What are three different types of contact transmission?

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Presentation transcript:

What are three different types of contact transmission?

What are three different types of contact transmission? Direct Indirect Droplet

What is the difference between a mechanical vector and a biological vector?

What is the difference between a mechanical vector and a biological vector? Mechanical vectors passively transport pathogens Biological vectors are necessary for the life cycle of the parasite Vectors are always living organisms, frequently arthropods

What are different vehicles used for the transmission of disease?

What are different vehicles used for the transmission of disease? Water Air Food Bodily fluids

What is the most common site of nosocomial infections?

What is the most common site of nosocomial infections? Urinary tract

Define LD50

Define LD50 It is the lethal dose for 50% of the hosts It is a measure of virulence

What are 5 ways that bacteria have evolved to penetrate or evade host defenses?

What are 5 ways that bacteria have evolved to penetrate or evade host defenses? Capsules Cell Wall Components Exoenzymes Siderophores Antigenic Variation

What types of molecules are exotoxins?

What types of molecules are exotoxins? Proteins

What types of molecules are endotoxins?

What types of molecules are endotoxins? Lipids (lipid A of LPS)

Which type of toxins can be converted into toxoids?

Which type of toxins can be converted into toxoids? Exotoxins Toxoids are a type of vaccine made of an altered exotoxin

What are the portals of entry for a pathogen?

What are the portals of entry for a pathogen? Mucous membranes Respiratory tract Gastrointestinal tract Genitourinary tract Conjunctiva Skin Parenteral Route