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Influenza A(H5N1) - Multistate (world) - Monitoring human cases (ECDC/CDTR, November 15 2013): 37 cases so far in 2013
Source: European Centre for Disease Prevention and Control (ECDC), full page: (LINK). Extracts.]
COMMUNICABLE DISEASE THREATS REPORT, Week 46, 10-16 November 2013
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Influenza A(H5N1) - Multistate (world) - Monitoring human cases
Opening date: 15 June 2005 Latest update: 16 October 2013
Epidemiological summary
Thirty-seven human cases with influenza A(H5N1) virus infection have been laboratory-confirmed since the beginning of the
year.
The latest two cases were reported on 14 November from Cambodia.
The countries affected this year are:
Among these cases, 23 have been fatal, most of them in Cambodia (14).
Since 2003, as of 14 November, 647 cases of influenza A(H5N1) were reported from 15 countries worldwide, of which 383 were
fatal (CFR 59%).
Among the countries in the Western Pacific Region with more than 10 reported cases, Cambodia had the highest CFR of 70% (32 out of 47).
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ECDC assessment
Hong Kong reported the world's first outbreak of bird flu among humans in 1997, when six people died.
Most human infections are the result of direct contact with infected birds, and countries with large poultry populations in close contact with humans are considered to be most at risk of bird flu outbreaks.
ECDC follows the worldwide A(H5N1) situation through epidemic intelligence activities in order to identify significant changes in the epidemiology of the virus.
ECDC re-assesses the potential of a changing risk for A(H5N1) to humans on a regular basis.
There are currently no indications that there is any significant change in the epidemiology associated with any clade or strain of the A(H5N1) virus from a human health perspective. This assessment is based on the absence of sustained human-to-human transmission, and on the observation that there is no apparent change in the size of clusters or reports of chains of infection.
However, vigilance for avian influenza in domestic poultry and wild birds in Europe remains important.
During 2013, Cambodia has experienced a significant increase in the number of reported cases compared to previous years. All but five of the cases were children and had contact with poultry prior to falling ill.
However, the increase in the number of cases is not linked with a clustering of cases or human-to-human transmission and the previous ECDC rapid risk assessment for influenza A(H5N1) remains valid.
Actions
WHO is now reporting H5N1 cases on a monthly basis. ECDC will continue monthly reporting in the CDTR to coincide with WHO reporting.
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COMMUNICABLE DISEASE THREATS REPORT, Week 46, 10-16 November 2013
(...)
Influenza A(H5N1) - Multistate (world) - Monitoring human cases
Opening date: 15 June 2005 Latest update: 16 October 2013
Epidemiological summary
Thirty-seven human cases with influenza A(H5N1) virus infection have been laboratory-confirmed since the beginning of the
year.
The latest two cases were reported on 14 November from Cambodia.
The countries affected this year are:
- Cambodia (26),
- China (2),
- Vietnam (2),
- Bangladesh (1),
- Indonesia (2) and
- Egypt (4).
Among these cases, 23 have been fatal, most of them in Cambodia (14).
Since 2003, as of 14 November, 647 cases of influenza A(H5N1) were reported from 15 countries worldwide, of which 383 were
fatal (CFR 59%).
Among the countries in the Western Pacific Region with more than 10 reported cases, Cambodia had the highest CFR of 70% (32 out of 47).
(?)
ECDC assessment
Hong Kong reported the world's first outbreak of bird flu among humans in 1997, when six people died.
Most human infections are the result of direct contact with infected birds, and countries with large poultry populations in close contact with humans are considered to be most at risk of bird flu outbreaks.
ECDC follows the worldwide A(H5N1) situation through epidemic intelligence activities in order to identify significant changes in the epidemiology of the virus.
ECDC re-assesses the potential of a changing risk for A(H5N1) to humans on a regular basis.
There are currently no indications that there is any significant change in the epidemiology associated with any clade or strain of the A(H5N1) virus from a human health perspective. This assessment is based on the absence of sustained human-to-human transmission, and on the observation that there is no apparent change in the size of clusters or reports of chains of infection.
However, vigilance for avian influenza in domestic poultry and wild birds in Europe remains important.
During 2013, Cambodia has experienced a significant increase in the number of reported cases compared to previous years. All but five of the cases were children and had contact with poultry prior to falling ill.
However, the increase in the number of cases is not linked with a clustering of cases or human-to-human transmission and the previous ECDC rapid risk assessment for influenza A(H5N1) remains valid.
Actions
WHO is now reporting H5N1 cases on a monthly basis. ECDC will continue monthly reporting in the CDTR to coincide with WHO reporting.
(?)
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