Symptoms of mycoplasmosis in chickens and treatment

Among chicken diseases, mycoplasmosis is considered one of the most common ailments. This disease develops even with a slight violation of the conditions of detention. Consider what symptoms are characteristic of this sore and how to treat it.

Symptoms of mycoplasmosis in chickens and treatment

Disease characteristics

Respiratory mycoplasmosis is an infectious disease that affects the airways of chickens.

The causative agent is mycoplasma haliseptium, an intermediate form between the virus and the bacterium. After penetration into the respiratory system affects the reproductive system and muscle tissue.

Not only adults, but also young individuals at the embryo stage are subject to infection.

All breeds are susceptible to this disease, but according to statistics broilers aged 20 to 45 days are more likely to get sick, because they have low immunity.

Roosters are the first to become infected, so the owner needs to pay attention to their appearance and condition. The signs of the cockerels are coughing, sneezing and shortness of breath.

Infection pathways

The sore is transmitted by airborne droplets, less commonly through water and food.

Once in the body, the pathogen settles on the mucous membranes of the mouth, eyes, penetrates the respiratory tract. The peak of development occurs in the autumn, when the weather is stable, damp and cold.

The appearance of mycoplasmosis is not affected by the climate of the region. The infection progresses in a herd that is poorly fed, kept in inappropriate conditions. First of all, individuals with weak immunity and low resistance to bacteria are infected.

Chickens can become infected from a sick brood at the embryo stage or after hatching through the respiratory system.

Often carriers of sores are wild birds, as well as domestic hens that live in the neighborhood. Therefore, the place of walking must be protected to exclude possible contact with them.


The incubation period lasts about 3 weeks. At the same time, infected individuals that do not show any signs of infection are carriers of the virus.

Over 2-4 weeks of illness, all livestock in the household or industrial household are exposed.

Symptoms of mycoplasmosis are different, depending on the stage and degree of progression.

  1. At the initial stage of development, the sore is hidden, it is almost impossible to identify it. The causative agent spreads throughout the body, penetrating into muscle tissue and blood.
  2. The second phase is accompanied by a slight deterioration - lethargy, loss of strength, sneezing, inactivity and decreased appetite. Such symptoms appear, as a rule, in 10-12% of infected individuals, in the rest it is asymptomatic.
  3. The third degree of damage occurs with characteristic problems - complete refusal of food, coughing, intermittent breathing, excessive salivation and the appearance of foam from the beak. The bird's body begins to show maximum resistance. Other signs are redness of the area around the eyes, swelling of the eyelids, wheezing, diarrhea with the release of liquid green or yellow droppings.
  4. At the fourth stage, the symptoms become dull, the infected individual becomes an active carrier of the infection.

In a period of dampness, cold and sudden changes in temperature, the symptoms are aggravated.

Signs in Layers

In laying hens, others join the signs described above:

  • severe damage to the ocular cornea;
  • ovarian inflammation;
  • 15% decrease in productivity;
  • 30% increase in the number of unfertilized eggs;
  • deaths of embryos are increasing by 25%.


Mycoplasmosis in broilers and chickens can appear for several reasons.

  1. Dirty drink in a drinker.
  2. The presence of dangerous insects in the chicken coop.
  3. Poor feed through which the virus is transmitted. For each breed, a specific diet is selected to saturate the body with minerals, vitamins and all the components necessary for life. Feeders should be cleaned regularly and leftovers removed.
  4. Weak immune system.
  5. Genetic susceptibility to the pathogen.
  6. Stressful situations - moving the livestock to another habitat or prolonged transportation.
  7. Vaccination of young animals with live vaccines.
  8. Violation of temperature and ventilation in the chicken coop.
  9. Gas contamination, the presence of a large amount of dust, ammonia and other harmful and toxic substances.


It is possible to determine this sore in chickens or adults by proper diagnosis.

The above symptoms are similar to other bird diseases - pneumonia, colds, pasteurellosis, hemophilia, colibacteriosis and bronchitis.

Only an experienced veterinarian can make an accurate diagnosis, eliminating the likelihood of these diseases.

A bird is examined in several ways:

  • conduct blood sampling to determine the agglutination reaction;
  • take mycoplasma excretions for a smear using a Petri dish filled with agar;
  • analysis of the gene polymer chain reaction, which helps determine the genetic predisposition of the bird before infection.

