Individuals with compromised immune systems are at highest risk, but any individual with increased contact with birds could become infected. Currently there are no known cases of transmission of psittacosis from a bird to a person with HIV, but the potential exists. Then you could be considered at risk and the above information may be applicable. Neonates as well as the fetus during pregnancy are at high risk also. These diseases are transmitted by direct contact with stool and nasal discharges or breathing dried, powdered droppings.
Cockatiels have the highest incidence of psittacosis.