( ( ( ( Microorganisms and ) viruses ) ( that ( cause ( infectious disease ) ) ) ) ( ( are pathogens ) . ) )
(ROOT (S (NP (NP (NNS Microorganisms) (CC and) (NNS viruses)) (SBAR (WHNP (WDT that)) (S (VP (VBP cause) (NP (JJ infectious) (NN disease)))))) (VP (VBP are) (ADJP (JJ pathogens))) (. .)))
Microorganisms and viruses that cause infectious disease are pathogens .
(ROOT (S (NP (NNS Pathogens)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (JJ disease-causing) (NNS agents))) (, ,) (PP (JJ such) (IN as) (NP (NNS bacteria) (CC and) (NNS viruses))))) (. .)))