Bacterial Biology Quiz

Why are spores more resistant to environmental stresses?

• Spores are more susceptible to heat and moisture.
• Spores are more resistant to environmental stresses due to their thick protective walls and dormant state.
• Spores thrive in active growth conditions.
• Spores have no protective features and are easily damaged.

Bacteria lacking catalase or superoxide dismutase are

• Heterotrophs

• Obligate anaerobes

• Aerobes

• Facultative anaerobes

• Autotrophs

The bacterial cytoplasm:

• Contains peptidoglycan

• Includes endotoxin

• Contains glycocalyx

• Contains enzymes

Write in detail on morphology, culture characteristics and laboratory diagnosis of Staphylococcus aureus

• It grows on nutrient agar producing blue colonies and is motile.
• Staphylococcus aureus is a Gram-negative bacilli that forms spores.
• Staphylococcus aureus is a Gram-positive cocci, non-motile, and non-spore forming. It grows on blood agar producing golden colonies and can cause hemolysis. Diagnosis involves culturing from specimens and performing a coagulase test.
• Diagnosis involves only serological tests without culturing.

Write short notes on Toxic shock syndrome.

• Toxic shock syndrome is primarily caused by food poisoning and results in gastrointestinal symptoms.
• It is a mild condition that only affects children and resolves quickly without treatment.
• Toxic shock syndrome is caused by viral infections and leads to respiratory failure.
• Toxic shock syndrome is a severe illness caused by bacterial toxins, characterized by high fever, rash, and low blood pressure.

What does the abbreviation MRSA mean? Why is MRSA important to note?

• Methicillin-Resistant Staphylococcus Aureus
• Methicillin-Resistant Staphylococcus Anaphylaxis
• Methicillin-Resistant Staphylococcus Aurelius
• Methicillin-Resistant Staphylococcus Albus

Identify two(2) sequelae of a Streptococcus pyogenes infection?

• Rheumatic fever, post-streptococcal glomerulonephritis
• Tuberculosis
• Chronic fatigue syndrome
• Scarlet fever

Describe the microscopic and gram reaction of the Neisseria genus of medical importance.

• Neisseria species are gram-negative diplococci.
• Neisseria species are gram-negative bacilli.
• Neisseria species are rod-shaped bacteria.
• Neisseria species are gram-positive cocci.