18 Questions
How do many microbes gain access to the body?
Through the respiratory tract
Which part of the body is described as the largest organ in terms of surface area and weight?
Skin
What is the function of mucous membranes in the body?
To line internal body cavities
Which route involves direct deposition beneath the skin or membranes?
Parenteral route
At which pH are most microbes destroyed in the gastrointestinal tract?
Acidic pH
Which part of the body is affected by sexually transmitted infections if transmission occurs without cuts?
Genitourinary tract
How can some microbes gain access to the body through the skin?
By penetrating intact skin
What can establish a parenteral route for microbes to enter the body?
Punctures and cuts
When is the stage set for disease to occur when it comes to the number of invading microbes?
When many microbes are present
What is an example of a bacterial pathogen that can initiate disease from more than one portal of entry?
Bacillus anthracis
Which route of microbial entry into the body is associated with punctures and surgery?
Parenteral route
How do bacterial pathogens penetrate host defenses?
Using capsules and cell wall components
How does the capsule of bacteria resist the host's defenses?
By impairing phagocytosis
Which bacterial component of Streptococcus pyogenes contributes to virulence by mediating attachment and resisting phagocytosis?
M protein
What is the role of coagulases in bacterial virulence?
Clotting fibrinogen to protect the bacterium from phagocytosis
Which process allows some pathogens to obtain free iron from the host?
Secreting siderophores to bind iron more tightly
Which type of bacteria produces a waxy lipid known as mycolic acid to resist digestion by phagocytes?
Mycobacterium tuberculosis
How do kinases contribute to bacterial virulence?
Digesting clots and allowing bacteria to move freely
Explore the aims and objectives of the Microbiology II course for dental students, taught by Dr. Aymen Samir Yassin. Learn about how microorganisms cause infections in humans and how the body responds to their invasion, with a focus on microbial infections in the oral cavity.
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