Question 1

Dark staining masses of virions, called Negri bodies, in the brains of victims are diagnostic of
A) Venezuelan encephalitis virus.
B) rabies.
C) eastern equine encephalitis virus.
D) HTLV- 2.
E) California encephalitis virus.

Accepted Answer

Negri bodies are cytoplasmic inclusions found in neurons infected with the rabies virus, making them a diagnostic feature of rabies infection.

Question 2

The human T- lymphotropic virus 1 causes
A) adult acute T- cell lymphocytic leukemia.
B) hairy cell leukemia.
C) Burkitt's lymphoma.
D) Hodgkin's lymphoma.
E) hepatic cancer.

Accepted Answer

Human T-lymphotropic virus 1 (HTLV-1) is known to cause adult T-cell leukemia/lymphoma (ATLL), which is a type of adult acute T-cell lymphocytic leukemia.

Question 3

The transmission of enteric hepatitis is most effectively prevented by
A) good public sanitation and personal hygiene.
B) immunization.
C) vector control.
D) safe sex practices.
E) reducing aerosol dispersion.

Accepted Answer

Good public sanitation and personal hygiene are key in preventing the transmission of enteric hepatitis, which is primarily spread through the fecal-oral route.

Question 4

Which of the following is a family of double- stranded RNA viruses?
A) Retroviridae
B) Reoviridae
C) Rhabdoviridae
D) Coronaviridae
E) Picornaviridae

Accepted Answer

Reoviridae is a family of double-stranded RNA viruses, whereas the other families listed contain either single-stranded RNA or DNA viruses.

Question 5

Fever, fatigue, loss of appetite, and a yellow color of the sclera and skin, without hemorrhaging or kidney damage, are typically observed with
A) hepatitis.
B) yellow fever.
C) dengue fever.
D) gastroenteritis.
E) rubella.

Accepted Answer

These symptoms are characteristic of hepatitis, which is an inflammation of the liver often leading to jaundice (yellowing of the skin and eyes), fatigue, and loss of appetite.

Question 6

Rodents are the normal hosts for which of the following encephalitis viruses?
A) West Nile virus
B) eastern equine encephalitis (EEE)
C) St. Louis encephalitis
D) western equine encephalitis (WEE)
E) Venezuelan equine encephalitis (VEE)

Accepted Answer

Rodents are the normal hosts for Venezuelan equine encephalitis (VEE) virus, which is primarily maintained in rodent populations and transmitted by mosquitoes.

Question 7

Which of the following is MISMATCHED?
A) Sabin vaccine; live attenuated vaccine
B) Salk vaccine; inactivated polio vaccine
C) Salk vaccine; administered orally
D) Sabin vaccine; less stable
E) Salk vaccine; requires boosters

Accepted Answer

The Salk vaccine is an inactivated polio vaccine that is administered via injection, not orally.

Question 8

Humans may become infected with by inhaling aerosols of dried rodent excrement.
A) West Nile virus
B) hantavirus
C) influenza virus
D) Venezuelan encephalitis virus
E) coronaviruses

Accepted Answer

Hantavirus is known to be transmitted to humans through the inhalation of aerosols contaminated with the virus from rodent excrement, urine, or saliva.

Question 9

Which of the following is a family of six- pointed, star- shaped viruses that cause gastrointestinal diseases?
A) Rhabdoviridae
B) Caliciviridae
C) Picornaviridae
D) echovirus
E) Coronaviridae

Accepted Answer

Caliciviridae is a family of viruses that includes noroviruses, which are known for their star-shaped appearance and are a common cause of gastroenteritis.

Question 10

A child has fever, chills, muscle aches, and conjunctivitis. She is also developing a rash caused by subcutaneous hemorrhaging and complains about exposure to sunlight. With which of the following viruses might she be infected?
A) mumps virus
B) coxsackie B virus
C) rotavirus
D) hantavirus
E) coltivirus

Accepted Answer

Coltivirus, specifically the Colorado tick fever virus, can cause symptoms such as fever, chills, muscle aches, conjunctivitis, and a rash due to subcutaneous hemorrhaging. It is also associated with sensitivity to sunlight.

Question 11

An emerging fatal disease in humans caused by one of the members of the Paramyxoviridae is known as
A) Nipahvirus.
B) Morbillivirus.
C) Rubulavirus.
D) respiratory syncytial virus.
E) Pneumovirus.

Accepted Answer

Nipahvirus is a member of the Paramyxoviridae family and is known to cause severe and often fatal disease in humans.

