DNA viruses Flashcards
Adenoviridae was 1st isolated in?
adenoid tissue
True or False:
Adenoviridae is an enveloped, icosahedral, dsDNA
(FALSE)
Naked
Size of adenoviridae
70-90nm
Common serotypes of adenoviridae
1, 8, 11, 21, 35, 37, 40
Serotype of adenoviridae that is commonly associated with Gastroenteritis
40, 41
True or False:
Serotype 4 of adenoviridae causes ARD
(FALSE)
Serotype 14
Serotypes 40 and 41 of adenoviridae are also known as
Enteric adenoviruses
This is a prominent feature of enteric adenoviruses
Diarrhea
This virus is identified but not serotyped by EIA
Adenoviridae serotype 40 & 41
True or False:
Adenoviruses are stable
True
This virus produces a grapelike cluster cytopathic effect
Adenoviridae
HHV-3 is also known as
Varicella-Zoster virus
HHV-4 is also known as
Epstein-Barr virus
HHV-5 is also known as
Cytomegalovirus
HSV-1 & 2 belong to what genus?
Simplexvirus
2 categories of herpes simplex virus
Primary
Recurrent
5 types of herpes infections
Oral herpes Genital herpes Neonatal herpes HSV-Encephalitis Ocular herpes
True or False:
Neonatal herpes is more severe when HSV-1 is involved
(FALSE)
HSV-2
It is the leading cause of fatal sporadic encephalitis in United States
HSV
What treatment is used for HSV-Encephalitis
IV antiviral treatment
It is also known as the HSV of the conjunctiva
Ocular herpes
What is required for a culture-confirmed diagnosis of Encephalitis
Brain biopsy material
It replicates rapidly and cytopathic effect can be seen within 24 hours
HSV
What is the antibody used to type HSV
Monoclonal antibodies
Old tests for HSV uses _______ preparations from lysed cell culture of the virus
Crude antigen
New tests for HSV uses recombinant or affinity purified __________ glycoprotein
type-specific
ELVIS test is known as
Enzyme-linked, virus-inducible system
Baby hamster kidney cells are used for this test
ELVIS test
What color is formed in ELVIS test
Blue
Most common congenital infection in United States
Cytomegalovirus
Virus that spreads easily in crowded populations
CMV
True or False:
In a symptomatic CMV patient, there is an infectious mononucleosis-like illness
(FALSE)
Asymptomatic
When is CMV best confirmed in infants?
first 2 weeks of life
In CMV, after how many weeks does CPE appear?
3 weeks
This test is based on the detection of 65-kDa and Lower-matrix phosphoprotein
Viral antigenemia test
This virus belongs to the genus Lymphocryptovirus
Epstein-Barr virus
Cancers associated with EBV
Burkitt lymphoma
Hodgkin disease
Nasopharyngeal carcinoma
Where can EBV be recovered?
Oropharynx
This virus can be transmitted via infected saliva
EBV
True or False:
In EBV, young children are always symptomatic
(FALSE)
Asymptomatic
the cell targeted by EBV
B lymphocytes
Antibodies produced due to EBV
Heterophile antibodies
This is an excellent rapid screening test for heterophile antibodies
Paul-Bunnel heterophile antibody test
It is also known as the reactivation of VZV
Shingles
Cytopathic changes in VZV is evident for how many days
3-7 days
The standard test for diagnosis of VZV
PCR
Which variant is common cause of HHV-6
Variant B
The most likely route of transmission of HHV-6
Saliva
Serology is not helpful in the diagnosis of HHV-6 unless _________ are available
Paired sera
When can IgM be detected in HHV-6?
5 days after incubation
2 tests that is most sensitive and specific for diagnosing primary HHV-6
PCR
Viral load testing
The receptor for HHV-7
CD4
True or False:
HHV-7 occurs later in life than HHV-6
TRUE
This virus belongs to the genus Rhadinovirus
HHV-8
HHV-8 is also known as
Kaposi sarcoma-associated herpesvirus
HHV-8 is usually transmitted by ________ contact in North America and Europe
Sexual contact
The pattern of infection of HHV-8 is similar to what virus
HSV-2
This virus is associated with common warts and cervical cancer
Papillomaviridae
What do you use for rinsing Cervical HPV lesions?
5% acetic acid
Cells that are indicative of HPV infection
Koilocytes
Condylomata acuminata is also known as
Genital warts
2 types of HPV that causes majority of cervical cancers
Type 16 & 18
Used for the detection of HPV DNA
Nucleic acid probes
Largest DNA virus
Poxviridae
Brick-shaped virus
Poxviridae
Variola virus belongs to what genus
Orthopoxvirus
Variola virus causes what disease?
Smallpox
Virus that has synchronous progressive rash w/ fever
Variola virus
Macular rash progress into _______
Pustules
He demonstrated the efficacy of vaccination against smallpox
Edward Jenner
This virus was introduced by rodents imported from Africa
Monkeypox virus
Smallest DNA virus
Parvoviridae
Principal pathogen in Parvoviridae
Parvovirus B19
The initial viral isolate of parvovirus B19 was observed using?
Electron microscope
Also known as fifth disease
Erthema infectiosum
Virus that gives a slapped cheek appearance
Parvovirus B19
This virus is characterized by a decrease in RBC production in the Bone marrow
Parvovirus B19 Viremia
This occurs within 1 week of patients with Parvovirus B19 Viremia
Reticulocytosis
Novel parvovirus
Human Bocavirus
Human Bocavirus occurs as a co-infection with ____ & ____
RSV (Respiratory scytial virus)
Human metapneumovirus