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PubMed1999

Enterovirus 71 from fatal and nonfatal cases of hand, foot and mouth disease epidemics in Malaysia, Japan and Taiwan in 1997-1998.

Enterovirus 71 (EV71), one of the major causative agents for hand, foot and mouth disease (HFMD), is sometimes associated with severe central nervous system diseases. In 1997, in Malaysia and Japan, and in 1998 in Taiwan, there were HFMD epidemics involving sudden deaths among young children, and EV71 was isolated from the HFMD patients, including the fatal cases. The nucleotide sequences of each EV71 isolate were determined and compared by phylogenetical analysis. EV71 strains from previously reported epidemics belonged to genotype A-1, while those from recent epidemics could be divided into two genotypes, A-2 and B. In Malaysia, genotype A-2 was more prevalent, while in Japan and Taiwan, B genotype was more prevalent. Two isolates from fatal cases in Malaysia and one isolate from a fatal case in Japan were genotype A-2. However, all isolates from three fatal cases in Taiwan belonged to genotype B. The severity of the HFMD did not link directly to certain genotypes of EV71.

DNA Primers↗

PubMed1987

A comparative study of alteration in lymphocyte subsets among varicella, hand-foot-and-mouth disease, scarlet fever, measles, and Kawasaki disease.

Changes in the lymphocyte subsets of 13 patients with varicella, 5 with hand-foot-and-mouth disease, 4 with scarlet fever, 10 with measles and 20 with Kawasaki disease were examined by immunofluorescent flow cytometric analysis using monoclonal antibodies against lymphocyte cell surface antigens. The results were compared with those of age-matched normal controls. A significant increase in the percentage of Leu-2a positive (Leu-2a+) cells was shown during the early convalescence of varicella, scarlet fever and measles. A significant decrease in the percentage of Leu-3a+ cells during the acute phase was common to all the diseases examined, and a significant decrease of Leu-4+ cells was observed except in measles. As a result, a significant decrease in the Leu-3a+/Leu-2a+ ratio was common to all the diseases examined during the acute and/or early convalescent phases. Leu-M3+ cells increased significantly in varicella, scarlet fever, and Kawasaki disease. HLA-DR+ cells increased significantly in varicella and Kawasaki disease. No significant changes in the proportions of Leu-7+, Leu-10+, and 2H7+ cells were found throughout the course of all the diseases examined.

Adolescent↗

PubMed2006

Genetic diversity of enterovirus 71 associated with hand, foot and mouth disease epidemics in Japan from 1983 to 2003.

BACKGROUND: Enterovirus 71 (EV71) is one of the major etiologic agents of hand, foot and mouth disease (HFMD). The surveillance data indicate that EV71 infection follows an epidemic mode of transmission, causing large outbreaks and then becoming quiescent for a few years. METHODS: We investigated the genetic diversity of a total of 121 EV71 strains isolated from patients with HFMD in Fukushima, Japan, from 1983 to 2003 and compared their genetic relation with the 164 EV71 strains isolated in the world using phylogenetic analysis based on the VP4 sequence. RESULTS: We observed EV71-related HFMD outbreaks in Fukushima in 1984, 1987, 1990, 1993, 1997, 2000 and 2003. Phylogenetic reconstruction of EV71 strains isolated in Fukushima demonstrated 8 genetically distinct clusters, including 6 subgroups previously designated as B-1, B-2 and 3, B-4, C-1, C-2, and C-3 and 2 subgroups newly designated as B-5 and C-4. Additional 2 indistinct clusters belonged to genogroup C and were named C-U1 and C-U2. Of those subgroups, B-1, C-U1, C-U2, C-2, B4, and C-4 and B-5 dominantly related to epidemics that occurred in the years 1984, 1987 and 1990, 1993, 1997, 2000 and 2003, respectively. EV71 strains derived from each outbreak in Fukushima formed a single cluster with those isolated during almost the same time period in other area of Japan and in other countries. CONCLUSIONS: Our results suggested that the repeated EV71 outbreaks might be the result of the worldwide transmission of the newly introduced genetically divergent EV71 strains.

Cluster Analysis↗

PubMed1980

Outbreaks of hand, foot, and mouth disease by enterovirus 71. High incidence of complication disorders of central nervous system.

