Japan - Dengue outbreak in Japan, first since 1945

[Gert van der Hoek]

See also: AUTOCHTHONOUS DENGUE VIRUS INFECTION IN JAPAN IMPORTED INTO GERMANY, SEPTEMBER 2013

In Japan, Ae. albopictus is well established and distributed widely, with its northern limits on Honshu Island between latitude 38 ° to 40 ° north [13]. Moreover, Ae. aegypti is also invasive in Japan and was detected during entomological surveillance at Tokyo Narita International Airport in 2012 [14] - Eurosurveillance

Japan sees 1st dengue fever case in nearly 70 years

AUG. 27, 2014

TOKYO — Japanese health authorities have reported the first locally transmitted case of dengue fever in the country in nearly 70 years.

The ministry said the case occurred in Saitama Prefecture. Local media reports said the patient was a teenage girl who has since recovered.

Government spokesman Yoshihide Suga, in confirming the report, said Wednesday that the news was not cause for alarm because the illness is not transmitted directly from person to person.

Japan sees dozens of imported cases of dengue fever each year, mostly tourists who catch the illness while traveling in tropical regions. The disease, which is transmitted by mosquito, was common in Japan during World War II but was locally eradicated for decades.

Japan Today

Saitama Prefecture
Bordering Tokyo Metropolitan Area


JMA

[Gert van der Hoek]

Re: Japan sees 1st locally transmitted dengue fever case in nearly 70 years

Retrospective search for dengue vector mosquito Aedes albopictus in areas visited by a German traveler who contracted dengue in Japan

DOI: 10.1016/j.ijid.2014.06.005 -

International Journal of Infectious Diseases

Volume 26, September 2014, Pages 135?137

Highlights
? We evaluated the risk of autochthonous DENV transmission in Japan.
? We performed a retrospective search of the areas visited by the traveler patient.
? We determined the population density of dengue vector mosquito, Aedes albopictus.
? The temperatures of the visited areas are suitable for the inhabitation of the mosquito.
? The population density of Ae. albopictus has been shown to be high in the urban areas.

Summary
A German traveler developed dengue fever in late August 2013, following a direct flight from Germany. Autochthonous dengue virus (DENV) infection has not been reported in Japan. To evaluate the risk of autochthonous DENV transmission in Japan, the authors performed a retrospective search of the five areas visited by the German patient to determine the population density of dengue vector mosquito, Aedes albopictus. The annual mean temperature of each area was higher than 12 ?C, which is considered suitable for the establishment of A. albopictus populations. Our retrospective search revealed the population density of A. albopictus to be high in the urban areas of Japan.

Link to full article

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[Shiloh]

Re: Japan sees 1st locally transmitted dengue fever case in nearly 70 years

Source: http://www.japantimes.co.jp/news/201.../#.U_8jekhpehc

Two more contract dengue; Tokyo park suspected
Kyodo
Aug 28, 2014

Two more people were reported to have contracted dengue fever in Japan on Thursday, a day after the government said it had confirmed the first local infection of the disease in nearly 70 years.

A man in Tokyo and a woman from Saitama Prefecture, both in their 20s, and the first patient ? a teenage girl also from Saitama ? go to the same school in Tokyo and are believed to have been infected after being bitten by mosquitoes in Yoyogi Park in central Tokyo...

[Gert van der Hoek]

Re: Japan sees 1st locally transmitted dengue fever case; 2 more cases reported

Dengue emerges in Japan for first time in decades


By Dennis Normile 28 August 2014

TOKYO—After reporting the country's first domestically acquired case of dengue fever in nearly 70 years yesterday, Japan's health ministry today confirmed finding two more patients.

The initial patient, a girl in her teens, had a sudden onset of high fever on 20 August and was hospitalized in Saitama City, near Tokyo.

Hospital staff, suspecting dengue, on 26 August sent blood samples to the National Institute of Infectious Diseases in Tokyo, which confirmed the diagnosis.

An epidemiological investigation turned up two more patients. All three are students at the same school in Tokyo and are members of a dance group that regularly practices in a city park, leading the ministry to conclude that students were infected in the park.

Science Mag

[Shiloh]

Re: Japan sees 1st locally transmitted dengue fever case; 2 more cases reported

Source: http://www.globalpost.com/dispatch/n...ed-dengue-feve


Kyodo News International August 31, 2014 10:46am
Another child found to have likely contracted dengue fever in Japan

A male child in Niigata Prefecture is suspected of contracting dengue fever, the prefectural government said Sunday, in possibly another case of infection within Japan.

The child, aged somewhere between 10 and 19, was hospitalized but is recovering. He is suspected of contracting the illness when bitten by a mosquito in Yoyogi Park, a major park in central Tokyo, while there on Aug. 20, according to the prefecture.

The child was in the area as part of a school event and has no record of overseas travel, the prefecture said.

A blood test by a prefectural organization showed the child had contracted the disease. The result of a test by the National Institute of Infectious Diseases is expected soon, possibly Monday...

