Can Serratia marcescens grow on nutrient agar?
Serratia marcescens. Medium-sized colonies that appear buff in colour on Blood Agar. The bacteria produce a red pigment which is easily seen when grown on blood-free media such as nutrient agar or Kings agar B. This culture has been incubated at 30°C.
What does Serratia marcescens need to grow?
Serratia marcescens is short and rod shaped. It is a facultative anaerobe, meaning that it can grow in either the presence of oxygen (aerobic) or in the absence of oxygen (anaerobic).
Is Serratia marcescens spore forming?
marcescens JCM 1239 T, the unique spore-forming characteristic of strain KRED T supported its classification as a novel subspecies of S. marcescens, for which we propose the name Serratia marcescens subsp.
Is Serratia marcescens indole positive or negative?
Biochemical Test and Identification of Serratia marcescens
| Basic Characteristics | Properties (Serratia marcescens) |
|---|---|
| H2S | Negative (-ve) |
| Indole | Negative (-ve) |
| Motility | Positive (+ve) |
| MR (Methyl Red) | Negative (-ve) |
How common is Serratia marcescens?
Serratia marcescens accounts for only 1-2% of the nosocomial infections which are mostly confined to the respiratory tract, the urinary tract, surgical wounds and soft tissues.
Is Serratia marcescens harmful?
Today, Serratia marcescens is considered a harmful human pathogen which has been known to cause urinary tract infections, wound infections, and pneumonia. Serratia bacteria also have many antibiotic resistance properties which may become important if the incidence of Serratia infections dramatically increases.
What are the signs and symptoms of Serratia marcescens?
Symptoms may include fever, frequent urination, dysuria, pyuria, or pain upon urination. In 90% of cases, patients have a history of recent surgery or instrumentation of the urinary tract.
Is Serratia marcescens acid fast?
Structure and Physiology. This bacteria is an acid-fast, bacillus-shaped, aerobic microorganism that is commonly used a surrogate model for M.
Is the hydrolysis of casein common in Serratia marcescens?
Hydrolysis 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.
How does Serratia marcescens survive in an oxygenated environment?
Cell Structure and Metabolism. Primarily it uses fermentation as the means of gathering energy and has enzymes (superoxide dismutase, catalase or peroxides) that protect it from reactive oxygen species, allowing it to live in oxygenated environments. Serratia marcescens is a gram negative bacterium.
Who was the first person to discover Serratia marcescens?
Description and Significance. Serratia marcescens is a motile,short rod-shaped, Gram-negative, facultative anaerobe bacterium, classified as an opportunistic pathogen. It was discovered in 1819 by Bartolomeo Bizio in Padua, Italy.
Why does Serratia marcescens grow on communion wafers?
This and the fact that Serratia marcescens typically grows on bread and communion wafers stored in moist places, has led scientists to suggest Serratia contamination as a possible explanation for transubstantiation miracles (the conversion of bread to the body and blood of Christ).