1 Haemophilia A is a recessive X-linked genetic disorder involving a lack of functional clotting Factor VIII and represents 80% of haemophilia cases. 2  Haemophilia B is a recessive X-linked genetic disorder involving a lack of functional clotting Factor IX.
There are other biochemical tests that help to identify Serratia marcescens in the lab. It is negative for the methyl red test due to their production of 2, 3 - butanediol and ethanol, but positive for the Voges-Proskauer test, which shows an organismâs ability to convert pyruvate to acetoin [4].ydrolysis of casein is not a common trait and is therefore useful in the differentiation of Serratia marcescens from the 438 strains of Enterobacteriaceae and Pseudomonadaceae families [12]. Serratia marcescens has the reproducible capability to break down casein producing a clearing on milk agar plates.
By [Brittany Currey] Serratia marcescens, a rod-shaped gram-negative bacterium (0.5-0.8 Âµm in diameter and 0.9-2.0 Âµm in length), is a member of the Enterobacteriaceae family (4, 11). It is a facultative anaerobe that can grow in the presence and absence of oxygen at temperatures between 30Â°C and 37Â°C.