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Fever causing agents

Pyrogens produced by individual

A comma shaped bacteria

A spiral shaped bacteria

Minute particle that is capable of replication but only within living cells

Alteration of virus 'identity' is _________ variation e.g. flu undergoes frequent antigen shifts

Simple organism that lacks the green pigment chlorophyll

Single celled parasitic organisms

___________ have had the greatest effect on controlling infection

______________ subdue pathogen once disease process has started