Bird flu threatens countries already in crisis

The deadly H5N1 virus claims its first victim in Iraq while Africa girds itself for a battle against a new pandemic.

BirdFluThreatLive guinea fowl and eggs for sale in a market outside Kano, NigeriaAt the end of January has come news the world was dreading—a preliminary positive report from a US Navy medical laboratory in Cairo of the first death of a person from avian fly in Iraq, a country fighting an insurgency and perhaps in the early stages of civil war. The victim, a girl from Iraq’s Kurdistan region, died two weeks ago in a household that had sick birds; an uncle of hers died later with similar symptoms. With four confirmed deaths of people from avian flu in neighbouring Turkey, where the victims also became infected from sick birds, the fear is that this lethal virus could mutate into a form that can pass from human to human, rather than bird to human as it is normally transmitted now, provoking a flu epidemic that could kill millions of people in a short space of time.

While the fear of avian influenza is keeping some African farmers watchful for sick birds in their flocks, most smallholders are too poor and are facing too many other risks to pay much attention to this flu threat as of yet. African governments, however, are readying themselves. This January, 140 experts from 43 African countries met in Congo’s Brazzaville to draft a blueprint for tackling an outbreak in the world’s poorest continent, already battling AIDS and tuberculosis.

There are fears that avian influenza could spread to the continent via populations of migrating wild birds now residing in eastern Africa to escape the European winter, with the peak of migration being January to March. An outbreak of the lethal H5N1 virus anywhere in Africa’s Horn could spell disaster. More than three-quarters of the people in this region farm for a living and almost all households outside cities keep some chickens. Existing high rates of mortality among domestic birds here will make it hard to detect the virus. Unaware of the risks, villagers would tend to eat birds showing symptoms of the disease. And few African governments would have the resources to pay for culling bird populations and compensating farmers for their losses.

Avian influenza has not been detected in Kenya or any other African country yet. Kenya is close to completing a National Preparedness Plan after a series of weekly meetings by experts, including ILRI immunologist David Mwangi, which started late last year. Kenya has formed a National Avian Influenza Secretariat hosted by the Ministry of Health (MOH) and manned by that Ministry and the Directorate of Veterinary Services (DVS). Dr Mwangi participated in an Avian Influenza National Taskforce meeting in early January, where Kenya’s six-level response system was outlined. Kenya is now in Alert Phase I, which involves surveillance, laboratory support, infection control measures, case management, preparedness and communication and education. A Cabinet paper has been submitted to request funds from the Kenyan Government for this Task Force and donor funds are being sought.

Activities are being conducted now using the limited budgets of the MOH, DVS, Kenyan Museums (whose ornithologists are helping to check wild bird populations for diseased or dead birds), and an office of the US Centers for Disease Control (CDC), whose laboratories at the Kenya Medical Research Institute (KEMRI) include a Biosafety Level-3 Laboratory, the only kind in the country capable of carrying out diagnosis of avian influenza in conjunction with a CDC laboratory in Egypt. Kenya’s frontline national laboratories, KEMRI and DVS, have joined hands in this fight with the Kenya Agricultural Research Institute (KARI) and ILRI to form sub-committees responsible for various work. ILRI is represented on the coordination and resource mobilization team; the surveillance and monitoring team, which are exploiting ILRI’s expertise in epidemiology and geographic information systems; and laboratory support, particularly diagnosis and DNA sequencing and database work.

To read more about ILRI and Kenya plans and activities on this task force, read ‘Bird flu threat still hovers over Kenya’ in the Sunday Nation, 15 January 2005.

The good news is that so far the bird flu virus has remained hard for people to catch. Most human cases acquired their infection during the home slaughtering and subsequent handling (defeathering and eviscerating) of diseased or dead birds before cooking them. The bad news is that in Africa as in Asia, birds are often marketed live, with home slaughtering common, increasing the risk of human infections in areas with outbreaks in poultry. Those buying poultry meat, however, are in no danger because chickens and other poultry are safe to eat if cooked properly.

ILRI agrees with other international organizations that key elements in helping developing countries cope with avian flu outbreaks among animals is strengthening surveillance systems and veterinary laboratories and services, improving people’s access to veterinary services, and providing proper compensation to poultry farmers and marketers for culled birds. World Bank Vice President Jim Adams says that, ‘Experience shows if you get the animal side right, one substantially reduces the risk of a human pandemic.’

With the continuing spread of avian flu beyond its stronghold in Asia, it is clear that combating the disease requires a long-term, internationally coordinated and well-funded effort. That’s why it is good news that donor and international health organizations meeting in Beijing January 17 and 18 pledged US$1.9 billion over the next 3 years to fight bird flu. About $1 billion will be disbursed as grants, the rest as loans. The donors of this massive new program—which include the European Union, United States and World Bank—have set up an Avian Influenza Multidonor Financing Framework to coordinate it.

Read a CGIAR news release and briefing on how the threat of avian flu impacts the developing world.

CDC expert updates Kenya on Avian Influenza

Kenyan CDC expert Dr Kariuki Njenga tells of Kenya's preparedness for bird flu. "The best way to manage the threat is to control the disease at its source – in birds."

Dr Kariuki Njenga, a Kenyan expert working with the International Emerging Infections Programme in the Kenya office of the US Center for Diseases Control (CDC), delivered a seminar on avian influenza to staff of the International Livestock Research Institute (ILRI) at their Nairobi headquarters on Thursday, 25 November 2005.

Dr Njenga said that the influenza viruses are some of the most intriguing and elusive in the world. Special characteristics of the highly pathogenic avian flu virus strain known as H5N1 increase the likelihood that there will be increased emergence of chimeric (new) viruses, one or more of which could cross over to humans and be transmitted from human to human and cause a flu pandemic.

Increased associations between animals and people, Dr Njenga said, especially in Southeast Asia, is providing a conduit for the avian influenza virus to come into contact with people as they handle dead or dying infected birds. Most of the 122 human cases of the disease, with 62 deaths, so far reported to the World Health Organization have occurred on backyard farms where poultry are kept.

‘Our main concern right now in Kenya and other countries in Africa along the migratory bird flyways’, said Dr Njenga, ‘are backyard chicken farmers’. More than three-quarters of Kenyans are rural farmers and it is estimated that more than 90 percent of them keep chickens. The fear is that wild birds infected with the deadly H5N1 virus strain now migrating to Kenya for the European winter might come in contact with domestic water birds, such as ducks, which then might contact free-scavenging chickens kept by poor rural people, and so the virus could be passed from birds to people. If this happens, the country would have to act within 21 days to contain the infection to prevent the outbreak spreading wide.

ILRI and CDC staff are part of a national task force that has been assembled in Kenya to deal with bird flu. This task force is providing early warning of bird die-offs and strengthening surveillance nationwide, developing a communications network and stock-piling anti-virals so that these are on handle to contain any outbreak. There is no effective vaccine to prevent a pandemic caused by the H5N1 flu strain.

The task force is instructing Kenyans to note any sick or dead birds. They should report these to veterinary or government authorities or they may collect dead birds in plastic bags, using plastic bags to protect their hands as they do so, and take them to their local veterinary officer.