What are the pathogenic microorganisms that cause respiratory tract infections in chickens

Chronic respiratory disease in chickens in winter is a chronic contact infectious disease of chickens and turkeys caused by Mycoplasma septicum infection in chickens, characterized by dyspnea and swelling of the infraorbital sinus.

Clinical features]:

Difficulty breathing;Eyelid adhesions and swelling of the infraorbital sinuses, protruding eyes, and white cheese-like substance inside.

Pathologic features: Inflammation of the respiratory tract and balloonitis.

Popular Features]:

1 2 months of age is the most susceptible, with an infection rate of 20% to 70%, mostly chronic, and low mortality. It is more common in the cold season.

Differential diagnosis: pay attention to distinguish it from infectious rhinitis in chickens and colibacillosis in chickens. Sick chickens breathe with their mouths open. Caseous material within the infraorbital sinus. The walls of the balloon are slightly cloudy with yellowish-white bubbles.

Prevention and control measures]:

1) Breeder farms should establish a purified breeder flock to block vertical transmission.

2) At present, attenuated vaccines and inactivated vaccines are used for the prevention of chronic respiratory diseases in chickens, which can significantly reduce the incidence of this disease.

3) Erythromycin, tylosin, jeremycin, lincomycin and doxycycline are used in the sick flock, due to drug resistance (4) The presence of septicemia mycoplasma strains is best used with reference to the results of drug susceptibility test.

Chicken coccidiosis is mainly transmitted through the respiratory tract. （

a.That's right. b.Mistake.

Correct answer: B

Answer analysis: chicken coccidiosis is mainly caused by ingestion of coccidiosis contaminated with coccidiosis eggs and drinking potato travel water and feed, and chicken coccidiosis is mainly transmitted through the digestive tract.

Respiratory tract infection is a very common disease in life, and many animals may have problems in this regard, so what is the specific medicine for respiratory tract infection in chickens?

Xinmu White and Black specializes in the treatment of respiratory tract, chronic respiratory diseases, colds, fever, cough, snoring, elevation, balloonitis, embolism, infectious bronchitis, and high incidence of respiratory balloonitis.

Chicken chronic respiratory disease, also known as chicken mycoplasmosis and chicken mycoplasmosis, is a general term for a class of diseases caused by chicken mycoplasma septica. It is characterized by pronounced respiratory symptoms, a long course of disease, slow progression, and balloonitis on autopsy. Mycoplasma septicum is between bacteria and viruses in size, has a small spherical rod-shaped shape, has no cell wall, has a good Giemsa staining effect, and has a weak negative Gram staining.

The bacterium has strict nutritional requirements, and 10% 15% horse serum is usually added to the petri dish, and 37 is cultured at constant temperature in a humid environment for 2 3 days, and characteristic colonies can be grown. Mycoplasma septicum has low resistance to the external environment, and most commonly used chemical disinfectants can kill it, and it is sensitive to tylosin, florfenicol, tilmicosin, enrofloxacin and other drugs, and streptomycin also has a certain effect.

The disease has the characteristics of rapid onset, slow transmission and long course of disease. Chickens of all kinds of days can be infected with the disease, the incidence of native chickens in the chick stage is low, and it begins to increase gradually after 3 weeks, with 4 8-week-old chickens being the most susceptible, sick chickens and infected chickens are the main sources of infection, through the respiratory tract, digestive tract, mating and vertical transmission through eggs. The occurrence of the disease has no obvious seasonality, poor feeding management, poor environmental sanitation conditions, stress, poor ventilation, sudden climate change, nutritional deficiency, etc. can cause the onset of the disease, the general incidence is 10%, in the case of secondary infection, the incidence can reach 70%, and the mortality rate is about 20% 40%.

The relevant treatment of respiratory tract infections is introduced to you here, if it is a poultry condition, then you should use the relevant ** drugs under the guidance of a professional veterinarian.

