Avian Influenza Weekly Update Number 410 (29 November 2013)
Latest information on human avian influenza A(H5N1) cases
Since 2003, the number of cases reported from 15 countries worldwide is 647, of which 383 were fatal (CFR 59.2%). Among the countries in the Western Pacific Region with more than 10 reported cases, Cambodia had the highest CFR of 70.2% (33 out of 47).
Age distribution of the reported cases ranged from 3 months to 81 years old (median 18 years, n=624. The age group with the largest number of cases was 20-29 years of age (22.3%, 139/624), relative to other age groups (0-4; 5-9; 10-19; 30-39; 40-49; 50-59; 60-69; 70+ years). The highest CFR (73.4%) was among persons 10-19 years of age and lowest was among persons 50-59 years old and 70+ years old (both 25.0%). 53.5% of the cases were female (333/622). However, age and sex distributions vary by country.
Table 1: Cumulative Number of Confirmed Human Cases (C) and Deaths (D) of Avian Influenza A (H5N1) Reported to WHO (As of 8 October 2013, except for Western Pacific and South-east Asia Regions, which are timely)
Total number of cases includes number of deaths.
WHO reports only laboratory-confirmed case. All dates refer to onset of illness.
Latest human avian influenza A (H5N1) cases in countries affected in 2013
Bangladesh. The first case in 2013, a 1 year 11 month old male, from Chittagong. He had onset 11th February, hospitalized on 12th February and died (date to be confirmed).
Cambodia. The twenty-sixth case is a 29 year old male from M, Kaun Demrei village, Steung Trang commune, Salakrao district, Pailin province, with fever onset on 26 Oct 2013 was admitted to Battambang Provincial hospital on 3 November. Tamiflu was administered on 6 November and died on the same day. The case reportedly had direct contact with sick and dead poultry. The twenty-fifth case is a 3 year old male from Veal Vong village, Sendey commune, Samrong Tong district, Kampong Speu province, with fever onset on 5 November, was admitted to Kantha Bopha Hospital, Phnom Penh on 8 November. He had contact with dead chickens. The twenty-fourth case is a 10 year old male from Duk Phlork village, Tor Tung commune, Dorng Tung district in Kampot province, with onset on 28 October 2013, admitted admitted to Kantha Bopha Hospital, Phnom Penh on 7 November and died on 9 November. He had contact with dead chickens.
China. The second case, a 31 year old male from Guiyang district, Guizhou province was confirmed positive for A/H5N1 influenza by Guizhou Province CDC on 10th February 2013. The patient was admitted to the Guiyang City Second People's Hospital and later sent to intensive care unit and died on 22nd February 2013. He had onset of symptoms on 03 February and had no clear history of contacting poultry before symptom onset. It was reported that there was no epidemiological linkage between the two cases.
Egypt. The fourth case is a 25 years old female, from Sohaq province. She developed symptoms on 25 April, hospitalized on 29 April and died on 05 May 2013. She was exposed to sick and dead backyard poultry.
Indonesia. The third case, a 31 year old female from East Bekasi city, West Java Province, onset on 1 Nov 2013, was admitted to a private hospital on 6 November and died on 11 November. Epidemiological investigation is ongoing.
Viet Nam. The second case, a 20 year old female, in Tan Hung district, Long An Province, onset on 11 April 2013, admitted to hospital on 14 April 2013 and transferred to Cho Ray Hospital on 15 April 2013. The respiratory samples of this patient were confirmed as A (H5N1) on 18 Apr 2013. She had exposure to a sick duck. Response activities included enhanced surveillance and risk communication. The patient has fully recovered and no further cases were detected from the case’s community.
For further information on the latest global avian influenza A(H5N1) situation and WHO monthly risk assessment:
For latest information on the regional seasonal influenza situation (and the avian influenza A(H7N9) situation in China):
For latest information on the global seasonal influenza situation:
- Epidemiology: http://www.who.int/influenza/surveillance_monitoring/updates/latest_update_GIP_surveillance/
- Virology: http://www.who.int/influenza/gisrs_laboratory/updates/summaryreport
Latest information on avian influenza A (H5N1) outbreaks in animals
Summary of confirmed HPAI H5N1 outbreaks in Western Pacific Region / South-East Asia Region, based on observed outbreak date, reported by OIE/FAO/MoA
- OIE WAHID Weekly Disease Information Reports
- FAO ECTAD HPAI SITUATION UPDATE (EMPRES/GLEWS); official report ONLY
- Update on Avian Influenza in Animals (Type H5)
- Official Report from the Ministry of Agriculture/Livestock