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West Nile virus test results such as mosquito, crow in Yokohama-shi

Last update date May 29, 2019

The collection daily payment West Nile virus test result report of mosquito

The West Nile fever is prevalent in the United States, and infected person (dead person) from 2002 through 2005 is 4,156 people (284), 9,862 people (264), 2,539 people (100), 3,000 people (119). In Japan, man in his 30s who returned home from the United States in September, 2005 had a diagnosis of West Nile temperature for the first time in the country. It is thought that patient was infected before returning home. This virus is transmitted among [chicken ⇔ mosquito ⇒ person], but people may not become the source of infection.

There is regionality to hold facility relevant to foreign countries such as port or the U.S. forces facility, and Yokohama-shi carries out surveillance business of mosquito and birds (crow) in the city from 2003. We set up trap (trap) capturing mosquito regularly in park in the city and check genetic having West Nile virus (WNV) or not by the PCR method in Yokohama City Inst. of Health.

We will tell about test result that carried out examination of West Nile virus (the PCR method) about mosquito which we gathered in Yokohama-shi.

As for the detailed information of laboratory procedure, please see laboratory procedure (PDF: 12KB) of West Nile virus from crow and mosquito.

West Nile virus test result reports such as crows

We will tell about test result when we carried out examination of West Nile virus (the PCR method) about crows which died in Yokohama-shi in Yokohama City Inst. of Health in this column.

* Two Naka Ward (June 14), Seya Ward one (June 30), four of them of one Kanazawa Ward (July 5) in total were carried in, and all the gene of WNV was with negative inspection of crow until July 5, 2006.

* Three pigeons (June 8: exceptionally correspondence) and crow one (June 17) carried in in 2005, and one crow (June 17) which died after it was protected was carried in in Nogeyama Zoo again. About examination of West Nile virus (the PCR method), it was all-negative.

* About examination of West Nile virus of one crow carcass carried in to Yokohama City Inst. of Health on June 28, 2004 (the PCR method), it is negative.

In addition, about summary of test result of 2003, please see surveillance business of West Nile virus (WNV) (PDF: 27KB).

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Examination of Health and Social Welfare Bureau institute for health microbe study section

Telephone: 045-370-9379

Telephone: 045-370-9379

Fax: 045-370-8462

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