Posting this just for a handy reference.
Disclaimer: for most small flocks that get out on "healthy" ground (not impacted, muddy ground), aren't raised in overcrowded housing, have fresh water, ARE NOT ROUTINELY GIVEN ANTIBIOTICS, etc. you are very unlikely to have one of these. Most of what's on the list are diseases of CAFO type situations in which the birds are overcrowded and fed antibiotics to encourage growth and prevent the diseases of overcrowding.
So, with that said:
Disclaimer: for most small flocks that get out on "healthy" ground (not impacted, muddy ground), aren't raised in overcrowded housing, have fresh water, ARE NOT ROUTINELY GIVEN ANTIBIOTICS, etc. you are very unlikely to have one of these. Most of what's on the list are diseases of CAFO type situations in which the birds are overcrowded and fed antibiotics to encourage growth and prevent the diseases of overcrowding.
So, with that said:
area; inflamed vent area; increased appetite
How contracted: Fungal disease; contracted through moldy feed and water and surfaces contaminated by infected birds. Often occurs after antibiotic treatment for other reasons.
Treatment: Yes. Ask a vet for Nystatin or other antifungal medication. Remove moldy feed and disinfect water containers.
Vaccine available: No.
Mycoplasmosis/CRD/Air Sac Disease:
Symptoms: Mild form — weakness and poor laying. Acute form — breathing problems, coughing, sneezing, swollen infected joints, death
How contracted: Mycoplasma disease; contracted through other birds (wild birds carry it); can transmit through egg to chick from infected hen.
Treatment: Antibiotics may save birds — see a vet.
Vaccine available: Yes.
Newcastle Disease:
Symptoms: Wheezing, breathing difficulty, nasal discharge, cloudy eyes, laying stops, paralysis of legs, wings, twisted heads, necks
How contracted: Viral disease; highly contagious; contracted through infected chickens and wild birds and is also carried on shoes, clothes, and surfaces.
Treatment: None. Birds under 6 months usually die; older birds can recover. Recovered birds are not carriers.
Vaccine available: Yes, but the U.S. is working to eradicate the disease.
Omphalitis (Mushy Chick):
Symptoms: Newly hatched chicks — enlarged, bluish, inflamed naval area, bad smell, drowsy, weak chicks
How contracted: Bacterial infection of naval from unclean surfaces or chicks with weak immune systems. Can spread from chick to chick on contaminated surfaces.
Treatment: Antibiotics and clean housing sometimes help, but most chicks will die. Remove healthy chicks immediately to clean quarters.
Vaccine available: None. Use caution handling — staph and strep that cause this disease may infect humans.
Pullorum:
Symptoms: Chicks are inactive, may have white diarrhea with pasted rear ends, breathing difficulty, or die without symptoms. Older birds — coughing, sneezing, poor laying.
How contracted: Viral disease; contracted through carrier birds and contaminated surfaces, clothing, and shoes.
Treatment: Destroy all infected birds — birds that recover are carriers. Most chicks infected will die.
Vaccine available: No vaccine, but there is a blood test to find carriers. While the U.S. is trying to eradicate this disease, buy chickens from Pullorum-negative flocks only.
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