MIC 205 Module 5 Quiz

The terms on the left are related to the length of duration and onset of infections. Match the terms with their appropriate definition and examples. Each term may be used only one time. Acute infection Chronic infection Latent infection

Acute infection - symptoms develop quickly but last short time ex: Flu virus Chronic infection - symptoms develop slowly but last a long time ex: Hepatitis B Latent infection - symptoms develop quickly but are never cleared ex: Chicken pox

You are a public health official from the CDC investigating a recent outbreak in Arizona. Initial investigation reveals that the infection transmits rapidly in all age groups and presents itself in the form of severe gastrointestinal distress followed by multifunction organ failure in infected people. Which of the following could be potential reservoirs of the causative agent?

All of the above answers are possible - asymptomatic humans - symptomatic humans - animals - nonliving reservoirs

Which are factors affecting disease? A. host health and type of microbe B. number of microbes at initial exposure and microbe virulence factors C. port of entry and dose D. host immunity to pathogen E. age and host immunity to pathogen F. gender and genetics G. All of the answers

All of the answers - host health and type of microbe - number of microbes at initial exposure and microbe virulence factors - port of entry and dose - host immunity to pathogen - age and host immunity to pathogen - gender and genetics

The following terms in the left column are related to the manner in which influenza virus can undergo genetic changes. Match the following term with the correct definition in the right column. An answer may be used only one time. Antigenic drift Antigenic shift

Antigenic drift - minor mutations during replication, resulting in small changes in HA and NA genes Antigenic shift - Reassortment of 2 different variants, resulting in novel HA and NA genes

What are the steps of infection of a respiratory virus?

Attachment of virus to respiratory cells, entry into respiratory cells, virus multiplies, virus spreads to other cells

Which of the following would NOT be considered an endemic disease?

COVID-19

Which of the following is NOT a component of the influenza virus?

DNA segments

The term in the left column differentiate diseases based on patterns and geographical concentration in the world. Match these terms with the appropriate definition and example in the right column. An answer may be used only one time. Endemic Epidemic Pandemic

Endemic - localized or geographically constrained disease ex: Valley fever Epidemic - broader geographic distribution of disease ex: Flu Pandemic - global distribution of disease ex: HIV

A vaccine against influenza virus should protect against the common cold.

False

Proteins _______ and _______ on the surface of influenza virus are immunogenic (will elicit the production of antibodies).

H, N

What are the three stages of disease progression (in order, as presented in the video lecture)?

Incubation, Illness, Convalescence

Match the following diseases in the left column with their causative agent in the right. An answer may be used more than one time. Influenza disease Tuberculosis disease Strep throat Common cold

Influenza disease - RNA virus Tuberculosis disease - Gram positive bacili/rod shaped bacteria Strep throat - Gram positive cocci/round shaped bacteria Common cold - RNA virus

The bacteria that causes TB multiplies inside of which of the following cells in the lungs?

Macrophages

An ________ infections is marked by a rapid onset of disease conditions, wherein pathologic changes occur over very short periods of time.

acute

In the progression of disease, the initial period beginning with the entry of pathogen until the appearance of the first symptoms is called _______.

incubation

Rheumatic fever is a caused if the bacteria that causes "strep throat" lingers in the body after the initial infection.

True

The BCG vaccine is not administered to people in USA, because it interferes with the diagnostic test for TB detection.

True

Match the following microorganisms in the left column with properties and structural features that make them unique. An answer may be used only one time. TB Influenza Streptococcus Coldvirus

TB - waxy coating Influenza - Antigenic drift and shift Streptococcus - Destructive toxins Coldvirus - >100 types

Which of the following is NOT a virulence factors of Streptococcus pyrogenes:

P protein interferes with phagocytosis

Which of the following is FALSE about Tuberculosis?

Primary infection in the urinary tract