The man identified as Kennedy Swamy, who was working as a nurse at a Melbourne youth mental health centre, had sex with a patient suffering from the bipolar disorder in Mar 2009, reported an Australian news agency.
"You breached the trust placed in you as a carer of a vulnerable person who was in a fragile state," Judge Wilmoth, who found Swamy guilty, is quoted as saying in AAP report.
Swamy was 28 when he approached the teenage patient and suggested that they had sex. After indulging in intercourse twice in the bathroom, the girl felt that it was not right and spoke about the sexual activity in her therapy session.
The bipolar disorder is characterised by manic-depressive mood swings. The illness affects the decision-making ability, the judge reportedly noted before pronouncing the judgment.
Swamy, who also pleaded guilty, was sentenced to jail in the Victorian County Court on Thursday, Apr 8. He can apply for parole after serving a jail term of 15 months.