<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>A bacterial infection caused by Chlamydia psittaci. Humans are infected by handling sick birds. The Chlamydia cause respiratory infection manifested with fever, malaise, cough, dyspnea, sore throat, photophobia and headaches.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>