Biotypes of Corynebacterium Diphtheriae

Biotypes of Corynebacterium diphtheriae

Corynebacterium diphtheriae is a nonmotile, noncapsulated, club-shaped, gram-positive bacillus. Toxigenic strains are lysogenic for one of a family of corynebacteriophages that carry the structural gene for diphtheria toxin, tox. Corynebacterium diphtheriae is classified into biotypes (mitis, intermedius, and gravis) according to colony morphology, as well … Read more

Difference between O Antigen and H Antigen

Difference between O Antigen and H Antigen

The antigen used to define serological test of Salmonella include Somatic O antigen, Flagellar H antigen and Vi antigen (Capsular antigen). Some of the differences between O Antigen and H Antigen are as follows: S.N. Characteristics O Antigen H Antigen 1. Types Somatic Antigen Flagellar … Read more

Difference between S. pneumoniae and Viridans Streptococci

Difference between S. pneumoniae and Viridans Streptococci

S.N. Characteristics S. pneumoniae Viridans Streptococci 1. Morphology Lanceolate diplococci Oval or round cells in chain 2. Capsule Capsulated Non-capsulated 3. Quellung Test Positive Negative 4. Bile solubility Bile soluble Bile insoluble 5. Inulin fermentation Positive Negative 6. Optochin sensitivity Sensitive Resistant 7. Pathogenicity in … Read more

Difference between Arteries and Veins

Difference between Arteries and Veins

S.N. Characteristics Arteries Veins 1. Blood Circulation Arteries carry blood away from the heart to the tissues of the body. Veins carry blood from the tissues of the body back to the heart. 2. Blood Type Arteries carry oxygenated blood except pulmonary artery. Veins carry … Read more

Difference between Serum and Plasma

Difference between Serum and Plasma

S.N. Characteristics Serum Plasma 1. Definition Serum is the liquid part of the blood after the coagulation. Plasma is a clear and yellowish fluid part of the blood. 2. Composition Serum is the water fluid from blood without the clotting factors. Plasma is the blood … Read more

Difference between Innate and Adaptive Immunity

Difference between Innate and Adaptive Immunity

S.N. Characteristics Innate Immunity Adaptive immunity 1. Presence Innate immunity is something already present in the body. Adaptive immunity is created in response to exposure to a foreign substance. 2. Specificity Non-Specific Specific 3. Response Fights any foreign invader Fight only specific infection 4. Response … Read more

Difference between Replication and Transcription

Difference between Replication and Transcription

S.N. Characteristics Replication Transcription 1. Definition DNA replication is the process of making two daughter strand where each daughter strand contains half of the original DNA double helix. Transcription is the process of synthesis of RNA using DNA as a template. 2. Purpose To conserve … Read more

Difference between Anthrax Bacilli and Anthracoid Bacilli

Difference between Anthrax Bacilli and Anthracoid Bacilli

S.N. Characteristics Anthrax Bacilli Anthracoid Bacilli 1. Motility Non-Motile Generally Motile 2. Capsule Capsulated Non-Capsulated 3. Shape Grow in long chains Grow in short chains 4. Medusa Head Colony Present Not Present 5. Growth in Penicillin Agar (10 units/ml) No Growth Grow Usually 6. Hemolysis … Read more

Difference Between Mold and Yeast

Difference Between Mold and Yeast

S.N. Characteristics Mold Yeast 1 Habitat Typically found in damp, dark or steam-filled areas. Very common. Can be found on fruit and berries, in the stomach of mammals and on skin, among other places. 2 Cell Multicellular (multiple celled) Unicellular (one cell) 3 Shape Filamentous … Read more

Difference between Neisseria gonorrhoeae and Neisseria meningitidis

Difference between Neisseria gonorrhoeae and Neisseria meningitidis

Neisseria gonorrhoeae and Neisseria meningitidis are both Gram Negative Bacteria. They are diplococci, non-sporing, non-motile and oxidase positive. But they have some differences which are as follows: S.N. Characteristics Neisseria gonorrhoeae Neisseria meningitidis 1 Referred as Referred to as gonococcus. Referred to as meningococcus. 2 … Read more

Difference Between Meningitis and Encephalitis

Difference Between Meningitis and Encephalitis

Meningitis and encephalitis may be the most terrifying diseases in medicine. Bacterial meningitis and viral encephalitis may be rapidly fatal, even in healthy persons. Survivors may suffer lasting neurological sequelae, including memory loss and seizures. Viral meningitis, by contrast, gives patients a bad headache and … Read more

Differences Between Staphylococcus and Streptococcus

Differences Between Staphylococcus and Streptococcus

Staphylococcus and Streptococcus are both Gram positive organisms and cocci in shape. They are Non-motile, Non-Sporing and Facultative anaerobes. But they possess some of the differences which are as follows: S.N Characteristics Staphylococcus Streptococcus 1 Arrangement Grape-like clusters. A chain of round cells. 2 Division Staphylococci divide in various … Read more

Differences Between Chickenpox and Smallpox

Differences Between Chickenpox and Smallpox

S.N Characteristics Chickenpox Smallpox 1 Causative Agent Varicella Zoster Virus (Herpes Virus) Variola virus (Pox Virus) 2 Incubation period 14-21 days 7-17 days 3 Severity Chickenpox is less deadly comparing to small pox. Smallpox is deadly severe comparing to chicken pox. 4 Lesions Lesions first … Read more

