Sagar Aryal, PhD

Sagar Aryal is a microbiologist and a scientific blogger. He completed his Ph.D. degree in Microbiology from the Central Department of Microbiology, Tribhuvan University, Kathmandu, Nepal in 2025. 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 15 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.

Lassa Virus- An Overview

August 8, 2025July 23, 2025 by Sagar Aryal, PhD

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

Biochemical Test of Yersinia pestis

August 8, 2025July 20, 2025 by Sagar Aryal, PhD

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

Biochemical Test of Enterobacter cloacae

August 8, 2025July 17, 2025 by Sagar Aryal, PhD

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

Biochemical Test of Bacillus anthracis

August 8, 2025July 15, 2025 by Sagar Aryal, PhD

Biochemical Test of Bacillus anthracis Basic Characteristics Properties (Bacillus anthracis) Capsule Capsulated Catalase Positive (+ve) Gas Negative (-ve) Gelatin Hydrolysis Positive (+ve) Gram Staining Positive (+ve) Hemolysis Negative (-ve) Indole … Read more

Human Astrovirus- An Overview

August 8, 2025July 14, 2025 by Sagar Aryal, PhD

Structure of Human Astrovirus Human astrovirus falls under Astroviridae and genus Mamastrovirus. The particles are round in shape, 28 nm in diameter with a smooth margin and display a five or … Read more

Gram-positive cell wall

August 8, 2025July 13, 2025 by Sagar Aryal, PhD

Prokaryotic cells almost always are bounded by a fairly rigid and chemically complex structure present between the cell membrane and capsule/slime layer called the cell wall. Peptidoglycan is the main … Read more

Next-Generation Sequencing (NGS): Definition, Types

July 11, 2025June 19, 2025 by Sagar Aryal, PhD

Next Generation Sequencing (NGS) is a robust platform that has enabled the sequencing of thousands to millions of DNA molecules simultaneously. Next-generation sequencing (NGS), also known as high-throughput sequencing, is … Read more

Biochemical Test of Bacillus cereus

December 14, 2025April 17, 2025 by Sagar Aryal, PhD

Basic Characteristics Properties (Bacillus cereus) Catalase Positive (+ve) Citrate Positive (+ve) Gelatin Hydrolysis Negative (-ve) Gram Staining Positive (+ve) Growth in KCN Positive (+ve) Hemolysis Positive (+ve) Indole Negative (-ve) … Read more

List of Myxobacteria species discovered (Updated 2025)

May 2, 2025April 16, 2025 by Sagar Aryal, PhD

Until May 2025, there are two orders, eight families, 31 genera, and 110 species of myxobacteria (validly published under LPSN). These fall under the class Deltaproteobacteria (synonym: Myxococcia) and phylum … Read more

Biochemical Test of Citrobacter freundii

April 9, 2025January 12, 2025 by Sagar Aryal, PhD

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