Cases reported "Dengue"

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11/62. dengue virus type 3 in Rio de Janeiro, brazil.

    dengue virus type 3 was isolated for the first time in the country as an indigenous case from a 40 year-old woman presenting signs and symptoms of a classical dengue fever in the municipality of Nova Iguacu, State of Rio de Janeiro. This serotype has been associated with dengue haemorrhagic epidemics and the information could be used to implement appropriate prevention and control measures. Virological surveillance was essential in order to detected this new serotype.
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12/62. Virologic and serologic surveillance for dengue fever in Jeddah, saudi arabia, 1994-1999.

    Dengue fever infection was first documented in Jeddah, saudi arabia, by virus isolation of dengue type 2 virus in 1994 at the virology laboratory of Dr. Soliman Fakeeh Hospital. dengue virus surveillance was established after that time. blood samples were collected from 985 patients (710 male patients and 275 female patients) with suspected cases of dengue from February 1994 to December 1999. dengue virus isolates were obtained in 207 patients (21%; 162 male patients and 45 female patients). Dengue type 2 was the predominant serotype (138 of 207 isolates, 66.7%), followed by dengue type 1 with (56 of 207 isolates, 27%) and dengue type 3 (13 of 207 isolates, 6.3%). The largest number of isolates (186 of 207 isolates, 90%) was in 1994, a year during which there was a dengue epidemic. In the next 5 years, 1995-1999, only 21 isolates (10%) were isolated. immunoglobulin m capture enzyme-linked immunosorbent assay was positive in 160 acute samples; 52 of them were from virus culture-positive cases and 108 (11%) from culture-negative cases. The total number of cases diagnosed by both methods was 315 (32%). The prevalence of dengue immunoglobulin g antibodies, as assessed on the basis of immunofluorescent assay, hemagglutination inhibition titers > or = 1/20, or both, in the acute samples was 314 (32%) of 985, indicating past flavivirus infection. Two patients died, one man with dengue hemorrhagic fever and one woman with dengue shock syndrome. Both fatal dengue cases were due to infection with type 2 virus. All other cases were simple dengue fever. To our knowledge, this is the first report confirming the circulation of 3 dengue serotypes in Jeddah.
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13/62. Perinatal dengue infection.

    We report a case of vertical transmission of dengue infection in an infant. The mother's was a term pregnancy with a history of chronic hypertension. She presented with high fever of 3 days duration 5 days prior to delivery. Her initial complete blood count showed platelet count of 64,000/mm3. Dengue hemorrhagic fever was diagnosed 2 days later and symptomatic treatment was given. During labor her platelets dropped to 11,000/mm3 and platelet concentrate was given. cesarean section was performed due to prolonged second stage of labor. Her infant was normal at birth except for petechiae on the left thigh. The child's platelet count was 34,000/mm3 and low grade fever was detected on the first day. Clinical sepsis was suspected and antibiotic treatment was started and continued for 4 days until all the cultures came back as negative. Both mother and her baby made an uneventful recovery and were discharged 6 days after delivery with normal platelet counts. Maternal blood was positive for IgM antibody to dengue virus. Both cord blood and the baby's blood were positive for dengue virus serotype 2 by PCR.
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14/62. dengue virus infection of the central nervous system (CNS): a case report from brazil.

    Dengue infection that is accompanied by unusual complications has been described in brazil. We report on the presence of dengue virus in the central nervous system (CNS) of a patient who died in 1998 in Rio Grande do Norte, northeast brazil. DEN-2 viruses were isolated from the brain liver, and lymphnode tissue of a 67-year-old man whose signs and symptoms were those of dengue infection and a secondary immune response. A postmortem revealed nose bleeds a liver that was brownish with yellow areas, and pulmonary and cerebrae congestion. Immunoperoxidase staining showed a dengue antigen-specific positive reaction in the gray matter cells of the cerebrall cortex; a granular citoplasmatic reaction was seen in the neurons. Dengue infection should always be considered as a cause encephalitis in tropical countries, especially in those where the disease is endemic.
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15/62. Isolation of dengue 2 virus from a patient with central nervous system involvement (transverse myelitis).

