Simple categories matching causative:

• microorganism,
• agent,
• organism,
• condition,
• event,
• pathogen,

Members with property causative:

• virus,
• parvovirus,
• legionella,
• parasite,
• change,
• trauma,
• yeast,
• chlamydia,
• diet,
• bacteria,
• rotavirus,
• recurrent_herpes,
• molecular_biologist,
• endometriosis,
• tartar,
• diabetes,
• soy,
• immunosuppressive,
• wheat,
• infectious_pathogen,
• depression,
• delirium,
• cardiovascular_disease,
• klebsiella,
• pest,
• acid,
• unrecognized_pain,
• mycoplasma,
• protozoa,
• parasitic_agent,
• drug,
• egg,
• antihistamine,
• water,
• fungi,
• connective-tissue_disease,
• intestinal_worm,
• shigella,
• technician,
• metabolic_disease,
• hepatitis-b_virus,
• pathogen,
• virologist,
• toxin,
• blood_deficiency,
• filamentous_fungi,
• chemical_carcinogen,
• pneumococcus,
• hemostatic_abnormality,
• exotoxin,
• gonococcus,
• certain_drug,
• noninfectious_cause,
• glaucoma,
• class_relations,
• fungus,
• personality,
• foodstuff,
• viral_agent,
• low_energy,
• neoplasm,
• dapsone,
• tumor,
• antimalarial,
• extreme_myopia,
• group_streptococcus,
• enterobacteria,
• tobacco,
• cigarette_smoke,
• infection,
• adrenal_fatigue,
• colchicine,
• salmonella,
• neuroleptic-drug_therapy,
• endotoxin,
• anxiety,
• gonorrhea,
• bacterium,
• brucella,
• adenovirus,
• candida_infection,
• coxsackievirus,