Question 12

Ebola hemorrhagic virus is caused by which type of virus?
A) filovirus
B) paramyxovirus
C) pneumovirus
D) rubulavirus
E) rhabdovirus

Accepted Answer

Ebola hemorrhagic virus is caused by a filovirus, which is a family of viruses that includes the Ebola virus.

Question 13

The West Nile virus is considered a(n)
A) coronavirus.
B) enterovirus.
C) rhinovirus.
D) flavivirus.
E) togavirus.

Accepted Answer

West Nile virus is classified as a flavivirus, which is a genus of viruses that includes other mosquito-borne viruses like dengue and Zika.

Question 14

The HIV virion is best described as a(n)
A) unsegmented RNA genome in a long flexible helical capsid with envelope.
B) segmented RNA genome in an irregular polyhedron capsid with envelope.
C) segmented RNA genome in an icosahedral capsid, without envelope.
D) unsegmented RNA genome in a helical capsid with an envelope.
E) segmented RNA genome in helical capsids and an envelope.

Accepted Answer

The answer of The HIV virion is best described as...

Question 15

Which of the following RNA virus families include the smallest viral pathogens in animals?
A) Paramyxoviridae
B) Arenaviridae
C) Picornaviridae
D) Coronaviridae
E) Rhinoviridae

Accepted Answer

Picornaviridae includes some of the smallest RNA viruses, such as poliovirus and rhinovirus, which are among the smallest viral pathogens in animals.

Question 16

The recent epidemic of SARS virus was caused by a(n)
A) coronavirus.
B) flavivirus.
C) adenovirus.
D) togavirus.
E) rhinovirus.

Accepted Answer

The SARS virus is caused by a coronavirus, specifically the SARS-CoV (Severe Acute Respiratory Syndrome Coronavirus).

Question 17

Which of the following viruses is considered a childhood disease, was first identified by a German physician, and is known to cause "three- day measles"?
A) rhinovirus
B) echovirus
C) coxsackie A virus
D) rubella
E) roseola

Accepted Answer

Rubella, also known as "three-day measles," is a childhood disease first identified by a German physician.

Question 18

Enteric hepatitis is fatal for 20% of people in which of the following groups?
A) pregnant women
B) elderly men
C) young adults
D) infants under the age of one year
E) teenagers

Accepted Answer

Enteric hepatitis, specifically Hepatitis E, is particularly dangerous for pregnant women, with a high mortality rate of around 20% during the third trimester.

Question 19

Which of the following viruses is suspected of being a cause of diabetes mellitus?
A) hepatitis A
B) enteroviruses
C) echoviruses
D) coxsackie B virus
E) coxsackie A virus

Accepted Answer

Coxsackie B virus has been implicated in the development of diabetes mellitus.

Question 20

The causes a T cell leukemia.
A) hepatitis C virus
B) hepatitis B virus
C) HIV
D) hantavirus
E) HTLV- 1

Accepted Answer

HTLV-1 (Human T-cell Leukemia Virus type 1) is known to cause adult T-cell leukemia/lymphoma.

Quiz 25: Pathogenic Rna Viruses

Dark staining masses of virions, called Negri bodies, in the brains of victims are diagnostic of

The human T- lymphotropic virus 1 causes

The transmission of enteric hepatitis is most effectively prevented by

Which of the following is a family of double- stranded RNA viruses?

Fever, fatigue, loss of appetite, and a yellow color of the sclera and skin, without hemorrhaging or kidney damage, are typically observed with

Rodents are the normal hosts for which of the following encephalitis viruses?

Which of the following is MISMATCHED?

Humans may become infected with by inhaling aerosols of dried rodent excrement.

Which of the following is a family of six- pointed, star- shaped viruses that cause gastrointestinal diseases?

A child has fever, chills, muscle aches, and conjunctivitis. She is also developing a rash caused by subcutaneous hemorrhaging and complains about exposure to sunlight. With which of the following viruses might she be infected?

An emerging fatal disease in humans caused by one of the members of the Paramyxoviridae is known as

Ebola hemorrhagic virus is caused by which type of virus?

The West Nile virus is considered a(n)

The HIV virion is best described as a(n)

Which of the following RNA virus families include the smallest viral pathogens in animals?

The recent epidemic of SARS virus was caused by a(n)

Which of the following viruses is considered a childhood disease, was first identified by a German physician, and is known to cause "three- day measles"?

Enteric hepatitis is fatal for 20% of people in which of the following groups?

Which of the following viruses is suspected of being a cause of diabetes mellitus?

The causes a T cell leukemia.