Airborne Diseases: An Overview
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Questions and Answers

What is the primary mode of transmission for airborne diseases within a 1-meter distance?

  • Contact transmission
  • Vehicle transmission
  • Droplet transmission (correct)
  • Vector transmission

What is the most common type of infectious disease worldwide?

  • Respiratory tract infections (correct)
  • Eye infections
  • Gastrointestinal infections
  • Skin infections

What is the primary function of the ciliary escalator in the respiratory system?

  • To move mucus up and out of the body (correct)
  • To destroy pathogens
  • To trap pathogens
  • To produce mucus

What is the term for the process by which toxins lyse red blood cells?

<p>Hemolysis (B)</p> Signup and view all the answers

Which of the following is NOT a bacterial lower respiratory tract disease?

<p>Diphtheria (C)</p> Signup and view all the answers

What is the term for the normal microbiota that compete against invading pathogens in the lower respiratory tract?

<p>Normal microbiota (B)</p> Signup and view all the answers

What is the purpose of wearing a mask as a preventive measure against airborne diseases?

<p>To improve respiratory hygiene (D)</p> Signup and view all the answers

Which of the following is an example of a viral airborne disease?

<p>Influenza (C)</p> Signup and view all the answers

What is the shape of the bacterium that causes pertussis?

<p>Oval (B)</p> Signup and view all the answers

What is the primary function of the capsule produced by Bordetella pertussis?

<p>To attach to ciliated cells in the trachea (B)</p> Signup and view all the answers

What is the typical incubation period for pertussis?

<p>5-10 days (A)</p> Signup and view all the answers

What is the name of the vaccine that prevents pertussis?

<p>DTaP (D)</p> Signup and view all the answers

What type of pneumonia is caused by Streptococcus pneumoniae?

<p>Typical pneumonia (C)</p> Signup and view all the answers

What is the primary function of the capsule produced by Streptococcus pneumoniae?

<p>To prevent phagocytosis (B)</p> Signup and view all the answers

What is the term for the type of pneumonia caused by non-bacterial microbes?

<p>Atypical pneumonia (B)</p> Signup and view all the answers

What type of hosts are most susceptible to Pneumocystis jirovecii pneumonia?

<p>Immunocompromised hosts (C)</p> Signup and view all the answers

What is the function of mycolic acids in bacteria?

<p>To allow bacteria to survive on surfaces and resist drying (B)</p> Signup and view all the answers

What is the result of mycolic acid inhibiting digestive enzymes of lysosomes?

<p>The pathogen survives and multiplies inside macrophages (C)</p> Signup and view all the answers

What is the difference between Mycobacterium and Non-Mycobacterium?

<p>Mycobacterium stains pink, Non-Mycobacterium stains blue (A)</p> Signup and view all the answers

What is the outcome if a tubercle ruptures?

<p>The bacteria are released from the macrophage and spread to the lungs or bloodstream (C)</p> Signup and view all the answers

What is the term for the bacteria remaining dormant in a tubercle lesion?

<p>Latent Tuberculosis (B)</p> Signup and view all the answers

What is the result of the inflammatory response caused by the bacteria multiplying in macrophages?

<p>The formation of a tubercle lesion (A)</p> Signup and view all the answers

What is the mechanism of transmission of Tuberculosis?

<p>Droplet transmission less than 1 meter (B)</p> Signup and view all the answers

What is the role of alveolar macrophages in the pathogenesis of Tuberculosis?

<p>They engulf and phagocytize inhaled bacteria (D)</p> Signup and view all the answers

What is the primary reservoir of the Rubella virus?

<p>Human (B)</p> Signup and view all the answers

What is the major mode of transmission of Rubella?

<p>Droplet (A)</p> Signup and view all the answers

What is the incubation period of Rubella?

<p>2 to 3 weeks (D)</p> Signup and view all the answers

What is the characteristic of the rash in Rubella?