In Japan we have had two outbreaks of hand, foot, and mouth disease associated with disorders of the central nervous system, one in 1973 and the other in 1978. The isolated virus in both outbreaks was enterovirus 71. Central nervous system disorders were present in 24% of patients in 1973 and in 8% of patients in 1978. These disorders were localised encephalitis with cerebellar signs as the main feature, aseptic meningitis, and polio-like paresis. The enterovirus 71 isolated in Japan had strong dermatotropic as well as neurotropic tendencies. However in cross-neutralisation tests, no difference in antigenicity from the prototype, BrCr strain, was recognised.

Adolescent↗

PubMed1999

Molecular detection of enteroviruses from an outbreak of hand, foot and mouth disease in Malaysia in 1997.

Enterovirus 5'UTR sequences were detected by RT-PCR in 22 out of 47 suspected hand, foot and mouth disease (HFMD) patients during an outbreak of the disease with incidences of fatal brainstem encephalomyelitis in Malaysia in 1997. Genetic and phylogenetic analyses of the isolates 5'UTR sequences suggest the presence of predominantly enteroviruses with high sequence similarities to Echovirus 1 and Coxsackievirus A9 in the Malaysian peninsula. No fatal cases, however, were associated with these isolates. The remaining isolates, including all (4/4) isolates of the fatal cases from the Malaysian peninsula and Sarawak shared very high sequence identity with enterovirus 71MS (EV71). These findings suggest that several enteroviruses were circulating in Malaysia during the outbreak period, with only EV71 causing fatal infections.

Base Sequence↗

PubMed2002

Direct detection of enterovirus 71 (EV71) in clinical specimens from a hand, foot, and mouth disease outbreak in Singapore by reverse transcription-PCR with universal enterovirus and EV71-specific primers.

A recent outbreak of hand, foot, and mouth disease in Singapore in 2000 affected several thousand children and resulted in four deaths. The aim of this study was to determine the applicability of reverse transcription-PCR (RT-PCR) with universal pan-enterovirus primers and enterovirus 71 (EV71) type-specific primers for the direct detection of enteroviruses in clinical specimens derived from this outbreak. With the universal primers, EV71 RNA sequences were successfully detected by RT-PCR and direct sequencing in 71% of positive specimens. Three pairs of EV71 type-specific primers were evaluated for rapid detection of EV71 directly from clinical specimens and cell culture isolates. By using a seminested RT-PCR strategy, specific identification of EV71 sequences directly in clinical specimens was achieved, with a detection rate of 53%. In contrast, cell culture could isolate EV71 in only 20% of positive specimens. EV71 was detected directly from brain, heart, and lung specimens of two deceased siblings. Although more than one type of enterovirus was identified in clinical specimens from this outbreak, 90% of the enteroviruses were confirmed as EV71. The data demonstrate the clinical applicability of pan-enterovirus and seminested RT-PCR for the detection of EV71 RNA directly from clinical specimens in an outbreak situation.

Child↗

PubMed2003

Genetic diversity of enterovirus 71 isolated from cases of hand, foot and mouth disease in Yokohama City between 1982 and 2000.

Enterovirus 71 (EV71) is known as one of the major causative agents of hand, foot and mouse disease (HFMD) and is also associated with neurological manifestations such as aseptic meningitis, polio-like paralysis and encephalitis. Recently, large HFMD outbreaks, involving severe neurological complications, have been experienced in Malaysia, Taiwan and some other countries in the Western-Pacific region. To investigate the genetic diversity of EV71 isolates in a single community in Japan, nucleotide sequences of the VP4 region of 52 EV71 isolates in Yokohama City from 1982 to 2000 were determined and the phylogenetic relationship was compared with other referential EV71 strains in Japan and in the world. There were two major genotypes of EV71 in Yokohama City through the 1980's and 1990's. Six EV71 isolates in the early 1980's in Yokohama City were closely related to those from HFMD outbreaks in Japan and from outbreaks of polio-like paralysis in Europe in the 1970's. During recent HFMD outbreaks in 1997 and 2000, two distinct genotypes of EV71 were co-circulating in Yokohama City as in HFMD outbreaks in Malaysia and Taiwan. However, the genetic diversity of EV71 in Yokohama City was not directly correlated with the severity of HFMD. The results confirmed the circulation of two distinct genotypes of EV71 over the past 20 years in Japan.

