Sagar Aryal

Sagar Aryal is a microbiologist and a scientific blogger. He attended St. Xavier’s College, Maitighar, Kathmandu, Nepal, to complete his Master of Science in Microbiology. He worked as a Lecturer at St. Xavier’s College, Maitighar, Kathmandu, Nepal, from Feb 2015 to June 2019. After teaching microbiology for more than four years, he joined the Central Department of Microbiology, Tribhuvan University, to pursue his Ph.D. in collaboration with Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Saarbrucken, Germany. He is interested in research on actinobacteria, myxobacteria, and natural products. He has published more than 15 research articles and book chapters in international journals and well-renowned publishers.

Pathogenesis and Clinical Manifestation of Neisseria gonorrhoeae

July 27, 2021April 17, 2021 by Sagar Aryal

Virulence factors or antigenic structures of Neisseria gonorrhoeae A. Pili Pili are the hair like appendages that extend up to several micrometers from the gonococcal surface. It mediates the exchange … Read more

Collection and transport of stool specimens

August 10, 2021April 16, 2021 by Sagar Aryal

Faecal specimens should be collected in the early stages of the diarrhoeal disease, when pathogens are present in the highest number, and preferably before antimicrobial treatment is started, if appropriate. … Read more

Membrane Carbohydrate

September 25, 2022April 12, 2021 by Sagar Aryal

Cell membranes are selective barriers that separate individual cells and cellular compartments. Membranes are assemblies of carbohydrates, proteins, and lipids held together by binding forces. Carbohydrates are covalently linked to proteins (glycoproteins) or lipids (glycolipids) … Read more

Biochemical test of Citrobacter freundii

May 3, 2022April 10, 2021 by Sagar Aryal

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

Biology of the B Lymphocyte

August 10, 2021April 9, 2021 by Sagar Aryal

B lymphocytes They acquired their name from early experiments in chickens. The synthesis of antibody was shown to require the presence of an organ called the bursa of Fabricius (an … Read more

Laboratory diagnosis of Leprosy caused by Mycobacterium leprae

August 10, 2021April 6, 2021 by Sagar Aryal

Laboratory diagnosis of Leprosy caused by Mycobacterium leprae Specimen Skin biopsies, nasal discharges, scrapings from the nasal mucosa and slit-skin smears which are prepared by making superficial incisions in the … Read more