Sagar Aryal

Sagar Aryal is a microbiologist and a scientific blogger. He is doing his Ph.D. at the Central Department of Microbiology, Tribhuvan University, Kathmandu, Nepal. He was awarded the DAAD Research Grant to conduct part of his Ph.D. research work for two years (2019-2021) at Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Saarbrucken, Germany. Sagar is interested in research on actinobacteria, myxobacteria, and natural products. He is the Research Head of the Department of Natural Products, Kathmandu Research Institute for Biological Sciences (KRIBS), Lalitpur, Nepal. Sagar has more than ten years of experience in blogging, content writing, and SEO. Sagar was awarded the SfAM Communications Award 2015: Professional Communicator Category from the Society for Applied Microbiology (Now: Applied Microbiology International), Cambridge, United Kingdom (UK). Sagar is also the ASM Young Ambassador to Nepal for the American Society for Microbiology since 2023 onwards.

Habitat and Morphology of Listeria monocytogenes

July 27, 2021May 2, 2021 by Sagar Aryal

Habitat of Listeria monocytogenes They are the natural pathogens of wide range of animals, birds, fish, ticks and crustacean. They are saprophytic in soil, water, sewage and plants decaying. They … Read more

Types of antigen on the basis of source and immune response

August 10, 2021May 1, 2021 by Sagar Aryal

On basis of Source/Origin Exogenous antigens: These are antigens which are foreign to host body hence are also called foreign antigens. These are antigens that enters the body of the organism … Read more

Biochemical Test of Streptococcus mutans

May 3, 2022May 1, 2021 by Sagar Aryal

Biochemical Test of Streptococcus mutans Basic Characteristics Properties (Streptococcus mutans) Capsule Capsulated Catalase Negative (-ve) Gram Staining Positive (+ve) Hemolysis Alfa Hemolysis Motility Non-motile OF (Oxidative-Fermentative) Facultative anaerobes Oxidase Negative … Read more

Biochemical Test of Streptococcus agalactiae

May 3, 2022April 28, 2021 by Sagar Aryal

Biochemical Test of Streptococcus agalactiae Basic Characteristics Properties (Streptococcus agalactiae) CAMP Positive (+ve) Capsule Positive (+ve) Catalase Negative (-ve) Coagulase Negative (-ve) Flagella Non-flagellated Gram Staining Positive (+ve) Hemolysis Beta … Read more

Hemolysis of Streptococci- Types and Examples with Images

July 27, 2021April 27, 2021 by Sagar Aryal

Introduction A genus Streptococcus is a heterogeneous group of Gram-positive bacteria. Various streptococci are considered as the normal microbial flora of animals and humans, while some species under favorable conditions … Read more

Lassa Virus- An Overview

August 10, 2021April 27, 2021 by Sagar Aryal

Structure of Lassa Virus The virus is a single-stranded RNA virus belonging to the virus family Arenaviridae. Figure: Structure of Lassa Virus, Source: Swiss Institute of Bioinformatics The virion is spherical … Read more

Crimean-Congo Hemorrhagic Fever Virus- An Overview

August 10, 2021April 27, 2021 by Sagar Aryal

Structure of Crimean-Congo Hemorrhagic Fever Virus Crimean Congo hemorrhagic fever virus falls under the family Bunyaviridae and genus Nairo virus. They are spherical particles 90 to 120 nm in diameter with … Read more

Biochemical Test of Yersinia pestis

May 3, 2022April 26, 2021 by Sagar Aryal

Biochemical Test of Yersinia pestis Basic Characteristics Properties (Yersinia pestis) Capsule Positive (+ve) Catalase Positive (+ve) Citrate Negative (-ve) Flagella Non-Flagellated Gas Negative (-ve) Gelatin Hydrolysis Negative (-ve) Gram Staining … Read more

Pathogenesis and Clinical manifestation of Gardenerella vaginalis

August 10, 2021April 22, 2021 by Sagar Aryal

Pathogenesis of Gardenerella vaginalis A. Adherence of G. vaginalis to Host Epithelium: Initial Steps in Invasion The initial steps of establishing infection include adherence to host receptor sites, production of … Read more

Biochemical Test of Enterobacter cloacae

May 19, 2022April 19, 2021 by Sagar Aryal

Biochemical Test of Enterobacter cloacae Basic Characteristics Properties (Enterobacter cloacae) Capsule Negative (-ve) Catalase Positive (+ve) Citrate Positive (+ve) Flagella Positive (+ve) Gas from glucose Positive (+ve) Gelatin Hydrolysis Negative … Read more