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OIE- Porcine reproductive and respiratory syndrome, China

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  • OIE- Porcine reproductive and respiratory syndrome, China

    PORCINE REPRODUCTIVE AND RESPIRATORY SYNDROME - CHINA (03): OIE
    Date: Thu 9 Aug 2007
    Source: OIE, WAHID (World Animal Health Information Database), Disease
    Information 2007; 20(32) [edited]
    <http://www.oie.int/wahid-prod/public.php?page=single_report&pop=1&reportid=5880>


    Porcine reproductive and respiratory syndrome, China (People's Rep of)
    ----------------------------------------------------------------------
    Information received on (and dated) Tue 7 Aug 2007 from Mr Jia Youling,
    national chief veterinary officer, Veterinary Bureau, director general,
    Beijing, China (People's Rep. of)


    Summary
    Report type: follow-up report No. 1
    Start date: 23 Apr 2007
    Date of confirmation of event: 9 May 2007
    Date submitted to OIE: 8 Aug 2007
    Reason for notification: change in epidemiology
    New disease agent: no
    New vector: no
    New host species: no
    Increased pathogenicity -- [this sign probably stands for 'yes'. - Mod.AS]
    Zoonotic impact: no
    Manifestation of disease: sub-clinical infection
    Causal agent: porcine reproductive and respiratory syndrome virus
    Nature of diagnosis: [not given]
    Report pertains to: entire country
    Related reports: immediate notification (9 May 2007)

    New outbreaks
    Outbreak 1: Yunnan, Yunnan
    Date of start of outbreak: 6 Aug 2007
    Outbreak status: continuing (or date resolved not submitted)
    Epidemiological unit: Village
    Affected animals
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 21023 / 5369 / 20450 / not given

    [The following 16 outbreaks have similar data pertaining to the date of
    start, outbreak status, and type of epidemiological unit (village), which
    are therefore not reproduced here. For the full text, subscribers are
    referred to the source URL above.
    - Mod.AS]

    Outbreak 2: Jiangxi, Jiangxi
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 551 / 250 / 528 / not given

    Outbreak 3: Tianjin, Tianjin
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 40 / 37 / 231 / not given

    Outbreak 4: Jiangsu, Jiangsu
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 1959 / 987 / 976 / not given

    Outbreak 5: Inner Mongolia, Inner Mongolia
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 228 / 89 / 210 / not given

    Outbreak 6: Guangxi, Guangxi
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 9489 / 1597 / 439 / not given

    Outbreak 7: Zhejiang, Zhejiang
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 201 / 85 / 0 / not given

    Outbreak 8: Liaoning, Liaoning
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 41 / 27 / 0 / not given

    Outbreak 9: Gansu, Gansu
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 85 / 57 / 248 / not given

    Outbreak 10: Qinghai, Qinghai
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 389 / 204 / 0 / not given

    Outbreak 11: Hebei, Hebei
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 450 / 234 / 0 / not given

    Outbreak 12: Guizhou, Guizhou
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 3930 / 1195 / 1278 / not given

    Outbreak 13: Shaanxi, Shaanxi
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 3522 / 827 / 39 / not given

    Outbreak 14: Hunan, Hunan
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 35 947 / 11 521 / 38 652 / not given

    Outbreak 15: Anhui, Anhui
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 2837 / 930 / 0 / not given

    Outbreak 16: Shanxi, Shanxi
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 262 / 182 / 173 / not given

    Outbreak 17: Hubei, Hubei
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 15 500 / 2877 / 16 331 / not given

    Summary of outbreaks
    Total outbreaks: 17
    Total animals affected
    Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
    Swine / not given / 96 454 / 26 468 / 79 555 / not given

    Outbreak statistics
    Species / Apparent morbidity rate / Apparent mortality rate / Apparent case
    fatality rate / Proportion susceptible removed*
    Swine / - / - / 27.44 per cent / -
    * Removed from the susceptible population either through death,
    destruction, or slaughter

    Epidemiology
    Source of infection: unknown or inconclusive
    Epidemiological comments

    Note by the OIE's Animal Health Information Department: the People's
    Republic of China has not provided the exact geo-coordinates of the
    outbreaks. Each dot indicated on the map corresponds to the location of the
    chief town of the affected province. [The map is available at the source
    URL. - Mod.AS]

    Control measures
    Measures already applied:
    - movement control inside the country
    - disinfection of infected premises/establishment(s)
    - dipping / spraying
    - stamping out
    - vaccination permitted
    - no treatment of affected animals

    Measures to be applied: none specified

    Diagnostic test results
    Laboratory name and type: Veterinary Diagnosis Laboratory (National
    laboratory)
    Tests and results
    Species / Test / Test date / Result
    1. Swine / reverse transcription-polymerase chain reaction (RT-PCR) / 7 Aug
    2007 / positive
    2. Swine / virus isolation / 7 Aug 2007 / positive

    --
    communicated by:
    ProMED-mail
    <promed@promedmail.org>

    [The information in this follow-up notification is more detailed than the
    information provided in the previous, initial notification on PRRS in
    China, dated 9 May 2007, which pertained to a single outbreak (in the
    village Laosi, district Yuncheng, province Guangdong). The current
    notification provides the names of 17 affected provinces, and partial data
    on the scope of the disease: no number of affected holdings and villages,
    and on their geographical locations.

    While the reason for reporting is indicated as "change of epidemiology",
    explained as "increased pathogenicity", and the reported apparent case
    fatality rate exceeds 27 per cent, the manifestation of the disease is
    described as "sub-clinical infection". This discrepancy is in need of
    clarification.

    In the previous ProMED-mail posting (archived 20070801.2486), we explained
    why the Chinese porcine epizootic, reportedly spreading since mid 2006, was
    titled "undiagnosed" while a Viet Nam porcine epizootic with similarities,
    is titled PRRS (porcine reproductive & respiratory syndrome).
    The
    commendable improvement of China's reporting will allow ProMED-mail to
    relate to the Chinese porcine epizootic as a preliminarily diagnosed
    disease entity, PRRS.

    Complementary information, particularly pertaining to the missing data
    mentioned above, would help. - Mod.AS]
    CSI:WORLD http://swineflumagazine.blogspot.com/

    treyfish2004@yahoo.com
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