Colibacillosis In Poultry: Signs, Causes, Control And Treatment
Colibacillosis In Poultry: Signs, Causes, Control And Treatment; This disease is infectious, and it is caused by Escherichia coli, which is also shortened to E.coli.  This bacterium can cause diseases in poultries across the globe. It can cause cellulitis, which is an infection under the skin.  It is equally associated with respiratory problems in birds.

Colibacillosis can affect broilers from four to six weeks of age. It can equally lead to mortality in birds.  It can cause a decrease in feed conversion, and this can increase the cost of running the poultry.

Colibacillosis In Poultry: Signs, Causes, Control And Treatment
Depression and  disinclination to move

 

 

Nature of the disease

•    Colobacillosis in poultry can be systemic or localized and caused by E. coli, which leads to a reduction in egg production, septicemia and mortality.
•    The well-known outcomes of E. coli infection are coligranuloma, yolk sac infection, egg peritonitis and colisepticaemia. All the conditions are called Colibacillosis.

READ ALSO: Fowl Pox In Poultry: Signs, Causes, Control And Treatment

 

Causes Of Colibacillosis In Poultry

•    E. coli resides naturally in wild birds and digestive tract.  The wild birds transmit infection to poultry flock via direct or indirect routes
•    E. coli can be killed using chemical or physical disinfectants.   They can remain active in low or freezing temperature
•    It can be inactivated by high ammonia concentration in a litter. It can also survive for up to two days at 37oC.
•    Oviduct, caeca, and trachea of birds that recovered from the infection can house E.coli for many weeks.
•    E. coli is not transmitted via the eggs
•    The bacteria can be transmitted by beetles; any bird that eats the beetle gets infected too.

 

Clinical symptoms  

•    The associated symptoms in birds affected by Colibacillosis are a disinclination to move, loss of appetite, depression and respiratory symptoms.
•    The vent will be soiled by diarrhoeic pasty feces
•    In yolk sac infection or coliform omphalitis, mortality is high in the first week after hatching.  The birds will show signs of tenderness to huddle together around a source of heat, depression, nasal swelling and distended abdomen.

•    The head gets swollen due to  Swollen Head Syndrome

ALSO READ: Gout In Poultry: Signs, Causes, Control And Treatment

Colibacillosis In Poultry: Signs, Causes, Control And Treatment
1. Cassiated egg mass inside the oviduct

 

Colibacillosis In Poultry: Signs, Causes, Control And Treatment
2. Egg peritonitis
Colibacillosis In Poultry: Signs, Causes, Control And Treatment
3. Inflammed unabsorbed yolk sac with abnormal colour a

 

Gross lesions

•    Birds having colisepticaemia will develop pericarditis with a cloudy pericardial sac containing fibrous exudate, perihepatitis, and arisacculitis.
•    In yolk sac infection or coliform omphalitis, the yolk will have abnormal smell, consistency, color and volume
•    Salpingitis or oviduct inflation can lead to peritonitis, produce material like foul-smelling pus, distorted ovaries, impaction of oviduct ad abnormal yolk mass or egg.
•    Coligranuloma can lead to millet sized multiply projected granuloma, which is found on the surfaces of the mesentery, caeca, and liver.

 

Prevention and control

•    The treatment should involve control of environmental factors or predisposing infections via the early use of antibacterial agents once susceptibility test shows a positive result.
•    Maintain adequate biosecurity and hygiene  to reduce transmission via eggs contaminated by faces
•    Proper disposal of infected litter and excreta  to prevent spread in the farm and natural water contamination  
•    Overcrowding of the flock and stress can also increase the rate of outbreaks
•    You should buy your birds from sources already tested to be free from Mycoplasma, IB or ND.

READ ALSO: Infectious bronchitis (IB) In Poultry: Signs, Causes, Control And Treatment

 

Treatment Of Colibacillosis In Poultry

Before you carry out any treatment method, make sure you get in touch with a poultry veterinarian. The drugs available may depend on your local regulations.
 
Antimicrobial drugs available for treatment of colibacillosis in both pullets and layers
Drug
Route
Pullets
Breeders/Layers
Indications
Warning
Chlortetracycline
Aureomycin
Feed
200-400g/ton continuously for 7-14 days
200-400g/ton continuously for 7-14 days
Control of chronic respiratory disease (CRD) and air sac infection caused by E.coli
No restrictions for use in laying hens
ditto
ditto
500g/ton continuously for 5 days
500g/ton continuously for 5 days
Reduction of mortality due to E.coliinfections
ditto
Chlortetracycline
Pennchlor
Feed
200-400g/ton continuously for 7-14 days
200-400g/ton continuously for 7-14 days
Control of chronic respiratory disease (CRD) and air sac infection caused by E.coli
Do not feed to chickens producing eggs for human consumption
ditto
ditto
500g/ton continuously for 5 days
500g/ton continuously for 5 days
Reduction of mortality due to E.coliinfections
ditto
Erythromycin
Gallimycin PFC
Water
½g/gal of drinking water continuously for 5 days in pullets up to 16 weeks of age
½g/gal of drinking water continuously for 5 days
To aid control of CRD associated with MG
Do not feed to chickens producing eggs for human consumption
Neomycin/Oxytetracycline
NEO-OXY
Neo-Terramycin
Terraymcin
Pennox
Feed
400g/ton continuously for 7-14 days
Do not use
Control of CRD & air sac infection caused by E.coli
Do not feed to chickens producing eggs for human consumption
ditto
ditto
500g/tom continuously for 5 days
ditto
Control of CRD & air sac infection caused by E.coli
ditto
Tylosin
Tylan
Tylovet
Feed
1,000g/ton to chickens 0-5 days of age; follow with a second administration in feed for 24-48 hours at 3-5 weeks of age
20-50g/ton feed continuously for 4-8 weeks
To aid control of CRD (associated with MG)
No restrictions for use in laying hens
Source: Feed Additive Compendium 2015

 

 
 
 

LEAVE A REPLY

Please enter your comment!
Please enter your name here