1) Able to cause disease 2) Catchy 3) Infectious 4) Morbific 5) Pathogenic 6) Unhealthful 1) Infectious 2) Morbific 3) Pathogenic 4) Septic 
Of an agent of inoculation, capable of transmitting inoculum. 
• (a.) Infectious.
Capable of transmitting an infection. ... Synonym: infectious. ... (05 Mar 2000) ... 
(in-fek´tiv) capable of producing infection. infectious (def. 1).
An organism or part thereof capable of establishing a pathogenic relationship with a host i.e. capable of transmitting inoculum.
In·fect'ive adjective [ Latin infectivus pertaining to dyeing.] Infectious. Beau. & Fl. « True love . . . hath an infective power.» Sir P. Sidney. 
Type: Term Pronunciation: in-fek′tiv Definitions: 1. Capable of transmitting an infection. Synonyms: infectious2
[adj] - able to cause disease
morbific adjective able to cause disease; `infective agents`; `pathogenic bacteria`
infectious.