Pt has hx of MRSA infection in this wound. .
 The patient had an infected wound. 
(ROOT (S (NP (NN Pt)) (VP (VBZ has) (NP (NP (NN hx)) (PP (IN of) (NP (NN MRSA) (NN infection)))) (PP (IN in) (NP (DT this) (NN wound)))) (. .) (. .)))
(ROOT (S (NP (DT The) (NN patient)) (VP (VBD had) (NP (DT an) (JJ infected) (NN wound))) (. .)))
( Pt ( ( ( ( has ( hx ( of ( MRSA infection ) ) ) ) ( in ( this wound ) ) ) . ) . ) )
( ( The patient ) ( ( had ( an ( infected wound ) ) ) . ) )