Search

The aim of the present study was to identify the rubella virus (RV) and enterovirus (EV) genotypes detected during the Epidemiological Surveillance on Exanthematic Febrile Diseases (VIGIFEX) study and to perform phylogenetic analysis. Ten RV- and four EV-positive oropharyngeal samples isolated from cell culture were subjected to RT-PCR and sequencing. Genotype 1G and echovirus 9 (E-9) was identified in RV- and EV-positive samples, respectively. The RV 1G genotype has been persisting in Brazil since 2000-2001. No evidence of E-9 being involved in exanthematic illness in Brazil has been reported previously. Differential laboratory diagnosis is essential for management of rash and fever disease.

Involvement of the central nervous system is common in measles, but rare in rubella. However, rubella virus (RV) can cause a variety of central nervous system syndromes, including meningitis, encephalitis, Guillain-Barré syndrome and sub acute sclerosing panencephalitis. We report the occurrence of one fatal case of the encephalitis associated with measles-rubella (MR) vaccine during an immunization campaign in São Paulo, Brazil. A 31 year-old-man, previously in good health, was admitted at emergency room, with confusion, agitation, inability to stand and hold his head up. Ten days prior to admission, he was vaccinated with combined MR vaccine (Serum Institute of India) and three days later he developed 'flu-like' illness with fever, myalgia and headache. Results of clinical and laboratory exams were consistent with a pattern of viral encephalitis. During hospitalization, his condition deteriorated rapidly with tetraplegia and progression to coma. On the 3rd day of hospitalization he died. Histopathology confirmed encephalitis and immunohistochemistry was positive for RV on brain tissue. RV was also detected by qPCR and virus isolation in cerebrospinal fluid, brain and other clinical samples. The sequence obtained from the isolated virus was identical to that of the RA 27/3 vaccine strain., (Copyright © 2013 Elsevier B.V. All rights reserved.)

Acute liver failure is a syndrome with a wide range of etiologic possibilities in children, but in up to 50% of the cases in the literature no diagnosis is established. This case report adds rubella virus to the list of possible causes of acute liver failure. This association was made by serologic, cell culture, molecular, histopathologic, and immunohistochemical methods.

Sixty pregnant women with clinical signs of rubella and specific rubella antibodies were studied between January 1999 and December 2002 in order to determine the intrauterine rubella transmission rate and the presence of the virus in amniotic fluid and fetal tissues by nested PCR. Thirty-three patients presented rubella before 12 weeks of gestation and 27 after 12 weeks. Gestational age at the time of acute rubella was determined on the basis of the date of last menstruation and the first trimester ultrasound scan. Thirteen patients with clinical features of rubella before 12 weeks of gestation were submitted to amniocentesis. Three products of conception were analyzed. The presence of the rubella virus was determined by nested PCR. IgM and IgG antibodies were analyzed in neonatal samples at birth and at 3 months of age using a capture immunoassay. Newborn follow-up was based on the presence of congenital rubella syndrome-compatible defects, anti-rubella antibodies, echocardiographic alterations, brainstem evoked response audiometry, and ophthalmological pathology. Five miscarriages and four fetal deaths were observed in the group of patients presenting clinical features before 12 weeks of gestation. IgM antibodies were detected in seven neonates at birth and at 3 months of age. Deafness was observed in three cases and pigmentary retinopathy in one case. Fourteen of the 16 samples (13 amniotic fluid and 3 fetal tissue samples) submitted to virological analysis tested positive. Four fetal deaths, five miscarriages (one with negative virology) and seven newborns with anti-rubella IgM at birth and/or at 3 months age were observed in the group with rubella before 12 weeks of gestation. There were three cases in which virological analysis of the amniotic fluid samples was positive (infected) while the newborn showed no signs of congenital rubella syndrome and anti-rubella IgM were absent. When maternal rubella occurred after 12 weeks of gestation, no fetal or neonatal rubella signs were observed. Eradication of congenital rubella syndrome is possible since vaccination campaigns continue and all services related to the health care of children, adolescents and women have become aware of the significance of the problem and are collaborating. All pregnant women in Brazil should be screened for the rubella antibody and the susceptible group should be vaccinated after giving birth.