Differences Between Antigenic Shift and Antigenic Drift

Antigenic Shift and Antigenic Drift

Influenza Virus are remarkable because of the frequent antigenic change that occurs in HA (hemagglutinin) or NA (neuraminidase). The two surface antigens of influenza undergo antigenic variation independent of each other. They are Antigenic Shift and Antigenic Drift. Some of the Differences Between Antigenic Shift … Read more

Differences Between Bacteria and Viruses

Differences Between Bacteria and Viruses

Although bacteria and viruses both are very small to be seen without a microscope, there are many differences between Bacteria and Viruses. Some of the Differences Between Bacteria and Viruses are as follows: S.N. Characteristics Bacteria Viruses 1 Size Larger (1000 nm) Smaller (20-400 nm) … Read more

Differences Between Red Blood Cells (RBC) and White Blood Cells (WBC)

Differences Between RBC and WBC

Red Blood Cells/ Corpuscles (RBC) are also called “Erythrocytes” while White Blood Cells/ Corpuscles (WBC) are also called “Leukocytes”. Some of the differences between Red Blood Cells/ Corpuscles (RBC) and White Blood Cells/ Corpuscles (WBC) are as follows: S.N. Differences Red Blood Cells/ Corpuscles (RBC) White … Read more

Differences Between Antigen and Antibody

Differences Between Antigen and Antibody

Antibodies, also called immunoglobulins, Y-shaped molecules are proteins manufactured by the body that help fight against foreign substances called antigens. Antigens are any substance that stimulates the immune system to produce antibodies. Antigens can be bacteria, viruses, or fungi that cause infection and disease. Following … Read more

Differences Between Mitosis and Meiosis

Differences Between Mitosis and Meiosis

Mitosis is a process of asexual reproduction in which the cell divides in two producing a replica, with an equal number of chromosomes in each resulting diploid cell. Meiosis is a type of cellular reproduction in which the number of chromosomes are reduced by half … Read more

Differences Between B-Cells and T-Cells

Differences between B-Cells and T-Cells

Although mature lymphocytes all look pretty much alike, they are extraordinarily diverse in their functions. The most abundant lymphocytes are: B lymphocytes (often simply called B cells) and T lymphocytes (likewise called T cells). Some of the differences between B Cells and T Cells are as … Read more

Differences between DNA and RNA

Differences between DNA and RNA

Here are 17 differences between DNA and RNA. S.N. DNA RNA 1. DNA stands for Deoxyribonucleic Acid. The sugar portion of DNA is 2-Deoxyribose. RNA stands for Ribonucleic Acid.  The sugar portion of RNA is Ribose. 2. The helix geometry of DNA is of B-Form … Read more

Differences between Enzymes and Hormones

Differences between Enzymes and Hormones

Enzymes are the biological catalyst which speed up the rate of biochemical reactions without undergoing any changes. Hormones are molecules, usually a peptide (eg: insulin) or steroid (eg: estrogen) that is produced in one part of an organisms and triggers a specific cellular reactions in … Read more

Differences Between Bacteremia and Septicemia

Differences Between Bacteremia and Septicemia

Bacteremia is the simple presence of bacteria in the blood while Septicemia is the presence and multiplication of bacteria in the blood. Septicemia is also known as blood poisoning. S.N. Bacteremia Septicemia 1. Bacteremia is the simple presence of bacteria in the blood. Septicemia is … Read more

Differences Between Diarrhea And Dysentery

Differences Between Diarrhea And Dysentery

Diarrhea is a condition that involves the frequent passing of loose or watery stools while Dysentery is an intestinal inflammation, especially in the colon, that can lead to severe diarrhea with mucus or blood in the feces. The major differences between Diarrhea and Dysentery are as … Read more

Differences Between Plasmodium falciparum and Plasmodium vivax

Differences Between Plasmodium falciparum and Plasmodium vivax

Malaria parasites are sporozoans and belongs to order Haemosporida. The genus Plasmodium has been subdivided into nine subgenera, of which three are found in mammals, four in birds and two in lizards. According to the classification, Plasmodium vivax, Plasmodium ovale and Plasmodium malariae belong to the … Read more

Differences Between Exotoxins and Endotoxins

Differences Between Exotoxins and Endotoxins

Many bacteria produce toxins, enzymes and pigments. Toxins and enzymes play important role in pathogenecity. Toxins are of two types: Exotoxins are usually heat labile proteins secreted by certain species of bacteria which diffuse into the surrounding medium. Endotoxins are heat stable lipopolysaccharide-protein complexes which … Read more

Differences Between Cilia and Flagella

Differences Between Cilia and Flagella

Flagella are the complex filamentous cytoplasmic structure protruding through cell wall. These are unbranched, long, thread like structures, mostly composed of the protein flagellin, intricately embedded in the cell envelope. Cilia are slender, microscopic, hair-like structures or organelles that extend from the surface of nearly … Read more

Differences between Light Microscope and Electron Microscope

Light Microscope and Electron Microscope

Differences between Light Microscope and Electron Microscope Light Microscope Electron Microscope Illuminating source is the Light. Illuminating source is the beam of electrons. Specimen preparation takes usually few minutes to hours. Specimen preparation takes usually takes few days. Live or Dead specimen may be seen. Only … Read more