How do you distinguish Acinetobacter?
How do you distinguish Acinetobacter?
Identification. Identification of Acinetobacter species is complicated by lack of standard identification techniques. Initially, identification was based on phenotypic characteristics such as growth temperature, colony morphology, growth medium, carbon sources, gelatin hydrolysis, glucose fermentation, among others.
What is the shape of Acinetobacter?
Acinetobacter baumannii is a typically short, almost round, rod-shaped (coccobacillus) Gram-negative bacterium.
What are the characteristics of Acinetobacter baumannii?
baumannii is one of the most challenging bacterial pathogens because of its unique antibiotic resistance characteristics. The genus Acinetobacter includes non-lactose-fermenting, catalase-positive, non-motile, non-fastidious, oxidase-negative, and aerobic Gram-negative coccobacilli.
How does Acinetobacter baumannii spread?
Acinetobacter is spread by contact with a person or environment that has the bacteria. In healthcare facilities, the bacteria can spread from workers’ hands or contaminated surfaces or healthcare items.
Is Serratia marcescens Enterobacteriaceae?
S. marcescens is now accepted as a member of the Enterobacteriaceae order and a bacterium that, along with others within the Serratia genus, often produces a red pigment known as prodigiosin. It should be mentioned that not all pathogenic strains of Serratia produce this red coloration.
What are the characteristics of Serratia?
Another remarkable characteristic trait of Serratia is the production of cell-associated red color pigment, prodigiosin. The pigmented strains are nonpathogenic and used as a biocontrol agent in agriculture. Prodigiosin has been studied to suppress growth of various bacteria, fungi, protozoans, and also in viruses.
What does Serratia marcescens look like on Gram staining?
An S. marcescens gram stain shows short, pink-colored dots, as seen below. Rod-shaped bacteria, bacilliform bacteria or bacilli describe the typical shape of Serratia marcescens.
What agar is used to isolate Serratia marcescens?
DNase agar, which contains DNA, and DTC agar, which contains cephalothin (to which most strains of Serratia are resistant), are also used for isolation. On blood agar and some other media, S. marcescens produces red colonies. As the colonies grow, the colour intensifies.