Amino Acid Sequence↗

PubMed1999

Isolation of subgenus B adenovirus during a fatal outbreak of enterovirus 71-associated hand, foot, and mouth disease in Sibu, Sarawak.

BACKGROUND: In mid-1997, several children died in Sarawak, Malaysia, during an epidemic of enterovirus-71 (EV71) hand, foot, and mouth disease. The children who died had a febrile illness that rapidly progressed to cardiopulmonary failure and the cause was not satisfactorily resolved. We describe the isolation and identification of a subgenus B adenovirus from the children who died. METHODS: We studied two groups of children presenting to Sibu Hospital from April 14 to Sept 30, 1997. For children who died, the inclusion criterion was death after febrile illness, and for those who did not die it was acute flaccid paralysis (AFP). Serum and cerebrospinal fluid samples were tested for IgM antibodies to Japanese encephalitis and dengue viruses. Viruses isolated were identified by immunofluorescence, reverse-transcriptase PCR, or PCR and DNA sequencing. FINDINGS: Enterovirus was isolated in three (19%) of 16 children who died and in none of the eight surviving children with AFP. However, an agent that was initially difficult to identify was found in ten (63%) children who died and five (63%) surviving children who had AFP. The agents isolated from ten (66.7%) of these 15 children were eventually identified as adenoviruses and were isolated mainly from clinically important sterile sites or tissues. All the enterovirus-positive children who died had this second agent. INTERPRETATION: Our data raises doubts that EV71 was the only aetiological agent in these deaths.

Adenoviridae↗

PubMed2002

Risk factors of enterovirus 71 infection and associated hand, foot, and mouth disease/herpangina in children during an epidemic in Taiwan.

OBJECTIVE: In 1998, an enterovirus 71 (EV71) epidemic in Taiwan was associated with hand, foot, and mouth disease (HFMD)/herpangina and involved 78 fatal cases. We measured EV71 seroprevalence rates before and after the epidemic and investigated risk factors associated with EV71 infection and illness. METHODS: Neutralizing antibodies to EV71 were assayed for 539 people before the epidemic and 4619 people of similar ages after the epidemic. Questionnaires, which were completed during household interviews after the epidemic, solicited demographic variables, exposure history, and clinical manifestations. RESULTS: A total of 129 106 cases of HFMD were reported during the epidemic. Age-specific pre-epidemic EV71 seroprevalence rates were inversely related to age-specific periepidemic mortality rates (r = -0.82) or severe case rates (r = -0.93). Higher postepidemic EV71 seropositive rates among children who were younger than 3 years positively correlated with higher mortality rates in different areas (r = 0.88). After the epidemic, 51 (56%) of 91 younger siblings of elder siblings who were EV71-seropositive were EV71-seropositive; otherwise, 2.2% (4 of 186) of younger siblings were EV71-seropositive (matched odds ratio [OR]: 10; 95% confidence interval [CI]: 3.4-29). Stepwise multiple logistic regression revealed other factors associated with EV71 infection to be older age (adjusted OR: 2.5; 95% CI: 1.9-3.4), attendance at kindergartens/child care centers (adjusted OR: 1.8; 95% CI: 1.3-2.5), contact with HFMD/herpangina (adjusted OR: 1.6; 95% CI: 1.2-2.1), greater number of children in a family (adjusted OR: 1.4; 95% CI: 1.1-1.7), and rural residence (adjusted OR: 1.4; 95% CI: 1.2-1.6). Twenty-nine percent of preschool children who were infected with EV71 developed HFMD/herpangina. Younger age and contact with HFMD/herpangina were significant factors for the development of EV71-related HFMD/herpangina in these children. CONCLUSIONS: An increased incidence of EV71 infection in young children occurred more often in geographic areas with increased mortality rates. Intrafamilial and kindergarten transmissions among preschool children were major modes of disease transmission during the widespread EV71 epidemic in Taiwan in 1998.

Child↗

PubMed2005

[Detection of enterovirus 71 and coxsackievirus A16 from children with hand, foot and mouth disease in Shanghai, 2002].

