Infectious Coryza

Published on: 06/23/2016
Author/s : María Luciana Cigoy, Yosef Huberman and Horacio Terzolo. Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Balcarce (INTA EEA Balcarce), Argentina.

Introduction Infectious Coryza is a highly contagious bacterial disease caused by Avibacterium paragallinarum (formerly called Haemophilus paragallinarum). It often affects the upper respiratory tract of chickens (Gallus gallus) but has been also described in quails and parrots. Birds of all ages are susceptible. The disease is well known in laying hens although often goes unnoticed in subclinica...

remove_red_eye 5032 forum 52 bar_chart Statistics share print
Share :
close
June 18, 2021

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.

Reply
June 26, 2021
Dear Akpotoge Israel
Antibiotics will not eliminate Avibacterium paragallinarum from your farm. Some strains are very pathogenic, spread rapidly, and may cause high mortality. Vaccination is recommended of course with 2 doses to get the booster effect and improve protection.
Reply
Kasame Trakullerswilai Kasame Trakullerswilai
Bacheler of Veterinary Medicine
June 30, 2021
might be poor biosecurity and some stressor that making bird weaken
next flock if early challenge may first dose at 4-5 wk before break and 6 wk later

after treatment a few week if look healthy 2 more different strain booster
Reply
Taha Taibeh Taha Taibeh
Veterinary Doctor
June 30, 2021
Thanks for valuable information.
Actualy we faced lately that challenge in broilers for (IC & H9N2) & ND was detected on some farms the mortality rate between 20-40% despite the using of AB like Erythromicin..
The signs start bet (14-26 day) & fcr sharply retarded.
I can share some photos with you that shows disaster signs (bloody congested trachea).
If you have any advice please..
Thanks
Reply
June 30, 2021
Taha Taibeh
In this case, it is quite obvious that your birds are stressed and probably their immune system is not functioning. IC strains might be lethal and of course when other agents are involved as well. We did try vaccinating broilers on day 1 (https://doi.org/10.1637/9463-071610-ResNote.1) with fair results. If you can get to include your local strain in the bacterin you should be able to diminish clinical signs and maybe mortality as well. Of course, biosecurity should be improved to avoid other stressful factors like IA, ND and others.
Reply
Kasame Trakullerswilai Kasame Trakullerswilai
Bacheler of Veterinary Medicine
July 1, 2021
Taha Taibeh

necropsy for ND,AI.ILT and laboratory could help
IC may not a core problem at early age like that

Isolation and at least 1 month down time next flock
Reply
July 1, 2021

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.

Reply
Kasame Trakullerswilai Kasame Trakullerswilai
Bacheler of Veterinary Medicine
July 2, 2021
Dr Kotaiah Talapaneni

investigation for preparing of next flock
thanks
Reply
July 2, 2021
Kasame Trakullerswilai
if you are continuing with the same farm and same flocks,
Give 1st dose of Coryza killed ( with A,B,C strains in 6th week 0.5ml by suncutaneous at Neck.
Repeat after 3 weeks ie when the flock is 9weeks.
You can be sure of escaping Coryza.
Reply
July 2, 2021
Dr Kotaiah Talapaneni

Thanks...
We start to see IC signs first in critical age of broiler after 17d & it's respond to the treatment but its play as a key for other diseases mainly ND and AI H9N2 according to the pcr results ilt is negative.
Thanks
Reply
July 3, 2021
Taha Abdallah Altaibeh
coryza is never seen on 17days broilers. recheck your diagnosis at this stage. that can be I.b
Reply
Kasame Trakullerswilai Kasame Trakullerswilai
Bacheler of Veterinary Medicine
July 4, 2021
Dr Kotaiah Talapaneni

IF IC may be better protection but 2nd booster 6-8 wks is better than 3 wks interval
and better management is required , COMPLICATED Problem
Reply
print
(5032)
(52)
Engormix reserves the right to delete and/or modify comments. See more details
Post a comment
Create new discussion :
If this discussion does not cover topics of interest or raises new questions, you can create another discussion.
Consult a professional in private:
If you have a specific problem you can perform a consultation privately to a professional in our community.
Fred Hoerr
Fred Hoerr
DVM, PhD, Diplomate ACVP, ACPV
  Nashville, Tennessee, United States
 
Copyright © 1999-2021 Engormix - All Rights Reserved