<p>Discrete and macular (D)</p> Signup and view all the answers

What is the complication of congenital Rubella syndrome?

<p>All of the above (D)</p> Signup and view all the answers

How is Rubella infection prevented?

<p>By the MMR vaccine (D)</p> Signup and view all the answers

What is the duration of the rash in Rubella?

<p>3 to 5 days (B)</p> Signup and view all the answers

What is the characteristic of the Rubella virus?

<p>Non-enveloped, ss RNA virus (B)</p> Signup and view all the answers

What is the reason behind the immune system needing time to respond to influenza?

<p>The spikes of the influenza virus change (A)</p> Signup and view all the answers

What is the primary reservoir of influenza?

<p>Humans (A)</p> Signup and view all the answers

What is the characteristic of pneumonia caused by a virus?

<p>It is atypical (B)</p> Signup and view all the answers

Why is it difficult to diagnose influenza from clinical symptoms alone?

<p>Because the symptoms are acute and short-lived (C)</p> Signup and view all the answers

What is the mortality rate of influenza?

<p>Around 1% (D)</p> Signup and view all the answers

Which age groups are most at high risk for influenza?

<p>Infants and the elderly (A)</p> Signup and view all the answers

What is the characteristic of the multivalent influenza vaccine?

<p>It is composed of killed, multiple strains of the virus (C)</p> Signup and view all the answers

Why is the composition of the influenza vaccine determined annually?

<p>Because the virus changes its strains annually (D)</p> Signup and view all the answers

What is the primary reason why the immune system needs time to respond to influenza?

<p>The spikes on the influenza virus change through antigenic variation (C)</p> Signup and view all the answers

What is the characteristic of pneumonia caused by a virus, as opposed to a bacterium?

<p>It is atypical (A)</p> Signup and view all the answers

Why does the influenza vaccine not provide long-term immunity?

<p>Because the composition of the vaccine changes annually (C)</p> Signup and view all the answers

What is the primary mode of transmission for influenza?

<p>Droplet transmission (B)</p> Signup and view all the answers

Which age groups are most at risk for influenza due to weakened immune systems?

<p>Infants and elderly (C)</p> Signup and view all the answers

What is the term for the type of pneumonia caused by non-bacterial microbes?

<p>Atypical pneumonia (D)</p> Signup and view all the answers

What is the purpose of the multivalent influenza vaccine?

<p>To protect against multiple strains of the influenza virus (B)</p> Signup and view all the answers

What is the mortality rate of influenza among the general population?

<p>Less than 1% (D)</p> Signup and view all the answers

What is the characteristic of β hemolysin produced by Streptococcus pyogenes?

<p>Completely destroys RBCs (D)</p> Signup and view all the answers

What is the function of hyaluronidase produced by Streptococcus pyogenes?

<p>Dissolves connective tissue (C)</p> Signup and view all the answers

What is the primary characteristic of α hemolysis?

<p>Partial destruction of RBCs (A)</p> Signup and view all the answers

What is the classification system used to classify Streptococcus based on cell wall differences?

<p>Lancefield classification system (C)</p> Signup and view all the answers

What is the purpose of the capsule produced by Streptococcus pyogenes?

<p>To adhere to host cells (B)</p> Signup and view all the answers

What is the characteristic of Streptococcal Pharyngitis?

<p>Inflammation of the throat and tonsils (D)</p> Signup and view all the answers

What is the primary reason for the high mutation rate of SARS-CoV-2 variants?

<p>High mutation rate of the protein spikes (C)</p> Signup and view all the answers

What is the diagnosis of Streptococcal Pharyngitis based on?

<p>Serological tests and blood agar (A)</p> Signup and view all the answers

Which of the following antiviral drugs is effective against Influenza Type A if taken within 30 hours of symptom onset?

<p>Oseltamivir (D)</p> Signup and view all the answers

What is the prevention of Streptococcal Pharyngitis achieved by?

