Livestock scientists say climate change can increase risk of animal pests and diseases

Livestock grazing on an island in the River Niger, as seen off a bridge in Niger’s capital, Niamey (photo credit: ILRI/Stevie Mann).

The livestock sector contributes significantly to the global economy and to rural livelihoods. Globally, approximately one billion smallholder farmers keep livestock. However, the burden of animal disease in developing countries is high; livestock disease kills 20% of ruminants and over 50% of poultry each year, causing annual losses of approximately USD 300 billion.

A new report on climate and livestock disease by scientists from the International Livestock Research Institute (ILRI) shows that climate change can increase the burden of livestock diseases, and some diseases like Rift Valley fever and trypanosomosis are especially sensitive to climate change.

Climate change may also have indirect effects on animal diseases, for example, higher temperatures and greater humidity can lead to faster development of disease-causing parasites and pathogens.

In order to address climate impacts on the livestock sector, the authors make the following recommendations for policymakers:

• Invest in ‘no regret’ adaptation responses. Many adaptation responses based on improving the control of climate-sensitive livestock diseases are ‘no regret’ options, which, by reducing the burden of livestock disease, will enhance community resilience, alleviate poverty and address global inequity irrespective of climate change.
• Improve disease surveillance and response in order to detect changes in disease in a timely way, thus dramatically reducing the costs of response. This requires investment and innovation in disease reporting systems as well as laboratories capable of confirming diseases. Risk-based and participatory surveillance are promising options for improving disease reporting.
• Increase the capacity to forecast near term occurrence of climate-sensitive diseases, and to predict longer-term distribution of diseases through better epidemiological information and ground-truthed models.
• Improve animal health service delivery by investing in the public sector and supporting innovations in the private sector such as community animal health workers linked to private veterinarians. Promote One Health and ecohealth approaches to disease control, especially in vulnerable communities with high reliance on livestock (for example, pastoralists in East Africa).
• Support the eradication of priority diseases where this is economically justified. Develop diagnostics and vaccines, and promote adoption of good practices and strengthened biosecurity to improve disease control.
• Increase the resilience of livestock systems by supporting diversification of livestock and livelihoods, and integrating livestock farming with agriculture. Consider promotion of species and breeds that are more resistant to disease and climate change.
• Adopt breeding strategies focused on identifying and improving breeds that are better adapted to climate change impacts and disease.
• Understand the potential land use changes in response to climate change and monitor their impacts on animal disease to allow preventive or remedial actions.

The report was submitted to the Subsidiary Body for Scientific and Technological Advice (SBSTA) of the United Nations Framework Convention on Climate Change ahead of a special workshop on agriculture at the 42nd session of the SBSTA held on 1-11 June 2015 in Bonn, Germany.

An information note, Impact of climate change on African agriculture: focus on pests and diseases, gives a summary of the submission.

The CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS) and the CGIAR Research Program on Agriculture for Health and Nutrition (A4NH) supported the preparation of the report.

Citation
Grace D, Bett B, Lindahl J and Robinson T. 2015. Climate and livestock disease: assessing the vulnerability of agricultural systems to livestock pests under climate change scenarios. CCAFS Working Paper No. 116. Copenhagen, Denmark: CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS).

 

Global conference on One Health features ILRI research on antimicrobial use in developing countries

Vaccinating chicks in Thuy Phuong province, Vietnam (photo credit: ILRI/Nguyen Ngoc Huyen).

Livestock production is beset by many challenges. Animal diseases, in particular, can lead to reduced production of milk, meat and eggs. In some cases, animal disease infections may result in death, leading to loss of livelihoods for livestock keepers.

Livestock in developing countries suffer a high burden of preventable disease, and this burden is likely to increase as livestock systems become more intensive. Antibiotics and other antimicrobial drugs are often used to treat animal disease infections.

However, authors of a study published in March 2015 in the Proceedings of the National Academy of Sciences of the United States of America (PNAS) warn that the use of antimicrobial drugs in livestock production could contribute to the spread of drug-resistant pathogens in both livestock and humans, posing a significant public health threat.

The study also projects that by the year 2030, global antimicrobial consumption will rise by 67% and nearly double in Brazil, China, India, Russia and South Africa.

