Parvovirus B19

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Par·vo·vi·rus B19

a single-stranded DNA virus belonging to the family Parvoviridae; the cause of erythema infectiosum (fifth disease) and aplastic crises.

Parvovirus B19 was first isolated in 1975 from a specimen of healthy donor blood. In 1983 it was linked to erythema infectiosum, also called fifth disease, a generally benign febrile exanthem of children. Parvovirus B19 infection occurs worldwide and can attack people of any age. It is most often contracted in childhood; 30-60% of adults have protective IgG antibody to the virus. Infection is asymptomatic in 20-50% of people who acquire it. Transmission is usually by respiratory secretions. The virus replicates in bone marrow. Classical erythema infectiosum typically occurs in children 4-15 years of age. Sporadic outbreaks are common, and the peak incidence is during the winter and spring. After an incubation period of 4-14 days, the child develops prodromal symptoms, usually mild, consisting of headache, fever, chills, joint pains, and malaise. About 1 week later, a bright red "slapped cheek" rash appears on the face, and during the next 3-4 days the rash spreads to the rest of the body (proximal extremities, then trunk and distal extremities, including palms and soles), where it has a reticular or maculopapular appearance. Itching, if any, is slight. The rash is an immune response, heralding the appearance of IgM antibody and the end of the period of communicability. The disease typically runs a benign course, and treatment is purely symptomatic. (Like certain other viruses, parvovirus B19 also occasionally causes a benign exanthem known as papular-purpuric gloves-and-socks syndrome.) Infection in adults follows a different pattern: the "slapped cheek" appearance does not occur and the rash on the trunk and limbs tends to be milder and more subtle, but 15-20% of adult patients, virtually all women, develop significant joint involvement. Deposition of immune complexes in joint membranes leads to sudden onset of symmetric polyarthritis, with or without swelling, affecting particularly the metacarpophalangeal and proximal interphalangeal joints, the wrists, and the knees. Pain and disability can be severe, and symptoms can persist for weeks or months, but eventual spontaneous resolution is the rule. Because parvovirus B19 infects the bone marrow, most patients experience a transient decline in red blood cells (RBC), white blood cells (WBC), and platelets. Generally this is of no consequence, but occasionally it progresses to a transient aplastic crisis, in which RBC production virtually stops and the RBC count falls rapidly. The risk of this complication is much greater in conjunction with sickle cell anemia, autoimmune hemolytic anemias, immunodeficiency, and pregnancy. With the formation of IgG antibody by the immune system, RBC production resumes and the anemia resolves. In patients with congenital or acquired immune deficiency, however, failure to form antibody can lead to prolonged anemia. Infection in a pregnant woman has about a one-in-three chance of being passed to the fetus and inducing a fetal aplastic crisis. This in turn can result in congestive heart failure and fetal hydrops. Spontaneous recovery is typical, but fetal death occurs in as many as 10% of cases. Fetal infection with parvovirus B19 apparently does not cause congenital anomalies. Acute parvovirus B19 infection can be confirmed by a rapid rise and fall of IgM antibody. Diagnosis can also be established by culturing the virus from bone marrow or by ELISA detection of the antigen in serum. The treatment of all forms of parvovirus B19 infection is purely symptomatic and supportive. Hospitalized patients with parvovirus B19 are isolated, and pregnant workers are advised to avoid contact with them. Severe anemia may require blood transfusions. When prolonged anemia results from inability to form IgM antibody, intravenous immune globulin may help.

Farlex Partner Medical Dictionary © Farlex 2012

Par·vo·vi·rus B19

A single-stranded DNA virus belonging to the family Parvoviridae; the cause of erythema infectiosum (fifth disease) and aplastic crises.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


(par?vo-vi'rus) [ parvo- + virus]
Any of a group of viruses similar to adeno-associated viruses. They are pathogenic in animals and humans.

parvovirus B19

See: erythrovirus B19
Medical Dictionary, © 2009 Farlex and Partners

Patient discussion about Parvovirus B19

Q. fifth month of pregnancy... Hey guys, as always, just wanted to let you know my wife and I are getting into fifth. so far doing good and we have some news.......... we're gonna have a girl!!! I'm so happy.... now the name is actually the problem... is true that orange is the new pink??

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References in periodicals archive ?
Uthman and Gharavi showed that anticardiolipin antibodies and lupus anticoagulant were associated with viral infections such as hepatitis C virus, EBV, CMV, and parvovirus B19 [14].
[5] Nonstandard abbreviations: cfDNA, cell-free DNA; cfRNA, cell-free RNA; B19V, human parvovirus B19 virus; rRNA, ribosomal RNA.
Epidemiology of human parvovirus B19 in children with sickle cell disease.
Identification and genetic diversity of two human parvovirus B19 genotype 3 subtypes.
Zhang, "Acute fulminant hepatitis with bone marrow failure in an adult due to parvovirus B19 infection," Hepatology, vol.
(11) A clinical history of a flulike viral prodrome can be suggestive of lymphocytic myocarditis, as most cases arise owing to infection with a viral agent such as coxsackievirus B, adenovirus, or parvovirus B19 (Table).
The mother should have been referred to a perinatologist or other maternal-fetal specialist when blood work was positive for parvovirus B19. A specialist could have provided treatment for the virus.
pBHA containing parvovirus B19 VP1 gene was used as a template for PCR amplification of 167 bp chimeric fragment using specific designed primers.
Parvovirus B19 is a non-enveloped icosahedra single stranded DNA virus, infecting human with a wide spectrum of clinical presentations.
The incriminated infectious agents reported to date are rubella, Echovirus 7, mumps, cytomegalovirus, parainfluenza, coxsackievirus, adenovirus, influenza A, human herpes virus 6, hepatitis B, parvovirus B19, Epstein-Barr virus, Yersinia enterocolitica, Chlamydophila pneumoniae, Mycoplasma pneumoniae, Brucella abortus, and Borrelia burgdorferi.