Treatment methods

We treat chickens with antibiotics

Depending on the age of the bird, different treatment options for mycoplasmosis are used.


After the diagnosis of sick individuals is isolated - placed in a separate room with clean and dry litter, as well as fresh water and dry food.

Young animals are treated with antibacterial drugs. The medicine is administered intramuscularly.

The greatest effect was shown by several means:

  • Enroflon - 1 ml;
  • Tilazine - 0.5 g;
  • Tilan - 0.5 g;
  • Enroflox - 1m;
  • Farmazin - 1 g;
  • Pneumatic - 3 ml.

This dosage is designed for 1 liter of warm water. The treatment regimen, the multiplicity and quantity of drug administration is calculated according to the weight and age of the bird and in accordance with the instructions on the package.

In isolated cases of infection, resettled broilers and chicks of other breeds are treated with one of the drugs - Lilokolin AF, Tilanic, Tilobel or Tialong.


If the diagnosis is not established, it is necessary to treat an adult bird with one of the broad-spectrum antibacterial drugs - Avimutin hydro, Tetracycline, Eriprim or Tilodoxom.

With blurry symptoms, antiviral and antibacterial agents are used:

  • Eriprim - 1 g;
  • Macrodox 200 - 1 g;
  • Hylodox - 1 g;
  • Hydrotriprim - 1 g.

Dosage is calculated per liter of water.

After making an accurate diagnosis, special drugs are used that treat mycoplasmosis - Tialong, Tilosin or Tilokolin AF. The scheme and frequency of therapy according to the instructions.

At the advanced stage of infection, infected individuals are sent for slaughter, because it is impossible to cure the disease.

Respiratory form

The treatment of the respiratory form in chickens and adults is carried out with the help of narrowly targeted antibiotics - Farmazin, Enroksil, Tilsolom or Tilmicovet.

Effectively use this scheme: 1 g of substance per 1 liter of water. All livestock need to be drunk, regardless of their condition and appearance.

Additionally, sanitation of indoor air in the presence of birds is required, and the chicken coop is treated with aerosol, disinfectants:

  • lactic acid (30% concentration) - 10 ml;
  • Monclavite - 3 ml;
  • Iodotriethylene glycol - 0.7 ml;
  • Ecocide - 0.15 g.

The quantity is calculated for spraying over an area of ​​1 m³.

Folk remedies

Nobody has been able to cure this sore with folk remedies, because alternative medicine is powerless in relation to the pathogen.

It is more effective to take measures aimed at increasing immunity:

  • soldering goat milk;
  • daily chickens are given a drink from a glucose solution - 50 g per liter of water;
  • at the age of seven days they begin to solder with the vitamin-mineral complex.

Possible consequences

The defeat of mycoplasmosis in the first place negatively affects the general condition and health of the bird.

Without appropriate medical measures in the herd, both egg and meat productivity decreases, since chickens refuse to drink, feed, become inactive.

With mass infection, a large percentage of embryos die, neoplod increases. The mortality rate varies from 4 to 10%.

Danger to humans

For humans, this virus is not dangerous, but it is not recommended to eat the meat of an infected individual, especially at an advanced stage.

At the initial stage of infection, the bird is allowed to slaughter, then the carcass is subjected to heat treatment for 1.5 hours. Such a product can be eaten.

Eggs from diseased laying hens need to be disposed of. Also, they should not be used to breed new offspring, because the risk of infection of young animals is almost 100%.

Preventive actions

By following simple preventive measures, you can maintain the health of your chickens and their productivity.

  1. From infection with mycoplasmosis, birds are given Furacycline at the rate of 0.5 g per kg of body weight, in parallel with the drug Immunobak, three doses per individual. Such funds are administered orally in the morning and evening for five days. Preventive measures are carried out three times - in individuals aged 4, 5 and 10 months.
  2. Vaccination of chickens from an ailment at an early age.
  3. Balanced feeding, providing birds with fresh and clean water, regular cleaning of the chicken coop. Litter change once a year and its burning.
  4. Annual disinfection of the chicken coop with a solution of formalin or sodium hydroxide of 2% concentration.
  5. Compliance with a stable temperature, humidity and ventilation.
  6. Periodic examination of birds for signs of infection and timely settlement of quarantined sick people.
  7. Prevention of crowding, in which the microclimate in the chicken coop is disturbed and the probability of the appearance of various viruses and bacteria is high.


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