Some Enterobacteriae producers of SH2 are responsible of Infectious Toxic Hepatoenteritis of birds that produces inequality and retardation of growth, bad conversion and less productivity.

The control of Enterobacteriae producers of Hydrogen sulphide (Proteus spp, E.coli spp Pseudomonas spp, Salmonella spp) is basic from a sanitary point of view and consequently from the point of view of the productive efficacy of birds.