OBJECTIVE: It was noticed that coxsackievirus A16 (CA16) and enterovirus 71 (EV71) were two major etiological agents of hand, foot and mouth disease (HFMD) in children. Recently there were several large outbreaks of HFMD in the Asia-Pacific region, and there was a propensity to cause severe complications or death in children under 5 years of age. The severe forms were associated with EV71 infection. Although epidemics of HFMD have been reported in the mainland of China, few reports about EV71 as the pathogen of HFMD epidemics are available. The present study was conducted to investigate the causal agent of an HFMD epidemic in children in Shanghai from April to June of 2002. METHODS: Totally 102 specimens (including vesicle fluid, stool and throat swabs) were collected from 72 patients with HFMD. The specimens were inoculated into Vero and/or RD cells. At first all the isolates were respectively neutralized by the RIVM pools of enterovirus antiserum, the type-specific antisera to EV71 or to CA16. Secondly all untyped isolates were tested by RT-PCR assay with two specific primer pairs for VP1 genes of EV71 and CA16 respectively. The EV71 and CA16 were identified depending on the size of PCR products. Sequence analyses of VP1 genes of 9 virus strains were performed by the laboratory of China CDC. RESULTS: Viruses were isolated from 91 specimens from 67 patients. Serotyping by neutralization failed for all the isolates. But the RT-PCR results indicated that the viruses isolated from 78 specimens from 58 patients were identified as positive for CA16 and the isolates from 13 specimens from 9 patients were identified as positive for EV71, the ratio between CA16 and EV71 was 6.4:1. The results of sequence analyses were consistent with those of PCR assay. Two EV71 strains isolated in this study belonged to a new lineage (C4) within genogroup C. One patient with EV71-associated HFMD had a complication of encephalitis with convulsion, shock, coma and dyspnea. CONCLUSION: CA16 and EV71 were the primary causes of HFMD during the epidemic. It was the first report of EV71-associated severe encephalitis occurred in patients with HFMD in Shanghai.

Animals↗

PubMed2006

Genetic diversity of coxsackievirus A16 associated with hand, foot, and mouth disease epidemics in Japan from 1983 to 2003.

To clarify the chronologic genetic diversity of coxsackievirus A16 (CV-A16) strains associated with hand, foot, and mouth disease (HFMD) epidemics in a restricted area and their genetic relation with those isolated in other areas, we investigated the genetic diversity of the 129 CV-A16 strains associated with HFMD epidemics in Fukushima, Japan, from 1983 to 2003, and compared their genetic relation to 49 CV-A16 strains isolated in other areas of Japan and in China by using phylogenetic analysis based on the VP4 sequences. Phylogenetic reconstruction of the CV-A16 strains isolated in Fukushima from 1983 to 2003 demonstrated three distinct genetically divergent clusters related to HFMD epidemics that occurred from 1984 to 1994 (including the 1985 and 1991 outbreaks), HFMD epidemics from 1987 to 1998 (including the 1988 and 1998 outbreaks), and HFMD epidemics from 1995 to 2003 (including the 1995 and 2002 outbreaks). CV-A16 strains isolated during each period in Fukushima formed a single cluster with those isolated during essentially the same time period in other areas of Japan and in China. Our results demonstrated that prevalent CV-A16 strains causing HFMD in Fukushima, Japan, genetically changed twice during 21 epidemics, and changes were also observed in the CV-A16 strains causing HFMD epidemics in other areas. We concluded that repeated outbreaks of CV-A16-related HFMD in Japan were caused, in part, by the introduction of genetically changed CV-A16 strains, which might be transmitted overseas.

Animals↗

PubMed1997

Hand-foot syndrome induced by high-dose, short-term, continuous 5-fluorouracil infusion.

The aim of this study was to examine in detail the incidence and severity of hand-foot syndrome in advanced colorectal cancer patients receiving 5-fluorouracil (5-FU) and leucovorin (L-LV) chemotherapy. 70 advanced colorectal cancer patients (pts) were given weekly 24 h continuous 5-FU (2600 mg/m2) infusion plus L-LV (100 mg/m2 i.v., 50 mg orally). The toxicity, in particular HFS, was analysed, correlated to the main pts characteristics and compared to the other observed side-effects. HFS occurred in 36/70 pts (51%): grade 1 in 16 pts, grade 2 in 16 pts, grade 3 in 3 pts and grade 4 in 1 pt. It occurred after a median number of nine courses. In one case, chemotherapy was interrupted for this toxicity, and in another 5 pts drug reduction and/or treatment delay were undertaken. Changes in the therapeutic programme because of diarrhoea or mucositis were more frequent, even though these toxicities were generally mild in our series of pts. HFS was significantly correlated to previous exposure to chemotherapy (P = 0.00003). HFS was a frequent side-effect of high-dose, short-term continuous 5-FU infusion, but the impact on quality of life of pts and on the correct delivery of the planned chemotherapy was limited.

