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56 Cards in this Set
- Front
- Back
HCMV Classification:
- family - subfamily - genus |
herpesviridae
betaherpesvirinae cytomegalovirus |
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HCMV Epidemiology:
- natural host - prevalence - transmission |
humans
worldwide person-to-person (body fluid) |
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Associate HCMV's involvement as an agent of the following:
- congenital - opportunistic - complications |
#1 viral infectious cause of congenital CNS damage (TORCH agent)
Leading opportunistic pathogen in AIDS patients Leading cause of complications in transplant patients |
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HCMV can cause what disease?
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Mononucleosis
(Heterophile-negative) |
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List the populations at risk with CMV infections. x7
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Fetus
Neonates / Young children Sexually active Pregnant Immunocompromised Blood product recipient Health care workers |
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Describe the transmission of HCMV in fetuses.
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Intrauterine transmission
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What poses the greatest risk of CMV to fetuses?
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Primary infection of seronegative mothers
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What is associated with the MOST severe CMV disease?
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Intrauterine infection
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If an immune pregnant mothers had a CMV infection, what symptoms would the new-born baby manifest?
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Asymptomatic
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Describe how neonates/young children become CMV infected:
- perinatally - postnatally |
Birth
Breast-feeding |
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Prior to conception, 45% - 91% of pregnant women are what?
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CMV seropositive
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What puts pregnant others at risk? x2
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Contact with young children <24 months of age.
Going to day care centers |
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Sexually active populations are at risk b/c HCMV can be found and shed from where? x2
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Cervix
Semen |
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List the involvement of HCMV in two types of immunocompromised patients.
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In transplant patients, all major transplantations are associated with an increased risk of this infection or this disease.
It is one of the most common opportunistic infections in AIDS patients. |
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What percent of transplant patients show signs of HCMV infection?
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50%
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100% of homosexual men with HCMV are also co-infected with what?
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HIV-1
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CMV infections associated with recipients of blood products are also associated with these two diseases.
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Postperfusion syndrome
Transfusion Associated disease |
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What are three possible outcomes of someone who becomes seropositive with HCMV following a blood transfusion.
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Asymptomatic
Posttransfusion CMV Mononucleosis CMV hepatitis |
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For immunocompetent individuals, describe the pathogenicity of CMV.
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Low pathogenicity.
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What 2 things about the patient affects the pathogenesis profoundly?
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Age
Immune status |
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Primary infection during what time for the pregnant mother would most likely cause in utero infection?
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First six months of pregnancy
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Majority of congenital infections are symptomatic of what?
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Asymptomatic
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For babies with congenital infection, 80% of symptomatic infants exhibit what?
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lasting neurological abnormalities
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Neonates with full CID (Cytomegalic Inclusion Disease) exhibit what 3 most common symptoms?
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Jaundice
Petechiae Hepatosplenomegaly |
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What is the worst case scenario for neonates with full CID in terms of symptoms?
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End stage organ disease
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What is the radiographical evidence supporting the diagnosis of a CMV congenital infection?
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Paraventrical calcification
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What are the symptoms associated with perinatal CMV infection?
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Usually asymptomatic
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What are some ways that perinatal CMV infection can occur? x4
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Delivery
Breast milk consumption Blood transfusion Nursery spread |
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50% of infants born to mothers with this condition will acquire HCMV.
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Cervical infection
|
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Childhood CMV infection:
- prevalence - symptoms |
Common
Asymptomatic |
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CMV mononucleosis:
- severity - limitation |
Mild
Self-limiting |
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CMV mononucleosis symptoms. x7
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Fever
Malaise Rash Tonsilitis Abnormal liver functions Lymphadenopathy Leukocytosis |
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What antibody difference exists with CMV and EBV mononucleosis?
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CMV is heterophil-negative
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In terms of Cardiovascular Diseases, HCMV seropositivity correlates with what medical conditions? x3
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RESTONOSIS following balloon angioplasty
more severe ATHEROSCLEROTIC symptoms TRANSPLANT VASCULAR SCLEROSIS |
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In CVDs, HCMV antigens and nucleic acid sequences have been demonstrated in what tissues?
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Smooth muscle cells
Endothelial cells Monocytes/macrophages |
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What percentage of individuals with AIDS are seropositive for CMV?
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>90%
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What are the 2 arguments supporting the fact that HCMV may contribute to AIDS progression?
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1. CMV is able to infect the same cell type as HIV.
2. CMV has genes that are capa ble of increasing the expression of long terminal repeat regions of HIV. |
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With HIV-infected patients living longer, what is the consequence to HCMV's?
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HCMV induced diseases in these patients may rise as the virus acquires various drug resistance.
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What would a fundoscopic exam reveal for a person with HCMV retinitis?
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Retinal necrosis
Hemorrhage |
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What is the MOST important infectious agent affecting organ transplantation?
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CMV
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T/F - HCMV diseases varies with each type of transplantation.
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True
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The severity of end-organ disease is related to severity of what?
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immunosuppression
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What status can affects the outcome of transplantations?
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CMV Seropositivity
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What is the most common life-threatening complication of allogeneic bone marrow transplant? x4
What are the symptoms? |
Interstitial pneumonia
Fever NON-productive cough Dyspnea Hypoxia |
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CMV is the most common pathogen isolated from what?
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Solid organ transplantation
|
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What is the leading cause of morbidity during the first 14 weeks after liver transplantation?
What are the symptoms? x3 |
Hepatitis
Elevated liver enzymes Liver failure Fever |
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CMV morbidity lowest in what type of transplant?
What are the symptoms? x4 Are antivirals helful to CMV kidney transplant infections? |
Kidney
Fever Malaise Leukopenia Hepatosplenomegaly Yes, well responding |
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CMV should be suspected in? x3
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Newborns with microencephaly, jaundice, hepatosplenomegaly
Mononucleosis syndrome with heterophil antibody negative Immunocompromised |
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T/F - CMV infections can be diagnosed on clinical manifestations alone.
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False
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What is the most DEFINITIVE lab diagnosis for HCMV?
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Tissue CULTURE
(isolate virus from body secretions or tissue homogenates) |
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Besides the definitive lab technique in diagnosing HCMV, what other alternative lab methods are there for diagnosis?
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1. Viral marker by Immunofluorescence, ELISA, or EM (viral particles)
2. Vrius genome by DNA hybridization 3. PCR 4. Serology to detect seroconversion or rise in CMV Ab antitier (paired sera) |
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What is the positive sign seen in cultured cells for HCMV?
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HCMV inclusions known as "Owl Eye"
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What is the treatments for HCMV retinitis in AIDS patients?
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Cidofovir
Foscarnet Formivirsen |
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What is the vaccine name for HCMV?
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There is none.
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What is the treatment for Tranplant patients with AIDS? x2
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Valciclovir
Ganciclovir |
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What drug is controversial for use in treating HCMV?
When would you use this drug? |
Immune globulins (IgG)
(controversial, but warrented as immunoprophylaxis in bone marrow transplant) |