Avatar for Sourav Pan

Sourav Pan

Founder of Biology Notes Online, Biology & Microbiology Educator, M.Sc. in Microbiology
Expertise
Microbiology, Immunology, Cell Biology, Molecular Biology, Genetics, Biotechnology, Biochemistry, Botany, Zoology
Education
University of Calcutta
Profile Last Updated: August 10, 2026

Sourav Pan is the founder and sole author of Biology Notes Online. He holds a Bachelor of Science (B.Sc.) degree and an M.Sc. in Microbiology from the University of Calcutta. He creates educational resources covering microbiology, immunology, biotechnology, genetics, cell biology, botany, zoology, and other life-science subjects.

His goal is to make complex biological concepts easier to understand through well-structured, student-friendly articles based on academic textbooks, peer-reviewed research, and authoritative scientific sources. In addition to writing new content, he regularly reviews and updates articles to improve their accuracy, clarity, and educational value.

Baltimore Classification System of Viruses

Electrochemical gradients

The virus uses the host’s complete system for protein translation because they lack translational machinery. Hence, the Baltimore classification system is based on this machinery how viruses use the host mechanism. Messenger RNA (mRNA) is the main focus of this classification system. In the beginning, there were six classes of viruses in Baltimore classification system … Read more

Viroids Definition, Infection, Structure, Examples, Diagnostic, Origin, Disease.

Viroids Replication

Viroids Definition Viroids Structure: Replication of Viroids or Infection of Viroids Viroid RNA replicates autonomously and spreads within the host by recruiting host proteins. There are three enzymes that help in RNA replication such as RNA pol. II, RNAase and RNA ligase. Viroid RNA don’t code for any plant protein and they lack AUG initiation … Read more

Laboratory Diagnosis of Viral Infections

Resonance forms

Diagnosis of viral infections Importance of Viral Diagnosis The Viral diagnosis will be particularly helpful in different clinical situations such as; Diagnosis Methods 1.  The Direct Examination of Specimen The direct method is accomplished by these following processes; 2. Indirect Method or cell cultures (Virus Isolation) The Cytopathic Effect (CPE) is present in both HSV … Read more

Cysticercosis – Definition, Symptoms, Treatment, Diagnosis

Development/Life Cycle of Taenia Solium

What is Cysticercosis? Clinical manifestations of Cysticercosis Cysticercosis is a parasitic infection caused by the larval stage of the tapeworm Taenia solium. The clinical manifestations of cysticercosis depend on the location of the cysticerci (larval stage) within the body. It’s worth noting that not all patients with cysticercosis will experience symptoms. Asymptomatic cysticercosis is often … Read more

Strongyloides stercoralis – Morphology, Life Cycle, Pathogenesis, Diagnosis and Treatment

Strongyloides stercoralis: Parasitic adult female (stained)

Strongyloides stercoralis is a soil-transmitted parasitic nematode and the major causative agent of strongyloidiasis in humans. It has both free-living generation in the soil and parasitic generation inside the host. The most characteristic feature of S. stercoralis is autoinfection, due to which the infection can remain for several years or even decades. During this process, … Read more

Foodborne Giardiasis – Definition, Pathogenesis, Contamination

Foodborne Giardiasis - Definition, Pathogenesis, Contamination

What is Foodborne Giardiasis? Characteristics of Giardia Giardia is a genus of microscopic, single-celled parasites that can cause the infection known as giardiasis. Here are some characteristics of Giardia: Overall, Giardia is a highly adaptable and resilient parasite that can cause a range of symptoms in humans and animals. By practicing good hygiene and food safety … Read more

Candidiasis – Definition, Causative Agent, Types, Transmission

Candidiasis - Definition, Causative Agent, Types, Transmission

Candidiasis, also known as a yeast infection, is a fungal infection caused by a group of yeasts called Candida. Candida is a normal part of the human microbiota and is commonly found in the mouth, gut, and female genital tract. However, when there is an overgrowth of Candida, it can cause infection. Candidiasis can occur … Read more

Fusarium spp – Definition, Structure, Pathogenesis

Fusarium spp - Definition, Structure, Pathogenesis

Kingdom: Fungi Division: Ascomycota Class: Sordariomycetes Order: Hypocreales Family: Nectriaceae Genus: Fusarium Fusarium is a large genus of filamentous fungi belonging to the hyphomycetes group, which is extensively distributed in soil and closely associated with plants. The majority of species are saprobes and are relatively abundant constituents of the soil microbiome. Certain species generate mycotoxins … Read more