Adult↗

PubMedDate not supplied

Pathologic studies of fatal cases in outbreak of hand, foot, and mouth disease, Taiwan.

In 1998, an outbreak of enterovirus 71-associated hand, foot, and mouth disease occurred in Taiwan. Pathologic studies of two fatal cases with similar clinical features revealed two different causative agents, emphasizing the need for postmortem examinations and modern pathologic techniques in an outbreak investigation.

Disease Outbreaks↗

PubMed1998

Deaths among children during an outbreak of hand, foot, and mouth disease--Taiwan, Republic of China, April-July 1998.

During April-July 1998, the Ministry of Health in Taiwan received approximately 90,000 reports of hand, foot, and mouth disease (HFMD) among young children based on passive surveillance from sentinel physicians. Approximately 320 children have been hospitalized with HFMD associated with suspected meningitis, encephalitis, or acute flaccid paralysis (AFP), and at least 55 have died. This report describes the clinical course of two fatal cases and presents summary findings from an ongoing clinical, epidemiologic, and laboratory investigation of the 55 deaths.

Child↗

PubMed2002

The hand, foot and mouth disease virus capsid: sequence analysis and prediction of antigenic sites from homology modelling.

Enterovirus 71 (EV71) is the most common aetiological agent detected in cases of hand, foot and mouth disease (HFMD) resulting in incidences of neurological complications and fatality in recent years. A comparison of the capsid proteins implicated in the pathogenicity of the fatal and non-fatal strains of EV71, reveals a high degree of homology (93%-100% identity). To facilitate diagnostic immunoassays and vaccine development, a consensus structural model for the EV71 coat protein has been developed based primarily on the homologous structure of the bovine enterovirus. The overall architecture of the virion closely resembles those of related icosahedral picornaviruses. Detailed atomic modelling of the fatal 5865/SIN/00009 strain has been carried out, and the functional regions (known and predicted) from closely related viruses mapped onto the surface of the predicted structure. From the model, we have identified two putative immunogenic regions, one of which is unique to EV71. The hydrophobic pocket within VP1, found in bovine enterovirus, poliovirus and rhinovirus, is also conserved in EV71.

Amino Acid Sequence↗

PubMed2001

[Genetic diagnosis and molecular epidemiological analyses of hand, foot and mouth disease which prevailed in Osaka Prefecture in 2000].

Direct rapid genetic diagnosis by RT-PCR as well as virus isolation was performed on the 122 patients with hand, foot and mouth disease (HFMD) in Osaka Prefecture in 2000, followed by molecular epidemiological analyses of the isolated viruses. MRC-5 cells showed the highest sensitivity for virus isolation, recovering 59 strains of viruses from 80 virus-positive patients. By RT-PCR using newly designed primers spanning VP4 and VP2, corresponding genome regions of coxsackievirus type A16 (CA16) and enterovirus 71 (EV71) isolates were amplified only with primers specific to respective viruses. On the other hand, none of the genomes of prototype enteroviruses of other 49 serotypes were detected with these primers. From the sequence analyses, all of the 22 isolates of CA16 belonged to the same genotype and 33 isolates of EV71 were classified into two genetic groups. The results showed that 3 different genotypes of viruses were prevailing in the epidemic of HFMD in Osaka Prefecture in 2000.

Enterovirus↗

PubMed1975

Hand, foot and mouth disease associated with coxsackievirus group B.

This study from Frankfurt, although similar to other reports with respect to clinical findings, presents further evidence of a varied etiology for hand, foot and mouth disease (HFMD). Of the 6 patients with HFMD, 5 ahd virologic evidence of coxsackievirus B5 infection, and 1 had definite evidence of coxsackievirus B2 infection. Our data suggest an etiologic association of coxsackievirus group B with HFMD.

Antibodies, Viral↗

PubMed1993

The hand-foot-genital syndrome: on the variable expression in affected males.

In this report we document male-to-male transmission in the hand-foot-genital syndrome. An affected father transmitted the syndrome to his three sons. A grade IV hypospadias, which was the most severe genital anomaly in affected males, was present in the youngest, moderately mentally retarded microcephalic male sibling.

Abnormalities, Multiple↗