | Huid en weke delen, erythema infectiosum |
| Erythema migrans | Huid en weke delen, erythema migrans |
| Erythema multiforme | Huid en weke delen, erythema multiforme |
| Erythema nodosum | Huid en weke delen, erythema nodosum |
| Europese teken encephalitis | Tick borne encephalitis virus |
| Exantheem | Huid en weke delen, exantheem |
| Exanthema subitum (6e ziekte) | Humaan herpes virus type 6 |
| Facialis parese | Facialis parese |
| Farmerslung | Micropolyspora faeni |
| Fasciola | Fasciola |
| Feceskweek | Algemene kweek, feceskweek |
| Fitz Hugh Curtis Syndroom | Fitz Hugh Curtis Syndroom (perihepatitis) |