Ranikhet (Newcastle) Disease in Poultry

Quick answer: Ranikhet disease — also called Newcastle Disease (ND) — is a highly contagious viral disease of chickens and other poultry caused by a paramyxovirus. It spreads fast and can wipe out most of an unvaccinated flock, so protection depends on a strict vaccination schedule (Lasota or F1 at 5–7 days, R2B/RDVK around 8 weeks, and a booster before lay at 16–18 weeks) plus good biosecurity. There is no specific medicine that cures an infected bird, so the whole strategy is prevention: vaccinate on time, block the virus from entering the shed, and keep birds' immunity and gut strong so vaccines work and stress does not trigger an outbreak.

What is Ranikhet (Newcastle) Disease?

Ranikhet disease is caused by avian avulavirus type 1 (Newcastle Disease virus). It affects chickens most severely but can also infect ducks, turkeys, pigeons and wild birds. Virulent (velogenic) strains attack the respiratory, digestive and nervous systems at the same time, which is why sick birds show breathing, gut and nerve signs together. In India it is one of the biggest causes of loss in both commercial and backyard poultry, and outbreaks tend to rise when the weather changes and when birds are already stressed.

Signs of Ranikhet Disease in Poultry

In chicks and young birds

• Sudden deaths, often with few earlier signs
• Sneezing, gasping and open-mouth breathing
• Droopiness, huddling and going off feed

In grown and laying birds

• Ruffled feathers, depression and drop in feed and water intake
• Greenish, watery diarrhoea with a foul smell
• Sharp fall in egg production; soft-shelled or misshapen eggs
• Gasping and profuse salivation that can block breathing

Nervous signs — a twisted neck (torticollis), paralysed wings or legs, tremors and birds walking in circles — usually appear a few days into the outbreak and strongly point to Ranikhet. A vet should confirm the diagnosis, because early ND can look like infectious bronchitis or fowl cholera.

How Ranikhet Spreads

The virus is shed in droppings and respiratory discharges and spreads through contaminated feed, water, litter, crates, egg trays, footwear, hands and equipment, as well as by wild birds and the wind over short distances. New or sick birds brought into a flock are a common way the virus enters. Because it moves so quickly, one infected corner of a shed can seed the whole flock within days.

Ranikhet Vaccination Schedule in India

Vaccination is the single most important control measure. A commonly followed schedule for Indian conditions is:

• Day 5–7: Lasota or F1 strain (live, mild) — given by eye or nose drop, or through drinking water.
• Around 6–8 weeks: R2B / RDVK (Mukteswar strain) — given by injection under the skin.
• 16–18 weeks (layers and breeders): a killed or live booster before the birds start laying, then repeated every few months in high-risk areas.

Follow the schedule advised by your veterinarian or the vaccine manufacturer for your bird type and region. A few birds can react to the stronger Mukteswar-strain vaccine, and reactions are worse in birds that are malnourished or carrying worms — so deworm and get nutrition right before vaccinating, and never vaccinate sick birds. Store and reconstitute vaccines exactly as directed, because a broken cold chain is a common reason vaccination fails.

Supportive Care and Natural Protection

Since there is no cure once birds are infected, day-to-day management decides your risk:

• Biosecurity first: control who and what enters the shed, disinfect footbaths and equipment, keep wild birds out, and isolate and separate any new or sick birds.
• Remove and safely dispose of dead birds immediately to cut down virus load.
• Reduce stress and support immunity: heat stress, transport, crowding and vaccination itself all suppress immunity. A natural vitamin C source such as Naturcee — vitamin C from amla (Emblica officinalis) — is used around vaccination, heat spells and disease challenge to help support the antibody response and stress resilience.
• Protect gut health: a strong, balanced gut helps birds withstand challenge and recover; herbal gut modulators such as Diagut support intestinal balance and litter quality.

For more on keeping flocks resilient, see our guides on boosting immunity in stressed poultry, gut health in poultry, and managing stress in poultry. These products are from Makams Agrivet, the poultry range of Makams Industries, and support birds around vaccination — they do not replace it.

Frequently Asked Questions

Is there a treatment or cure for Ranikhet disease?

No specific antiviral cures Ranikhet. Care is supportive — isolation, warmth, clean water, electrolytes and vitamins, and antibiotics only if a vet suspects a secondary bacterial infection. Prevention through vaccination and biosecurity is the only reliable protection.

Can vaccinated birds still catch Ranikhet?

Well-vaccinated flocks are far better protected, but immunity can fail if the cold chain broke, the timing was wrong, birds were sick or wormy at vaccination, or the field virus pressure is very high. That is why timely boosters, good storage and low stress all matter.

Can Ranikhet disease spread to humans?

Newcastle Disease virus can rarely cause a mild, short-lived eye irritation (conjunctivitis) in people with very close contact, such as vaccinators. It is not a serious human disease and is not a food-safety risk from properly cooked poultry or eggs.

Ranikhet is a notifiable, fast-moving disease. If you see sudden deaths, greenish diarrhoea or nervous signs, isolate the flock and contact your veterinarian or local veterinary hospital immediately.

References: ICAR / TNAU Agritech Portal — Poultry Disease Management; National Center for Biotechnology Information (PMC) — Newcastle Disease in backyard poultry. This article is for general educational guidance for Indian poultry farmers and does not replace advice from a qualified veterinarian.

By Cattle Remedies (MAKAMS) — Makams Industries Pvt. Ltd.