Infectious Coryza

[GreenScoopFarms]

My healthy beautiful chickens of 2 years have been hit with Coryza. Only reason I know I have lost 3 and had two of three tested. I have found little to no help and the drugs that Vet placed my chickens on 3 days before 1st death are not working. Where do I go from here? My whole flock of 30 birds have been infected and i almost positive this came from a rooster that I STUPIDLY not knowing better brought into my flock 3 days before first signs of symptoms. Will I be able to intergrade new chics I have under heat lamps now?

 

[nuthatched]

I personally would not at new birds quite yet, I'm not sure what to do but I don't think adding more will make it easier.

 

[dawg53]

It would be best to cull your flock since surviving birds will be carriers for life. Stress will bring out symptoms again requiring treatment. Then disinfect everything and you should be able to repopulate in couple of months.
A sulfa drug in combination with an antibiotic such as Tylan or Baytril will treat Coryza. Again, survivors will be carriers.
I'm sorry you're going through this.
Here's a link: Scroll down to Infectious Coryza;
https://edis.ifas.ufl.edu/publication/PS044