<p>Wearing masks and practicing good respiratory hygiene (B)</p> Signup and view all the answers

What is the characteristic of the influenza virus that leads to the need for annual vaccination?

<p>Antigenic variation (A)</p> Signup and view all the answers

Which of the following influenza-related statistics is true?

<p>Influenza causes 3,000 to 50,000 deaths annually in the United States (A)</p> Signup and view all the answers

What is the term for the coronavirus that causes COVID-19?

<p>SARS-CoV-2 (D)</p> Signup and view all the answers

What is the family of viruses to which SARS-CoV-2 belongs?

<p>Coronaviridae (C)</p> Signup and view all the answers

What is the characteristic of the RNA in SARS-CoV-2?

<p>Single-stranded (A)</p> Signup and view all the answers

Why are the SARS-CoV-2 variants of great concern?

<p>Due to their high mutation rate (C)</p> Signup and view all the answers

What is the role of the protein SPICE in the Variola virus?

<p>Inhibits complement proteins (D)</p> Signup and view all the answers

What is the primary mode of transmission of Smallpox?

<p>Airborne transmission (C)</p> Signup and view all the answers

What is the result of the Viremia stage of Smallpox infection?

<p>Skin infections and pus-filled lesions (B)</p> Signup and view all the answers

What is the primary reservoir of the Varicella-Zoster virus?

<p>Humans (A)</p> Signup and view all the answers

What is the characteristic of the rash caused by Smallpox?

<p>Raised and filled with pus (A)</p> Signup and view all the answers

What is the purpose of the Vaccinia Virus vaccine?

<p>To prevent Smallpox (C)</p> Signup and view all the answers

What is the significance of the year 1978 in the context of Smallpox?

<p>The year Smallpox was completely eradicated from the human population (A)</p> Signup and view all the answers

What is the potential threat of Smallpox in modern times?

<p>It is a potential bioterrorism agent (B)</p> Signup and view all the answers

What is the characteristic of the Rubeola virus that allows for the same vaccine to be used year after year?

<p>It has antigenically stable spikes (D)</p> Signup and view all the answers

What is the primary mode of transmission of Measles?

<p>Through droplet transmission (D)</p> Signup and view all the answers

What is the characteristic of the rash in Measles?

<p>It is flat and macular (B)</p> Signup and view all the answers

What is the complication of Measles that occurs in 1 out of 1000 cases?

<p>Encephalitis (B)</p> Signup and view all the answers

What is the name of the vaccine that prevents Measles, Mumps, and Rubella?

<p>MMR vaccine (A)</p> Signup and view all the answers

What is the primary reservoir of Measles?

<p>Human (C)</p> Signup and view all the answers

What is the characteristic of Koplik spots in Measles?

<p>They are clustered, white lesions (D)</p> Signup and view all the answers

What is the difference between Measles and Rubella in terms of fever?

<p>Measles has high fever, Rubella has low fever (D)</p> Signup and view all the answers

What is the primary portal of entry for airborne diseases?

<p>Respiratory tract (B)</p> Signup and view all the answers

What is the ranking of tuberculosis in terms of death from infectious diseases?

<p>1st (C)</p> Signup and view all the answers

What is the most effective way to prevent airborne diseases?

<p>Good respiratory hygiene (D)</p> Signup and view all the answers

What type of infections are the most common worldwide?

<p>Respiratory tract infections (C)</p> Signup and view all the answers

What is the approximate number of people who develop tuberculosis annually?

<p>10 million (B)</p> Signup and view all the answers

What is the function of the ciliary escalator in the respiratory system?

<p>To move mucus up and out of the body (C)</p> Signup and view all the answers

What is the problem with the BCG vaccine?

<p>It gives false positives (A)</p> Signup and view all the answers

What is the role of normal microbiota in the lower respiratory tract?

