Avian chlamydiosis (Ornithosis), is one of the most important neglected diseases in ducks that has a critical zoonotic potential and considered as a public health risk. Chlamydiosis is mostly responsible for poor laying performance and causes severe lesions in multiple organs of ducks. The main causative agent of avian chlamydiosis is considered to be Chlamydia C. psittaci, however, other chlamydial species were found to infect ducks as well, such as C. gallinacea. In this study, we discuss the incidence of avian chlamydiosis in different aged ducks. One hundred and twenty fecal swabs were collected, purified and injected into embryonating chicken eggs via the yolk sac method and the results were detected by the Gimenez stain. Chlamydial inclusion bodies appeared as bright red cytoplasmic inclusions. Out of the 120 samples, 74 (61.6 %) were found to be positive and 46 (38.3 %) were negative. This high percentage of infected ducks indicate that ducks may be a highly mobile vector for chlamydial species, posing zoonotic hazard and of economic importance.