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.
Serratia bacteria are common inhabitants of our environment and can be found in many places, including human and animal feces, dust, soil, and in surface waters.The bacteria will grow in any moist location where phosphorous containing materials or fatty substances accumulate.ore recently, Serratia marcescens has been found to be pathogenic to a very small percentage of people, having been identified as a cause of urinary tract infections, wound infections, and pneumonia in hospital environments.