Biochemical Test of Serratia marcescens

Biochemical Test of Serratia marcescens

­Basic Characteristics Properties (Serratia marcescens)
Capsule Negative (-ve)
Catalase Positive (+ve)
Citrate Positive (+ve)
Flagella Positive (+ve)
Gas Variable
Gelatin Hydrolysis Positive (+ve)
Gram Staining Negative (-ve)
H2S Negative (-ve)
Indole Negative (-ve)
Motility Positive (+ve)
MR (Methyl Red) Negative (-ve)
Nitrate Reduction Positive (+ve)
OF (Oxidative-Fermentative) Facultative Anaerobes
Oxidase Negative (-ve)
Pigment Positive (+ve)
Shape Rods
Spore Negative (-ve)
Urease Positive (+ve)
VP (Voges Proskauer) Positive (+ve)

Fermentation of

Adonitol Positive (+ve)
Arabinose Negative (-ve)
Arabitol Variable
Cellobiose Negative (-ve)
DNase Positive (+ve)
Dulcitol Negative (-ve)
Erythritol Variable
Fructose Positive (+ve)
Fumarate Positive (+ve)
Galactose Positive (+ve)
Glucose Positive (+ve)
Glycerol Positive (+ve)
Lactose Negative (-ve)
Malonate Negative (-ve)
Maltose Positive (+ve)
Mannitol Positive (+ve)
Mannose Positive (+ve)
Melibiose Negative (-ve)
Mucate Negative (-ve)
MyoInositol Positive (+ve)
Raffinose Negative (-ve)
Rhamnose Negative (-ve)
Ribose Positive (+ve)
Salicin Positive (+ve)
Sorbitol Positive (+ve)
Sucrose Positive (+ve)
Tartrate Negative (-ve)
Trehalose Positive (+ve)
Xylose Negative (-ve)

Enzymatic Reactions

Acetate Utilization Variable
Aesculine Hydrolysis Positive (+ve)
Arginine Dehydrolase Negative (-ve)
Casein Hydrolysis Positive (+ve)
Esculin Hydrolysis Positive (+ve)
Lipase Positive (+ve)
Lysine decarboxylase Positive (+ve)
ONPG (β-galactosidase) Positive (+ve)
Ornithine Decarboxylase Positive (+ve)
Phenylalanine Deaminase Negative (-ve)
Tween 80 hydrolysis Positive (+ve)
Tryptophan Deaminase Negative (-ve)
Tyrosine Hydrolysis Variable

Serratia marcescens

About Author

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Sagar Aryal, PhD

Dr. Sagar Aryal is a microbiologist, researcher, and science communicator from Nepal. He is also co-founder and Research Head of the Department of Natural Products at the Kathmandu Research Institute for Biological Sciences (KRIBS), where he leads research on natural product discovery and microbial biodiversity. Dr. Aryal earned his Ph.D. in Microbiology from Tribhuvan University, Kathmandu, Nepal, in 2025, supported by a DAAD Research Grant and a University Grants Commission (UGC) Nepal Ph.D. Fellowship. His research interests include Actinomycetes, Myxobacteria, microbial taxonomy, and natural products, particularly the discovery of bioactive compounds with potential pharmaceutical applications. He isolated and identified Nocardia nepalensis, a novel bacterial species from Nepal, contributing to understanding microbial diversity in the region. Dr. Aryal has published more than 16 research articles in international journals and contributed three book chapters to established academic publications. He has presented scientific research findings and developed international research collaborations through visits to more than 18 countries across Asia, Europe, North America, and Oceania. From 2023 to 2025, he served as the American Society for Microbiology (ASM) Young Ambassador to Nepal. Since December 2025, he has served as an Editorial Board Member of Scientific Reports, a Nature Portfolio journal. In recognition of his scientific contributions, Dr. Aryal received the NAST Science and Technology Youth Award 2025 from the Nepal Academy of Science and Technology. He previously received the Frs. Locke and Stiller Research Award (LSRA) for the 2017-2018 cycle from St. Xavier's College, Kathmandu, and a Nepal Academy of Science and Technology (NAST) Research Grant for 2017-2018. Alongside his scientific career, Dr. Aryal has more than 15 years of experience in blogging, content writing, and search engine optimization (SEO).

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