Micro 1 Chp 14 Interaction between microbe and host

Which of the following can contribute to postoperative infections? 

A. Errors in aseptic technique
B. Normal microbiota on the operating room staff
C. Using syringes more than once
D. All of these
E. Antibiotic resistance

Which of the following is NOT a communicable diseases?  

A. Typhoid fever
B. Malaria 
C. Tetanus 
D. Tuberculosis
E. AIDS

Which of the following statements about biological transmission is false?  

A. The pathogen reproduces in the vector
B. The pathogen may enter the host in the vector's feces. 
C. Houseflies are an important vector.
D. The pathogen may require the vector as a host.
E. The pathogen may be injected by the bite of the vector  

The major significance of Koch's work was that ...

A. Microorganisms can be cultured
B. Diseases can be transmitted from one animal to another 
C. Microorganisms are the result of disease. 
D. Microorganisms are present in a diseased animal. 
E. Microorganisms cause disease

One effect of washing regularly with antibacterial agents is the removal of normal microbiota. This can result in...

A. Increased susceptibility to disease 
B. Body odor  
C. Normal microbiota returning immediately 
D. No bacterial growth because washing removes their food source
E. Fewer diseases  

A nosocomial infection is 

A. Always caused by pathogenic bacteria. 
B. Always caused by medical personnel.  
C. Always present but is inapparent at the time of hospitalization  
D. Only a result of surgery. 
E. Acquired during the course of hospitalization

Legionellosis transmitted by a grocery store mist machine is an example of ...

A. Direct contact
B. Vehicle transmission 
C. Vector.
D. Droplet transmission 
E. Fomite

Which of the following diseases is NOT spread by droplet infection?  

A. Botulism  
B. Tuberculosis 
C. Common cold 
D. Diphtheria
E. Measles

Which one of the following is NOT an example of microbial antagonism?  

A. Acid production by bacteria  
B. Bacteria producing vitamin K  
C. Bacteria occupying host receptors
D. Bacteria causing disease  
E. Bacteriocin production  

Emergence of infectious diseases can be due to all of the following EXCEPT  

A. Travel  
B. Digging up soil  
C. Climatic changes  
D. Microbes trying to cause disease
E. Antibiotic resistance  

The most likely mode of transmission of pneumonic plague between humans is  

A. Droplet transmission.  
B. Direct contact.  
C. Vector  
D. Fomite  
E. Vehicle transmission

A commensal bacterium 

A. Is beneficial to its host and Does not infect its host only  
B. May be an opportunistic pathogen.  
C. Is beneficial to its host.  
D. Does not receive any benefit from its host.  
E. Does not infect its host

The science that deals with when diseases occur and how they are transmitted is called  

A. Public health.
B. Ecology  
C. Epidemiology  
D. Communicable disease  
E. Morbidity and mortality 

Haemophilus bacteria require heme protein produced by Staphylococcus bacteria. This is an example of ...

A. Competitive exclusion
B. Commensalism
C. Antagonism 
D. Parasitism  
E. Synergism

Koch observed Bacillus anthracis multiplying in the blood of cattle. What is this condition called? 

A. Bacteremia
B. Septicemia 
C. Systemic infection  
D. Local infection  
E. Focal infection  

Which of the following is a fomite?  

A. A hypodermic needle  
B. Water 
C. Insects  
D. Pus  
E. Droplets from a sneeze

Which of the following definitions is incorrect?  

A. Sporadic - a disease that affects a population occasionally  
B. Endemic - a disease that is constantly present in a population  
C. Pandemic - a disease that affects a large number of people in the world in a short time  
D. Incidence - number of new cases of a disease
E. Epidemic - fraction of the population having a disease at a specified time  

Nosocomial infections are most often caused by  

A. Klebsiella
B. Enterococcus   
C. Staphylococcus aureus   
D. Pseudomonas   
E. Escherichia coli

Pseudomonas bacteria colonized the bile duct of a patient following his liver transplant surgery. This is an example of a..

A. None of these  
B. Latent infection. 
C. Communicable disease  
D. Nosocomial infection
E. Sporadic disease  

Which of the following statements is true? 

A. Members of a symbiotic relationship cannot live without each other.  
B. Symbiosis refers to different organisms living together.
C. Symbiosis refers to different organisms living together and benefiting from each other  
D. At least one member must benefit in a symbiotic relationship.  
E. A parasite is not in symbiosis with its host. 

Symptoms of disease differ from signs of disease in that symptoms  

A. Are changes observed by the physician  
B. Always occur as part of a syndrome  
C. None of these  
D. Are changes felt by the patient  
E. Are specific for a particular disease.

Transient microbiota differ from normal microbiota because transient microbiota....

A. Are present for a relatively short time 
B. Cause diseases.  
C. Are acquired by direct contact.  
D. Never cause disease  
E. Are found in a certain location on the host

The yeast Candida albicans does not normally cause disease because of  

A. Antagonistic bacteria  
B. Symbiotic bacteria. 
C. Other fungi.
D. Commensal bacteria  
E. Parasitic bacteria.  

Which type of infection can be caused by septicemia?  

A. Bacteremia  
B. Viremia  
C. Focal infection  
D. Systemic infection  
E. Local infection