Category: Bacteriology

Rapid Plasma Reagin (RPR) Test for the diagnosis of Syphilis 4.17/5 (6)

Rapid-Plasma-Reagin-(RPR)-Test-for-the-diagnosis-of-Syphilis

Rapid Plasma Reagin (RPR) Test for the diagnosis of Syphilis Introduction Rapid plasma reagin (RPR) is macroscopic, non treponemal, flocculation card test used to screen for syphilis caused by Treponema pallidum. RPR is simple test can be done within few minutes. This test is less sensitive than treponemal test in early syphilis infection. Two types […]

Scrub Typhus- Etiology, Epidemiology, Symptoms, Pathogenesis, Diagnosis and Treatment 4.5/5 (8)

Scrub Typhus- Etiology, Epidemiology, Symptoms, Pathogenesis, Diagnosis and Treatment

Scrub Typhus- Etiology, Epidemiology, Symptoms, Pathogenesis, Diagnosis and Treatment Scrub Typhus is an acute febrile illness which is caused by an obligate intracellular pathogen called Orientia tsutsugamushi, which is transmitted by the bite of infected larval stage trombiculid mite, Leptotrombidium spp. (Chiggers). The name scrub typhus was applied after discovery of increased frequency of the […]

Mannitol Salt Agar for the isolation of Staphylococcus aureus 4.91/5 (11)

Mannitol Salt Agar for the isolation of Staphylococcus aureus

Mannitol Salt Agar for the isolation of Staphylococcus aureus Mannitol Salt Agar (MSA) is used as a selective and differential medium for the isolation and identification of Staphylococcus aureus from clinical and non-clinical specimens. It encourages the growth of a group of certain bacteria while inhibiting the growth of others. It is a selective medium […]

CAMP Test- Principle, Uses, Procedure and Result Interpretation 4.8/5 (15)

CAMP Test- Principle, Uses, Procedure and Result Interpretation

CAMP Test- Principle, Uses, Procedure and Result Interpretation CAMP test is used to distinguish the species Streptococcus agalactiae from other species of beta-hemolytic Streptococcus. S. agalactiae, a member of the Lancefield Group B streptococci, is one of the causative agents of mastitis in cows. CAMP is an acronym for the authors of this test (Christie, […]

Difference between Anthrax Bacilli and Anthracoid Bacilli 4.77/5 (31)

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 Hemolysis absent or […]

Community Acquired MRSA vs Hospital Acquired MRSA 4.52/5 (31)

Community Acquired MRSA vs Hospital Acquired MRSA

Community Acquired MRSA vs Hospital Acquired MRSA S.N. Characteristics Community Acquired MRSA (CA-MRSA) Hospital Acquired MRSA (HA-MRSA) 1. Clinical Infection Skin, Soft tissue, necrotizing pneumonia Pneumonia, urinary, bloodstream, surgical site (multiple site) 2. At risk populations Clusters and outbreaks in closed populations (prisoners, athletes, military, selected ethnic populations, intravenous drug users, soldiers) Outbreaks are associated […]

Virulence Factors of Staphylococcus 4.73/5 (64)

Virulence Factors of Staphylococcus

Virulence Factors of Staphylococcus A.   Cell Wall Associated Virulence Factors Functions Peptidoglycan – Pyrogenicity – Complement Activation – Inhibition of leukocyte migration Techoic Acid – Adherence to mucosal surfaces Capsule – Diffusion Barrier – Prevents Phagocytosis – Capsular serotypes 5 and 8 are most frequently associated with bacteremia and infections B.   Cell Surface Associated Virulence […]

Difference between Neisseria gonorrhoeae and Neisseria meningitidis 4.45/5 (129)

Difference between Neisseria gonorrhoeae and Neisseria meningitides

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 Agents N. gonorrhoeae […]

Differences Between Staphylococcus and Streptococcus 4.56/5 (253)

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 directions (multiple axes). Division occurs […]

Lowenstein-Jensen (LJ) Medium- Composition, Principle, Uses, Preparation and Colony Morphology 4.25/5 (51)

Colony Morphology on LJ Medium

Lowenstein-Jensen (LJ) Medium- Composition, Principle, Uses, Preparation and Colony Morphology Lowenstein-Jensen (LJ) is the selective medium which is used for the cultivation and isolation of Mycobacterium species. It was developed by Lowenstein who incorporated congo red and malachite green to inhibit unwanted bacteria. The present formulation, a glycerated egg-based medium, is based upon Jensen’s modification. Jensen’s version eliminates congo […]

String test for the identification of Vibrio cholerae 4.8/5 (44)

Result of String Test

String test for the identification of Vibrio cholerae Vibrio cholerae is a gram-negative bacilli bacteria with a “comma” shaped body and a flagella for the movement. V. cholerae and V. mimicus are the only Vibrio spp. that do not require salt for growth. The string test may be performed on a glass microscope slide or plastic […]

Optochin Susceptibility Test for the identification of Streptococcus pneumoniae 4.85/5 (13)

Result Interpretaion of Optochin Susceptibility Test

Optochin Susceptibility Test for the identification of Streptococcus pneumoniae Differentiation of Streptococcus pneumoniae from other viridans streptococci depends on demonstrating optochin susceptibility, bile solubility, reaction with a specific DNA probe, or detection of species-specific capsular polysaccharides. Most clinical microbiology laboratories today depend on the optochin susceptibility test. Although optochin susceptibility was first described for differentiating […]

Microbiology Notes © 2014-2016            Site Created: 17th October, 2014            Copyright            Privacy Policy            Terms of Services            Contact Us