[Diagnostic value of serological methods and of the allergy method in studying pullorum disease-fowl typhoid in...

It was established that the positive allergy reaction was best expressed at the forty-eighth hour following the introduction of the allergen. The diagnostic value of the allergy reaction was not shown to surpass that of the serum agglutination reaction. It proved to be close to the value of the other serologic methods of examination (the whole-serum and whole-blood agglutination tests). The allergy method of investigation could be used as a tentative method, resp., reaction test for the detection of infected foci, however, the complete recovery of the infected poultry farms could be achieved with the use of the serologic methods of investigation. The latter could be applied at intervals of 10 to 20 days to detect the carriers of infection.