Guidance indicates that treatment times for Chlamydia psittaci in birds may be:

• A. Shorter than usual
• B. Longer than usual
• C. The same as for other poultry diseases
• D. Not specified

Answer: (A)

The focus here is that how long to treat avian Chlamydia psittaci isn’t a one-size-fits-all rule. Guidance can allow a shorter treatment course if birds respond quickly and there’s evidence they’re no longer shedding the organism. When clinical signs resolve promptly and diagnostic tests show no shedding, continuing therapy beyond that point often doesn’t add value and can heighten risks like antibiotic resistance and residual drug in the environment. So, in such situations, a shorter duration is considered appropriate, balancing effective control with minimizing unnecessary antibiotic exposure. Longer treatment would be more conservative and isn’t the standard default in this guidance, and treating the disease duration the same as other poultry illnesses ignores its unique zoonotic risk and shedding dynamics. Not specifying would miss the practical option that the guidance provides when responses are favorable.