They are not sophisticated and usually require little in capital expenditures. These management practices do require a positive attitude, a workable program, and proper application. There is a practical way to clean a poultry house or hatchery. Each time, the process involves time, labor, energy, and money, so the job must be done correctly to achieve the best results. Disinfecting alone will not control disease, but combined with other disease control practices, will do much to reduce the incidence of many diseases.
Vaccination is one of the more effective ways to prevent specific diseases.
Disease producing microorganisms can be classified smallest to largest as viruses, bacteria, fungi, protozoa, and parasites. All except the viruses are sensitive to drugs or antibiotics, so treatment against them is available when outbreaks occur. Because viruses are resistant to drugs and antibiotics, their control is fully dependent upon prevention through sanitation, isolation, and vaccination. Usually the biological substance is some of the live disease organisms that you want to protect the bird against. The presence of these organisms in the blood stimulates the body's defense mechanism to produce antibodies that attack the disease causing organisms when the bird is exposed to them.