Chlamydia trachomatis: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Introduction Chlamydia trachomatis is a gram-negative bacterium and is an important human pathogen known for causing several diseases. It is an obligate intracellular bacterium, meaning it can only survive and reproduce inside host cells. C. trachomatis primarily infects epithelial cells of the mucous membranes in …

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Corynebacterium diphtheriae: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Corynebacterium diphtheriae colony morpholoy on 5% sheep blood agar after 48 hours of incubation

Introduction Corynebacterium diphtheriae is a gram-positive, rod-shaped bacterium that causes diphtheria, a highly contagious and potentially life-threatening respiratory infection. This bacterium was first identified and described by the German physician Edwin Klebs in 1883, and later confirmed by Friedrich Loeffler and Emil von Behring. The …

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Mycoplasma hominis: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Introduction Mycoplasma hominis is a species of bacteria belonging to the Mollicutes class. It is a unique microorganism as it lacks a cell wall, making it one of the smallest self-replicating organisms known. Due to this feature, it has a pleomorphic appearance, taking various shapes, …

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Escherichia coli: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Greenish metallic sheen of Escherichia coli on Eosin Methylene Blue (EMB) Agar

Introduction Escherichia coli, often abbreviated as E. coli, is a gram-negative, rod-shaped bacterium belonging to the Enterobacteriaceae family. It is one of the most commonly studied and well-known bacteria, both because of its importance in scientific research and its relevance in various aspects of human …

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Citrobacter koseri: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Mucoid colony of Citrobacter koseri on CLED agar of urine specimen

Introduction Citrobacter koseri, formerly known as Citrobacter diversus, is a gram-negative bacterium belonging to the Enterobacteriaceae family. It is a facultative anaerobe, meaning it can grow both in the presence and absence of oxygen. The species name “koseri” is a tribute to the bacteriologist Leo …

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Compound Microscope: Introduction, Principle, Parts, Uses, Care and Maintenance, and Keynotes

Compound Microscope- Introduction, Principle, Parts, Uses, Care and Maintenance, and Keynotes_

Introduction The compound microscope is a fundamental and widely used optical instrument that allows us to magnify and observe small objects or specimens that are otherwise invisible to the naked eye. It is an essential tool in various scientific fields, including biology, medicine, microbiology, and …

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Simple Microscope: Introduction, Principle, Parts, Uses, Care and Maintenance, and Keynotes

Introduction A simple microscope is a basic optical instrument used for magnifying small objects or specimens that are not visible to the naked eye. It consists of a single lens that can be either convex or concave, mounted in a frame with a handle or …

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Semen Culture and Sensitivity: Introduction, Report, Clinical Significance, Common Pathogens, and Keynotes

Semen Culture and Sensitivity: Introduction, Report, Clinical Significance, Common Pathogens, and Keynotes

Introduction Semen culture and sensitivity is a medical test used to evaluate the presence of microorganisms in a man’s semen (ejaculate) and determine their susceptibility to various antibiotics. It is an essential diagnostic tool used to investigate male reproductive health issues, particularly when there are …

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