Chicken Disease Summary: Classification and Prevention

08/10/2025

Farmers should closely observe and listen to the behavior of their flocks, then adjust their care methods accordingly, as the physical condition of each chicken and each growth stage is different.

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Respiratory diseases group

Disease name	Reason	Symptom	How to room
Newcastle disease (avian distemper)	Virus Paramyxo	High fever, labored breathing, paralysis, twisted neck, and green diarrhea.	Keep the coop clean and regularly sprinkle lime powder. Crush garlic (5g per liter) and mix it with water; crush perilla leaves and ginger and mix them into the feed twice a week, along with perilla and Eclipta prostrata (false daisy) leaves. When chickens get sick: feed each chicken 10 earthworms per day and give them concentrated Eclipta leaf juice to drink 5 times a day.
Avian influenza (H5N1, H5N6)	Influenza A virus	High fever, purple comb, and sudden death.	Keep the coop well-ventilated and disinfect with green tea leaf water or lime water; avoid contact with other flocks. Let the chickens forage for earthworms in the garden and provide Eclipta prostrata (false daisy) leaves. When chickens get sick: feed each chicken 10 earthworms per day and give them concentrated Eclipta leaf juice to drink 5 times a day.
Infectious bronchitis (IB)	Coronavirus	Coughing, nasal discharge, reduced egg production, and thin eggshells.	Keep the coop warm during cold weather and supplement with ginger and lemongrass. Give ginger water in the morning (not in the evening) and warm lemongrass water for 3–5 days, combined with Coleus amboinicus (oregano), perilla leaves, Piper sarmentosum (wild betel leaves), chives, and fish mint (Houttuynia cordata). When chickens get sick:
Infectious laryngotracheitis (ILT)	Herpesvirus	Coughing up blood and wheezing.	Keep the coop clean, reduce dust, and supplement with garlic and ginger. Give the chickens water mixed with crushed garlic, ginger, and Coleus amboinicus (oregano) leaves. When chickens get sick:
CRD (chicken asthma)	Mycoplasma gallisepticum	Wheezing, nasal discharge, and reduced appetite.	Keep the coop well-ventilated and regularly give crushed garlic and ginger in drinking water. Provide water mixed with crushed garlic, ginger, and Coleus amboinicus (oregano) leaves. When chickens get sick:
ORT (Ornithobacterium Respiratory Disease)	Ornithobacterium rhinotracheale	Difficulty breathing, swollen face, and nasal discharge.	Keep the coop well-ventilated and clean. Crush garlic and ginger, mix with warm water, and give it to the chickens to drink. When chickens get sick:

Digestive – Liver – Intestinal Disease Group

Disease name	Cause	Symptoms	How to room
Gumboro	Virus Gumboro	Ruffled feathers, white diarrhea, and swollen bursa of Fabricius	Keep the coop dry and regularly give chickens water infused with fish mint (Houttuynia cordata) or guava leaves to disinfect the intestines. Add fish mint and guava leaves to drinking water for 3–5 days. When chickens get sick:
Viral Hepatitis in Chicks	Hepatitis virus	Swollen liver and sudden death in chicks aged 1–3 weeks.	Maintain cleanliness, avoid damp conditions, and supplement with fish mint (Houttuynia cordata). Give drinking water infused with fish mint, Solanum procumbens (Chinese violet), Eclipta prostrata (false daisy), Phyllanthus amarus (stonebreaker), chrysanthemum flowers, and plantain leaves for 3–5 days. When chickens get sick:
E.coli	E.coli bacteria	Diarrhea, foul-smelling feces, and dehydration.	Clean feeding and drinking containers regularly, and supplement with Paederia foetida (fish vine) or guava leaves twice a week. When chickens get sick: give them thickly boiled mangosteen rind water, 1 spoon, 3 times a day.
Necrotic Enteritis (NE)	Clostridium perfringens	Diarrhea, extremely foul-smelling feces, and sudden death.	Clean the coop floor and avoid moldy feed. Give drinking water made from guava leaves and Paederia foetida (fish vine) for 3–5 days. When chickens get sick: give them thickly boiled mangosteen rind water, 1 spoon, 3 times a day.
Coccidiosis	Intestinal parasites	Bloody diarrhea and lethargy.	Keep the coop floor dry and regularly supplement with Paederia foetida (fish vine) or guava leaves. Crush mugwort leaves, fish vine, and guava leaves, and give the extracted juice to drink for 3–5 days. When chickens get sick: give them thickly boiled mangosteen rind water, 1 spoon, 3 times a day.
Blackhead disease (Histomoniasis)	Histomonas parasite	Darkened comb, weak chickens, and yellow, foamy droppings.	Maintain cleanliness and eliminate intermediate host worms. Crush betel leaves and mix with water for the chickens to drink. When chickens get sick:
Worms and intestinal parasites	Roundworms, whipworms, and pinworms	Thin chickens, ruffled feathers, and slow growth.	Deworm regularly using pumpkin seeds and Paederia foetida (fish vine) leaves. Crush pumpkin seeds and mix with feed; crush fish vine leaves and mix with water. When chickens get sick:

