NOTE: A surveillance case definition is a set of uniform criteria used to define a disease for public health surveillance. Surveillance case definitions enable public health officials to classify and count cases consistently across reporting jurisdictions. Surveillance case definitions are not intended to be used by healthcare providers for making a clinical diagnosis or determining how to meet an individual patient’s health needs.
An illness characterized by fever, chills, headache, photophobia, lower or upper respiratory disease, and myalgia
Probable A clinically compatible illness that is epidemiologically linked to a confirmed case, or with supportive serology (i.e., a psittacosis CF titer of greater than or equal to 32 in one or more serum specimens obtained after onset of symptoms)
A clinically compatible illness that is laboratory confirmed
The serologic findings noted above may also occur as a result of infection with Chlamydia trachomatis or Chlamydia pneumoniae.