Onset type 1Bacterial Respiratory Diseases, 2Viral Respiratory Diseases, 3

Parasitic Respiratory Diseases 4Toxic respiratory diseases Prevention and control measures 1Note the introduction of 2

Strengthen feeding management 3Rational use of vaccines and medicines.

The infectious disease of chickens, like the infectious diseases of humans and animals, is caused by a certain pathogenic microorganism that invades the body of chickens, and settles and reproduces in a certain part of the body.

It has a series of pathological changes that manifest unique to clinical symptoms. They have some common features. Infectious diseases in chickens are contagious and epidemic, spreading rapidly and with a high infection rate.

Infectious diseases in chickens are caused by the invasion of specific pathogens into the body, such as Newcastle disease in chickens caused by Newcastle disease virus. Infected chickens can produce specific immune responses and produce antibodies under the action of pathogenic microorganisms. Resistant chickens can be immunized, and will not suffer from the disease again for a certain period of time, and some even will not suffer from the disease for life.

Infectious diseases in chickens have their own clinical manifestations and pathological processes.

Whether pathogenic microorganisms can develop disease after invading the body of chickens is related to the number of microorganisms entering the body, the transmission route and the resistance of the chicken itself. To prevent and extinguish infectious diseases in chickens, comprehensive prevention and control measures should be taken, mainly including three aspects: identifying and eliminating the source of infection, cutting off the transmission route, and improving the resistance of chickens to epidemic diseases.

It's the source of infection, what does the source of infection refer to, it's the virus, since the hall carries the virus, then this chicken is the source of infection, regardless of whether it is infected or not. What is the mode of transmission, that is, the vector of virus transmission, of course, this carrier can be a living thing or an air shed like a dead thing, and the chicken that does not carry the virus is the carrier!

Chickens that carry the influenza virus, ordinary chickens and black chickens, and broiler chickens can all be tagged or carry the influenza virus. These Youliang chickens belong to the source of infection. The one who is transmitted because he carries it is also a mode of transmission, because the virus is still parasitic on him.

Avian diseases caused by influenza viruses are called avian influenza diseases, also known as avian influenza virus diseases.

The susceptibility caused by the influenza virus is called the susceptibility virus disease.

Avian influenza viruses can only infect birds.

**Viruses can only infect humans.

This is the natural law of coexistence between humans and animals.

Infectious diseases are a group of diseases caused by various pathogens that can spread from person to person, animal to animal, or person to animal.

The route of transmission must have three basic links: the source of infection, the route of transmission and the susceptible population.

Infectious diseases are a class of diseases caused by various pathogens that can be transmitted from person to person, animal to animal, or person to animal. Most of the pathogens are microorganisms, and a small part are parasites, which are also called parasitic diseases. For some infectious diseases, the epidemic prevention department must grasp the incidence of the disease in a timely manner and take countermeasures in a timely manner, so after being discovered, it should be reported to the local epidemic prevention department in a timely manner according to the specified time, which is called a notifiable infectious disease.

At present, there are 39 types of notifiable infectious diseases in China, including A, B and C.

The whole process of the pathogen being excreted from the infected person, passing through a certain transmission route, and passing into the susceptible person to form a new infection. In order for an infectious disease to occur and spread among a certain population, there must be three basic links: the source of infection, the transmission route and the susceptible population.

Respiratory infections: epidemics, tuberculosis, mumps, measles, whooping cough, etc. (airborne).

The infection of the chicken comes.

The disease is caused by infectious agents of various origins (eg, viruses, bacteria, mycoplasma, rickettsies.

Du's body, chlamydia, spirochetes, etc.) invade the body of chickens, and settle, grow and reproduce in chickens, thereby causing a series of pathological damage to the chickens, and the typical clinical symptoms of specific diseases appear in chickens, and infectious agents (pathogens) can be excreted from the chickens, and then infect other chickens, causing the rebirth of the same disease and the occurrence or epidemic in large quantities. Infectious diseases cause direct damage to the growth and development or production performance of chickens, pose the greatest threat and serious losses to the chicken industry, and are the focus of all chicken disease prevention and control.