Infectious Coryza
Good day every one, my farm is having serious problem with coryza. I collect point of lay from another farm. That was how it got into my farm, I did treatment with sufla and oxytra but the sickness left and resurface, it affected the the birds that some of them stop growing. I had to sell them and disinfect my farm. And collect new pullet. After three weeks I notice the new birds had contacted the croyza which broke the immune system and I lost 200 from the 800 I got. Now I have treated them. And they are about 7weeks now. Can I give the coryza vaccine? I need guideline on how to raise my pullet from 0-7 weeks before I can vaccinate them.
Kasame Trakullerswilai
We never saw Infectious Coryza in birds below 7weeks of age.
Only symptoms are enough to differentiate Coryza from Other diseases
ND and AI. The mortality is very high. AI finished the flock in less than a weeks time and ND also caused heavy mortality. There is no time for the nasal secretions and swollen heads as we see in Coryza.
The morbidity is high in coryza and mortality in the first week is very low.
ILT also has less mortality but the signs are dry ( No nasal secretions and head swelling ( due to sinusitis)
We can recognize ILT by examining the Trachea of dead birds. We find blood in the trachea to start with as converts to mucous as the disease progresses. The mucous will accumulate in the form of mucous plugs at Larynx.
Coryza can be identified with history of dropped feed consumption and drop in production ( in layers)
Coryza can be treated with Antibiotics and there is no point in waiting for laboratory diagnosis.
If infectious coryza attacks a flock in early growing stage (say below 10 weeks) the treatment with antibiotics is enough. The disease spreads fast and the flock becomes immune for life. The flock does not require vaccination. Prompt treatment and biosecurity keeps the mortality under control.
If the disease occurs on a multiage group farm for the first time where the vaccination was not being practiced, better go for the vaccination for the healthy flocks and tighten the biosecurity. The damage to the farm will be less.
Dear Sir,
Here I came to know that IC Vaccination of Laying bird is allowed if the bird mistakenly not done any Coryza Vaccination before production stage.
Here in Bangladesh, I have a coryza Case treated with Sulfanamide with Erythromycin but after few days it is repeatedly happened. So i want to do inactivated vaccine for permanent immunization.
Dear Habib. The comments made by Dr. Kotaiah Talapaneni (11dic2021) are correct. Recuperated birds will have immunity if infected during rearing. You may vaccinate healthy birds. If antibiotics do not help, you should send samples for isolation of Avibacterium paragallinarum and have them make a sensibility test and select the correct antibiotic.
Vaccination may boost immunization and protection.
United States
