Haemophilus influenzae: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Introduction Haemophilus influenzae is a Gram-negative bacterium that was originally believed to be the causative agent of influenza (the flu). However, it was later discovered that H. influenzae is not related to the viral infection that causes influenza. Instead, this bacterium is known for causing …

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Extended Spectrum Beta-Lactamase (ESBL): Introduction, List of Bacteria, Pathogenicity, Symptoms, Lab Diagnosis, Treatment, Prevention, and Keynotes

Extended spectrum beta lactamase (ESBL) detection using Double-Disc Synergy Test (DDST)

Introduction ESBL stands for Extended-Spectrum Beta-Lactamase. It refers to a group of enzymes produced by certain types of bacteria that can break down and inactivate a broad range of antibiotics called beta-lactams. Beta-lactams include commonly used antibiotics like penicillins, cephalosporins, and carbapenems. ESBL-producing bacteria are …

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Methicillin-resistant Staphylococcus aureus (MRSA): Introduction, Morphology, Pathogenicity, Symptoms, Lab Diagnosis, Treatment, Prevention, and Keynotes

Nasal Methicillin-resistant Staphylococcus aureus (MRSA) Carriage expressing Cefoxitin and Oxacillin Resistance on Muller-Hinton agar (MHA)

Introduction Methicillin-resistant Staphylococcus aureus, commonly known as MRSA, is a type of bacteria that has developed resistance to multiple antibiotics, including methicillin and other beta-lactam antibiotics like penicillin and cephalosporins. Staphylococcus aureus is a bacterium that can naturally colonize the skin and mucous membranes of …

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Listeria monocytogenes: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Listeria monocytogenes colony morphology on blood agar-Upper side

Introduction Listeria monocytogenes is a gram-positive, rod-shaped bacterium that is widely distributed in nature and can cause a serious foodborne infection known as listeriosis. It is one of the few bacterial species capable of growing at refrigeration temperatures, making it a significant concern for food …

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Scedosporium: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Scedosporium colony morphology on Sabouraud dextrose agar (SDA) of clinical specimen, pus culture

Introduction Scedosporium is a genus of fungi that belongs to the phylum Ascomycota. It is a medically important group of molds known for their ability to cause a wide range of infections in humans. The genus was first described in 1913 by Paul Vuillemin and …

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Acremonium: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Acremonium colony characteristics on Sabouraud dextrose agar of clinical specimen, ear discharge

Introduction Acremonium is a genus of fungi that belongs to the family Hypocreaceae within the order Hypocreales. It is a diverse group of molds commonly found in soil, plant material, and decaying organic matter. They are ubiquitous in nature and can be found in various …

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Trichosporon: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Trichosporon colony morphology on potato dextrose agar (PDA) of clinical specimen culture

Introduction Trichosporon is a genus of yeast-like fungi that belongs to the phylum Basidiomycota. It is commonly found in the environment, especially in soil, water, and various organic matter. Trichosporon species can be opportunistic pathogens, and they are known to cause infections in both humans …

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E. cloacae: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

E. cloacae mucoid growth on CLED agar of Urine Culture

Introduction Enterobacter cloacae is a Gram-negative bacterium belonging to the Enterobacteriaceae family. It is a non-motile, facultative anaerobic, rod-shaped bacterium with a characteristic ability to ferment lactose. The name “cloacae” is derived from the Latin word “cloaca,” which means sewer or drain, indicating the bacterium’s …

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