Neurological – Muscular – Joint Disease Group

Disease name	Cause	Symptoms	Prevention methods
Marek	Virus Herpes	Paralysis of legs and wings, discolored iris, and blindness.	Keep the coop well-ventilated, reduce humidity, and supplement with Polyscias fruticosa (dinh lang) leaves and garlic. Crush dinh lang leaves and garlic, and mix with water or feed. When chickens get sick:
Avian Encephalomyelitis (AE)	Virus AE	Tremors, loss of balance, and death in chicks.	Keep the coop warm and clean, and avoid damp conditions. Supplement with garlic, ginger, Polyscias fruticosa (dinh lang) leaves, and perilla leaves. When chickens get sick:
Arthritis – Swollen feet	Bacterial infection or injury	Difficulty walking and swollen joints.	Keep the coop dry with a soft floor. Give warm mugwort (Artemisia) leaf water to drink and apply externally. When chickens get sick:
Vitamin E – Selenium deficiency	Diet lacking vitamin E and selenium	White Muscle Disease / Muscular Weakness	Supplement with vegetable oils and sunflower seeds. Mix sesame oil into feed, and provide water spinach and Polyscias fruticosa (dinh lang) leaves. When chickens get sick:
Vitamin B deficiency	Diet lacking vitamin B	Paralysis of the legs, trembling	Supplement cereal sprouts, yeast Rice water, rice sprouts for feeding When chickens are sick:

Skin and Parasitic Disease Group

Disease name	Cause	Symptoms	Prevention methods
Fowl pox	Virus Pox	Pock lesions on the comb, eyes, and mouth.	Eliminate mosquitoes, keep the poultry area clean, and spray neem leaf water to repel insects. Apply a mixture of crushed garlic, coconut oil, and starfruit leaves to the pox lesions, and give warm lemongrass water to drink. When chickens get sick:
Gapeworm	External parasites	Itching, and chickens pecking each other.	Provide dust baths and spray neem leaf water. Spray concentrated neem leaf water over the entire body. When chickens get sick: crush starfruit leaves into a paste and apply to the skin.
Chicken mites	External parasites	Causes anemia and reduced immunity.	Sprinkle sulfur powder around the nest. Spray neem leaf water and sprinkle diluted sulfur powder. When chickens get sick: crush starfruit leaves into a paste and apply to the skin.
Lice and mites	External parasites	Itching and feather loss.	Provide dust baths with sand and wood ash. Spray neem leaf water and sprinkle diluted sulfur powder. When chickens get sick: crush starfruit leaves into a paste and apply to the skin.

Nutritional and Mineral Deficiency Disease Group

Disease name	Cause	Symptoms	Prevention methods
Vitamin A deficiency	Diet lacking vegetables and vitamin A	Blurred vision, eye inflammation, and pale comb.	Supplement with green vegetables (water spinach), carrots, and pumpkin. Give diluted carrot juice to drink. When chickens get sick: feed them cooked beef liver mixed with fish oil to enhance absorption, 3 times per week.
Vitamin D3 deficiency	Lack of sunlight	Weak bones, deformities, and broken legs.	Allow chickens to bask in the morning sunlight. Crush Polyscias fruticosa (dinh lang) leaves and water spinach, mix with water, and give to drink. When chickens get sick: feed them cooked beef liver mixed with fish oil to enhance absorption, 3 times per week, and let them sunbathe in the morning and afternoon.
Calcium – Phosphorus deficiency	Diet lacking minerals	Thin eggshells and soft bones.	Add bone meal, shells Mix bone meal + spinach to feed When chickens are sick: Feed them crushed shells. 1 time/ 1 week

Note:
- Farmers need to observe and listen to the expressions of the chicken flock, from there adjust the care appropriately, because the physical condition of each chicken and each age stage is different.

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Chicken Disease Summary: Classification and Prevention