[Ronan Kelly]

Re: Japan sees 1st locally transmitted dengue fever case; 2 more cases reported

Japan confirms 22 people affected by first dengue fever outbreak since 1945
New cases of the mosquito-borne disease reported today involve suffers believed to have fallen ill after visiting Tokyo?s Yoyogi Park, which is popular with residents and tourists.
PUBLISHED : Monday, 01 September, 2014, 12:55pm
UPDATED : Monday, 01 September, 2014, 6:06pm
Agence France-Presse in Tokyo

An outbreak of mosquito-borne dengue fever in Japan ? the first since the second world war ? has affected 22 people, the nation's health ministry confirmed on Monday.

The cases involve teenagers or people in the early 20s, who are believed to have visited Tokyo?s huge Yoyogi Park, one of the major green areas of the city, next to Meiji Shrine, which is popular with young Japanese and performance artists.
...

http://www.scmp.com/news/asia/article/1582860/japan-confirms-first-dengue-fever-outbreak-1945-may-have-affected-20

[Gert van der Hoek]

Re: Japan Dengue outbreak, first since 1945, 34 cases

Dengue fever cases jump to 34 as outbreak spreads around Japan

September 02, 2014

Health ministry officials announced on Sept. 2 that 12 more cases of dengue fever have been confirmed from mosquitoes at Tokyo's Yoyogi Park, with the outbreak spreading farther across the country.

The latest patients reside in Tokyo, Osaka, Aomori and Yamanashi prefectures. Like the 22 other cases already confirmed, the 12 individuals have not gone abroad recently, but have visited Yoyogi Park in Shibuya Ward and its vicinity.

All 12 of the latest patients are in stable condition. There is no vaccine or medicine, but proper treatment can lower the mortality rate to under 1 percent.

The 12 developed symptoms of the virus, which appear from three to 14 days after the infective bite, between Aug. 14 and Sept. 1. Seven are living in Tokyo, three in Osaka and one each in Aomori and Yamanashi.

The latest confirmation is part of the first domestic infections of the disease in about 70 years.

Health workers have been spraying Yoyogi Park for mosquitoes and draining stagnant water in an attempt to control the spread of the disease.

The Asahi Shimbun

[Gert van der Hoek]

Re: Japan Dengue outbreak, first since 1945, 36 cases

Dengue Fever Cases Rise to 36 in Japan

Tokyo, Sept. 2 (Jiji Press)--Fourteen more people in Japan have been confirmed to have dengue fever, sending the total number of cases to 36 since the first domestic case was reported last week, the health ministry said Tuesday.

The ministry believes that all 36 people from 10 prefectures were infected with the virus by mosquitos at Yoyogi Park in central Tokyo.

The 14 new sufferers, whose ages range from under 10 to over 50, all recently visited the park and have no record of recent overseas visits, according to the ministry.

All are now in stable condition after developing fevers and headaches.

Of the 14, seven are from Tokyo, three from Osaka Prefecture, and one each from the prefectures of Aomori, Niigata, Yamanashi and Ehime.

jenjiji


Mosquito traps placed in Tokyo?s Yoyogi Park to gauge dengue fever spread

SEP 2, 2014

Faced with the first domestic outbreak of dengue fever since 1945, the Tokyo Metropolitan Government on Tuesday set up mosquito traps in Yoyogi Park to gauge how many of the insects are carrying the disease.

The traps were placed in 10 locations in the park. They use light and carbon dioxide-releasing dry ice to attract mosquitoes into nets.

The trapped mosquitoes will be collected Wednesday, with the process being repeated once a week for the time being, officials said.

In an initial effort on the evening of Aug. 26 and the next morning, 35 mosquitoes were trapped but none were found to be carrying the virus that causes dengue fever.

Since the first dengue fever patients were confirmed last week, the total has risen to 36, all of whom recently spent time in Yoyogi Park or were nearby. All are currently listed in stable condition.

Japan Times

[Gert van der Hoek]

Re: Japan Dengue outbreak, first since 1945, 48 cases

Number of dengue patients up to 48

Japan Sep. 3, 2014

Japan's health ministry says it has confirmed 14 more domestic cases of dengue fever, bringing the total to 48.

The outbreak, the first in about 70 years in Japan, was first confirmed last week when 3 people were found to be infected. They had visited Tokyo's Yoyogi Park last month and were likely bitten by mosquitoes there.

The ministry says the additional 14 patients, some of whom live in Hokkaido and Ehime Prefectures, are in stable condition.

It says all 48 of those infected visited the park last month, and none has traveled abroad in the past month.

It urges people who developed fevers after being bitten by mosquitoes in the park or nearby to visit doctors immediately to check for infection.

