(1) The occurrence in a young patient of a chronic cough with dyspnoea and restrictive ventilatory failure as shown by respiratory function tests suggested the possibility of a Mac Leod syndrome.
(2) The total CFU on Mac Leod agar was of a similar order of magnitude.
(3) The samples were dispersed by sonication, diluted stepwise, plated on blood sugar, Mac Leod agar, Mac Concey agar, Rogosa S.L.
(4) Mac Leod's syndrome is a rarely diagnosed disease; that is why an accurate differential diagnosis is needed by means of radiological imaging.
(5) Such are: (1) choreaacanthocytosis supported by molecular abnormalities of the so-called band 3 protein or anion channel; (2) Mac Leod syndrome by deficiency of a membrane protein precursor of Kell antigens; (3) some cases of hereditary spherocytosis associated with qualitative and quantitative ankyrin alterations.