    A dengue fever case is described in a 58-year-old male patient with febrile illness and thrombocytopenia complicated by neurological involvement characterized by transverse myelitis followed by weakness of both legs and flaccid paralysis. muscle strength was much diminished and bilateral areflexia was observed. Dengue 2 (DEN-2) virus was isolated and the patient sero-converted by hemagglutination-inhibition and IgM-ELISA tests. The RT-PCR test was positive to DEN-2 in acute phase serum and culture supernatant, but negative in the cerebrospinal fluid. After three weeks of hospitalization the patient was discharged. No other infectious agent was detected in the blood and cerebrospinal fluid samples. The patient had full recovery from paralysis six months after the onset of DEN-2 infection.
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16/62. Isolation of dengue virus serotype 1 from the blood of a Swiss traveler prior to seroconversion.

    dengue virus serotype 1 was isolated from the blood of a patient who had returned to switzerland from brazil with fever of unknown origin. After 2 days of culture on aedes albopictus (C6/36) cell line, the dengue virus was identified as serotype 1 using a type-specific indirect immunofluorescence assay. The diagnosis was confirmed by seroconversion of anti-dengue virus-specific IgM and IgG antibodies and by amplification of a serotype 1-specific region of the dengue virus genome. This is the first description of dengue virus isolation from the blood of a traveler returning to switzerland. We recommend detection of dengue viremia during the 1st week of illness, before serological tests usually yield conclusive results, as the most efficient means of early specific diagnosis.
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17/62. A clinical, serological, and immunological study in a Japanese traveler with dengue fever.

    We describe the results of clinical, serological, and immunological studies in a Japanese traveler with dengue fever (DF). DF was confirmed by isolation of dengue virus from the serum, a positive direct reverse-transcription polymerase chain reaction (RT-PCR) test, and a high titer of anti-IgM antibody to dengue virus. Interestingly, in this patient infected by dengue virus serotype 3, we found a low CD4/CD8 ratio and a decrease in CD4 lymphocytes, a variation of cross-reaction to dengue virus serotypes 1, 2, and 4, and high serum interferon-gamma levels just after a transient elevation of interleukin-12.
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18/62. Decrease in human immunodeficiency virus type 1 load during acute dengue fever.

    Rather than the expected increase in human immunodeficiency virus type 1 (hiv-1) load, there was transient suppression of hiv-1 replication during acute dengue infection in a 29-year-old Thai woman. Acute-phase (but not convalescent-phase) serum samples obtained from an hiv-1-uninfected patient with dengue fever reduced hiv-1 infectivity, as determined by a peripheral blood mononuclear cell assay, suggesting the possibility that hiv-1 replication is suppressed during acute dengue fever, as occurs during some cases of scrub typhus infection and measles.
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19/62. Molecular characterization of dengue viruses type 1 and 2 isolated from a concurrent human infection.

    In 2001, an autochthonous case of dual viremia, resulting from naturally acquired dengue virus DEN-1 and DEN-2 infections was detected during the dengue outbreak that occurred in Barretos, a city with about 105,000 inhabitants in the North region of Sao Paulo State. Serotype identification was based on virus isolation to C6/36 mosquito cells culture and immunofluorescence assays using type-specific monoclonal antibodies. The double infection was also confirmed by reverse transcriptase polymerase chain reaction (RT-PCR). Comparative analysis of the 240-nucleotide sequences of E/NS1 gene junction region between the genome of DEN-1 and DEN-2 isolates of the corresponding reference Nauru and PR 159S1 strains, respectively, showed some nucleotide differences, mainly silent mutations in the third codon position. Results of maximum likelihood phylogenetic analysis of E/NS1 gene sequences indicated that both genotypes of DEN-1 and DEN-2 viruses recovered from double infection in Barretos belonged to genotypes I and III, respectively.
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20/62. Vertical transmission of dengue infection in Thai infants: two case reports.

    Dengue infection is hyperendemic in tropical countries especially in thailand. Most dengue infections occur during childhood but some adults may remain susceptible to infection. About 30 per cent of dengue infection are reported in patients > 15 years old. Some pregnant women may also be susceptible to dengue and if they experience dengue infection, they can transmit the dengue viruses to their babies. The authors report two babies who developed mild dengue illness, dengue hemorrhagic fever (DHF) grade II, beginning on their 6th day of life. Both of them had low grade fever, hepatomegaly and generalized petechial rash. The first baby had Hct ranging from 46 to 40 per cent with minimal right pleural effusion. The lowest platelet count was 19,000 cells/mm3. His mother had dengue shock syndrome with masssive post partum bleeding. The second baby had dengue 2 infection while his mother had dengue fever. His Hct had also risen from 52 per cent to 61 per cent with right pleural effusion. His lowest platelet count was 7,000 cells/mm3. Both mothers and their babies had a complete recovery although the first baby had prolonged thrombocytopenia for two months.
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