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S M LEWIS

Publications and source records attributed to S M LEWIS.

At least 19 recordsLinked to original sources
PubMed1964

PRODIGIOSIN-PRODUCING BACTERIA FROM MARINE SOURCES.

Two aerobic, gramnegative, red-pigmented, rod-shaped bacteria were compared morphologically and physiologically with Serratia species, which they resembled superficially. The pigment produced by the marine isolates was shown to be similar to prodigiosin, the red pigment of S. marcescens. The isolates had a single polar flagellum, were oxidative, and did not produce acetoin from glucose or reduce nitrates, which made them distinct from both S. marcescens and S. marinorubra. The latter conformed well to the descriptions of S. marcescens in Bergey's Manual. The marine isolates displayed an absolute growth requirement for sea water or its equivalent. The growth requirement for sea water was replaced by sea-water levels of sodium, potassium, and magnesium chloride. Pigment was produced only when this salt mixture was further supplemented with calcium chloride. Neither sea water nor a high salt level was required for growth or prodigiosin synthesis by the Serratia species examined.

Calcium↗
PubMed1960

The absorption of vitamin B12 in megaloblastic anaemia associated with pregnancy.

The absorption of (60)CoB(12) has been studied in a group of patients suffering from megaloblastic anaemia associated with pregnancy and in a control group. The mean urinary excretion of (60)CoB(12) in the patients with megaloblastic anaemia is not significantly different from that of the control group. Five of the 30 patients showed a value towards the lower limit of normal, but the serum vitamin B(12) content in this group was within the normal range. Malabsorption of vitamin B(12) does not appear to play a significant role in the pathogenesis of this form of megaloblastic anaemia.

Anemia↗