Spiramycin gives high tissue levels and has very-few side-effects. It is one of the best antibiotics in infections of the upper and lower respiratory tract and of the oral cavity. It is probably one of the most effective antibiotics against chlamydia. Spiramycin is useful when toxoplasmosis occurs during pregnancy or results in severe diseases in non-immunodepressed patients. For the reasons listed above, we believe that spiramycin has been underestimated. This is the result of assessing its value according to its rather high MIC rather than to it's effectiveness against infection in animals and humans.