<p>To compete against invading pathogens (B)</p> Signup and view all the answers

What is the term for the type of tuberculosis that is resistant to second-line drugs?

<p>XDR (C)</p> Signup and view all the answers

What is the name of the enzyme that destroys pathogens in the respiratory system?

<p>Lysozyme (D)</p> Signup and view all the answers

What proportion of the world's population has latent tuberculosis?

<p>1/3 (A)</p> Signup and view all the answers

Which of the following is an example of a bacterial upper respiratory tract disease?

<p>Streptococcal Pharyngitis (D)</p> Signup and view all the answers

What is the ranking of malaria in terms of death from infectious diseases?

<p>2nd (A)</p> Signup and view all the answers

What is the primary outcome of the respiratory system?

<p>To exchange gases (B)</p> Signup and view all the answers

What is the number of people who die annually from tuberculosis?

<p>2 million (A)</p> Signup and view all the answers

What is the purpose of studying tuberculosis?

<p>Because a lot of people die from it (C)</p> Signup and view all the answers

What is the mode of transmission of Smallpox?

<p>Airborne transmission (D)</p> Signup and view all the answers

What is the name of the protein produced by the Variola virus?

<p>SPICE (D)</p> Signup and view all the answers

What is the name of the virus that causes Chickenpox?

<p>Varicella-Zoster Virus (D)</p> Signup and view all the answers

What is the result of the Viremia stage of Smallpox infection?

<p>Skin infections and pus-filled lesions (C)</p> Signup and view all the answers

What is the primary reservoir of the Varicella-Zoster virus?

<p>Humans (B)</p> Signup and view all the answers

What is the characteristic of the rash caused by Smallpox?

<p>Raised and filled with pus (D)</p> Signup and view all the answers

What is the name of the vaccine used to prevent Smallpox?

<p>Vaccinia Virus (D)</p> Signup and view all the answers

What is the significance of Smallpox in modern times?

<p>It has the potential for bioterrorism (A)</p> Signup and view all the answers

What is the primary reservoir of the Measles virus?

<p>Humans (D)</p> Signup and view all the answers

What is the characteristic of the Rubeola virus that allows for the same vaccine to be used year after year?

<p>Antigenically stable (C)</p> Signup and view all the answers

What is the major mode of transmission of Measles?

<p>Droplet transmission (C)</p> Signup and view all the answers

What is the complication of Measles that occurs in 1 out of 1000 cases?

<p>Encephalitis (B)</p> Signup and view all the answers

What is the duration of the incubation period of Measles?

<p>10-12 days (A)</p> Signup and view all the answers

What is the characteristic of the rash in Measles?

<p>Macular, red spots (A)</p> Signup and view all the answers

What is the main difference between Measles and Rubella in terms of fever?

<p>Measles has a high fever, while Rubella has a low fever (C)</p> Signup and view all the answers

What is the name of the vaccine that prevents Measles, Mumps, and Rubella?

<p>MMR vaccine (C)</p> Signup and view all the answers

What is the causative agent of Rubella?

<p>Rubella Virus (D)</p> Signup and view all the answers

What is the primary reservoir of Rubella?

<p>Human (B)</p> Signup and view all the answers

What is the major mode of transmission of Rubella?

<p>Droplet (D)</p> Signup and view all the answers

What is the duration of the rash in Rubella?

<p>3-5 days (C)</p> Signup and view all the answers

What is the complication of Congenital Rubella Syndrome?

<p>Cataracts, cardiac abnormalities, deafness, and intellectual disabilities (B)</p> Signup and view all the answers

What is the preventive measure against Rubella?

<p>MMR vaccine (B)</p> Signup and view all the answers

What is the characteristic of the rash in Rubella?

<p>Discrete, flat (D)</p> Signup and view all the answers

What is the outcome of Congenital Rubella Syndrome in terms of mortality rate?

<p>15% mortality within first year of life (B)</p> Signup and view all the answers

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