Modifiers matching pathogen:

• out,
• intracellular,
• external,
• harmful,
• diverse,
• persistent,
• enteric,
• transmissible,
• invasive,
• conventional,
• common,
• exogenous,
• airborne,
• sensitive,
• bacterial,
• chronic,
• single,
• causal,
• waterborne,
• nasty,
• serious,
• anaerobic,
• relevant,
• variable,
• parasitic,
• microbial,
• infectious,
• new,
• dangerous,
• intestinal,
• real,
• viral,
• possible,
• major,
• virulent,
• larger,
• related,
• carcinogenic,
• toxic,
• communicable,
• artificial,
• opportunistic,
• systemic,
• significant,
• infective,
• multiple,
• extracellular,
• smaller,
• select,
• important,
• uncommon,
• respiratory,
• complex,
• obligate,
• diarrhoeal,
• viable,
• environmental,
• resistant,
• nosocomial,
• zoonotic,
• atypical,
• detrimental,
• latent,
• gastrointestinal,
• ocular,
• deadly,
• biological,
• macromolecular,
• lethal,
• small,
• unusual,
• minute,
• animal,
• hazardous,
• aquatic,
• ubiquitous,
• electronic,
• undesirable,
• diarrheal,
• perinatal,
• eukaryotic,
• intercellular,
• outside,
• natural,
• organic,
• fecal,
• microscopic,
• urinary,
• rare,
• mutable,
• causative,
• canine,
• potential,
• tiny,
• resident,
• foreign,
• unicellular,
• secondary,
• gi,
• endogenous,
• large,
• pulmonary,
• neurotropic,
• cellular,
• stable,
• hardy,
• contagious,
• pediatric,
• vaginal,

Simple categories matching waterborne:

• virus,
• disease,
• illness,
• solid,
• preservative,
• metal,
• salt,
• chemical,
• waste,
• organism,
• pathogen,
• component,
• biohazard,
• microorganism,
• particle,
• system,
• parasite,
• microbe,
• bacteria,
• agent,
• material,
• contaminant,
• halide,