NHK

[Gert van der Hoek]

Re: Japan Dengue outbreak, first since 1945, 49 cases

Tokyo closes part of Yoyogi Park after dengue-carrying mosquitoes found

SEP 4, 2014



The Tokyo Metropolitan Government closed part of Yoyogi Park on Thursday after confirming that mosquitoes caught in traps earlier this week were carrying the dengue virus, metropolitan officials said.

The discovery confirmed the park as the site of infections for dozens of people over the past several weeks. Four traps out of the 10 placed by metropolitan officials contained mosquitoes carrying the virus, the officials said.

Since the first domestic outbreak of dengue fever since 1945 was confirmed last week, the number of patients has risen to 49, according to the Health, Labor and Welfare Ministry.

While the patients hail from 11 different prefectures, they all had recently spent time in or near Yoyogi Park. The traps mosquito were laid Tuesday.

More: Japan Times

[Gert van der Hoek]

Re: Japan Dengue outbreak, first since 1945, 55 cases

Tokyo closes park after dengue mosquitoes found

TOKYO: Tokyo on Thursday (Sep 4) closed most of Yoyogi Park, a popular green spot in the Japanese metropolis, after dengue-carrying mosquitoes were found there, an official said. The outbreak is the first in 70 years in Japan and has so far infected 55 people, including a young model who has posed for Japanese Playboy and had been sent to the park for a photo shoot.

The disease, also called "tropical 'flu", is spread by the tiger mosquito, a species endemic to Japan. No one has so far died in Japan from the disease, which claims scores of lives every year in other, more infected parts of the world. But Japanese health officials, along with the public at large, tend to be cautious.

Last week, teams sprayed pesticide in the park to try to kill off the insect colony. They then set traps to catch the creatures and test them. Four of the 10 sites targeted found mosquitoes that were carrying the disease, indicating a large area was affected.

More: Channel News Asia

[Gert van der Hoek]

Re: Japan - Dengue outbreak in Tokyo, first since 1945, 55 cases

computertranslation

New outbreak of dengue infection in Japan

The Japanese Ministry of Health said it had identified a new case of indigenous dengue, the first that does not have its origin in the Yoyogi Park in Tokyo.

A man living in Saitama prefecture, bordering the capital, was confirmed sick Friday, but unlike the others infected, it has not recently visited Yoyogi Koen. However, he said the authorities have been bitten by mosquitoes in another garden in Tokyo, the Shinjuku Central Park (Shinjuku Chuo Koen).

The emergence of this new potential source of infection raises a concern among the population movement, while 66 other indigenous cases have been reported since last week, all on people being paraded in or near Yoyogi Park, a vast green area of the center of the capital which is now largely closed due to this virus.


7sur7

[Gert van der Hoek]

Re: Japan - Dengue outbreak in Tokyo, first since 1945, 59 cases

Dengue fever found in second Tokyo park

JIJI, KYODO

SEP 5, 2014

The health ministry said Friday it has confirmed the first case of dengue fever outside Yoyogi Park in central Tokyo, where most of the cases seem to have originated. Total infections stood at 59.

A man in his 30's in Saitama Prefecture developed symptoms last Saturday and tested positive for the rare sickness on Friday after being tested a hospital by the National Institute of Infectious Diseases.

The man, who is in stable condition, has not traveled abroad or visited Yoyogi Park recently. The ministry said it appears he was infected in nearby Shinjuku Chuo Park, where he said he was bitten by mosquitoes somewhere between Aug. 18 and 26.

The park, less than 2 km from Yoyogi Park, is also close to the Tokyo Metropolitan Government headquarters in Shinjuku Ward. Shinjuku officials checked mosquitoes in the park with experts from the institute and started disinfecting it.

Japan Times

[Shiloh]

Re: Japan - Dengue outbreak in Tokyo, first since 1945, 68 cases

Source: http://www.globalpost.com/dispatch/n...med-infections


Xinhua News Agency September 5, 2014 7:23am
Dengue fever spreads further in Japan, 68 confirmed infections

TOKYO, Sept. 5 (Xinhua) -- The Japanese Health Ministry found mosquitoes carrying dengue fever virus at another park in central Tokyo Friday, while the number of people confirmed to have the disease has increased to 68...

[Shiloh]

Re: Japan - Dengue outbreak in Tokyo, first since 1945, 74 cases

Source: http://www.japantimes.co.jp/news/201.../#.VAr9Kkhpehc

Dengue spreads beyond two Tokyo parks; tally at 74
Kyodo
Sep 6, 2014


Evidence emerged Saturday that dengue fever is spreading throughout the capital after an infected Tokyo man said he hadn?t recently visited either of the parks so far linked to the virus, and the case tally grew overnight to 74.

The man, in his 60s, said he did not recently visit either Yoyogi Park or Shinjuku Chuo Park, the two hot spots identified as having mosquitoes carrying the virus, the health ministry said.

The others infected said they had spent time in or near Yoyogi Park, except for a Saitama man identified Friday who said he was bitten by mosquitoes in Shinjuku Chuo Park, west of Shinjuku Station and just north of Yoyogi...