In light of the global nature of the problem of antimicrobial resistance, the World Veterinary Association and the World Medical Association prioritized the topic during one of the sessions at their global conference on One Health held in Madrid, Spain on 21-22 May 2015. The conference was organized in collaboration with the Spanish medical and veterinary associations.

Over 300 delegates from 40 countries attended the conference which was aimed at achieving stronger collaboration between physicians, veterinarians and all relevant stakeholders to improve various aspects of the health and welfare of people, animals and the environment.

Delia Grace, veterinary epidemiologist and leader of the Food Safety and Zoonoses program of the International Livestock Research Institute (ILRI), attended the conference and presented on antimicrobial use in developing countries, highlighting some results from research by ILRI.

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The other conference sessions were on zoonotic diseases, natural disaster management, One Health in food production, and veterinary education of the One Health concept. More information is available in the conference report (PDF).

 

Europe Day 2015 celebrations feature aflatoxin research by Finland-funded FoodAfrica program

Harvested maize in Tete Province, Mozambique (photo credit: ILRI/Stevie Mann).

 

As part of celebrations in Nairobi last week to mark Europe Day 2015, the Finland-funded FoodAfrica program took part in an exhibition at the residence of the European Union Delegation to the Republic of Kenya where several project outputs were showcased.

FoodAfrica is a research and development program aimed at providing new knowledge and tools for researchers, decision-makers and farmers towards improved local food security. The program works in Benin, Cameroon, Ghana, Kenya, Senegal and Uganda.

Sara Ahlberg, a Finnish associate professional officer and PhD student attached to the International Livestock Research Institute in Nairobi, presented a poster that highlighted research approaches by the FoodAfrica program to reduce the risk of mycotoxins in the feed-dairy value chain in Kenya, namely,

• Integrated risk and economic assessment of the Kenyan feed-dairy chain
• Investigation of technologies and strategies to reduce mycotoxin risk in the feed-dairy chain
• Impact assessment of a package of post-harvest strategies for reducing aflatoxins in maize

View the poster, FoodAfrica – Reducing risk of mycotoxins

 

Study explores effect of land use and biodiversity changes on risk of zoonoses in Tana River County, Kenya

Orma Boran cattle crossing a river in Kenya (photo credit: ILRI/Rosemary Dolan).

The Dynamic Drivers of Disease in Africa Consortium is a research program that works to understand the relationships between ecosystems, zoonotic diseases, health and wellbeing in order to inform effective public health interventions.

Under this program, multidisciplinary country teams are studying four zoonotic diseases: henipavirus infection in Ghana, Lassa fever in Sierra Leone, Rift Valley fever in Kenya and trypanosomiasis in Zambia and Zimbabwe. The focus is on how changes in biodiversity, land use and climate affect disease transmission.

The development of irrigation schemes is thought to influence pathogen transmission in people and animals in several ways. For example, masses of stagnant water and high humidity support the development of disease vectors like mosquitoes. In addition, irrigated areas are likely to have a higher density of animal hosts like chicken and small ruminants.

In order to investigate the influence of irrigation and changes in biodiversity on the distribution of zoonoses, a cross-sectional study was carried out in Tana River County, Kenya, home to the Hola Irrigation Scheme. The zoonoses of interest were Rift Valley fever, Q fever, brucellosis, West Nile virus, dengue fever and leptospirosis.

Irrigation causes a decline in biodiversity as wildlife habitats are cleared to make way for crop agriculture. However, the linkages between biodiversity and disease risk remain unclear. It was also found that areas with a rich diversity of hosts have higher prevalence of multiple zoonotic pathogens as compared to areas with lower host diversity.

The study also found that while irrigated areas are infested with multiple species of mosquitoes (including primary vectors of Rift Valley fever), their high population densities alone are not enough to sustain the transmission of pathogens; reservoir hosts (for example, birds for West Nile virus) or other persistence mechanisms are required.

These and other findings from the study were presented at the 49th annual scientific conference of the Kenya Veterinary Association which was held in April 2015.

View the presentation, Land use, biodiversity changes and the risk of zoonotic diseases: Findings from a cross-sectional study in Tana River County, Kenya

 

ILRI contributes chapters in new book on One Health approach to sanitation and institutional research

Hung Nguyen-Viet and Delia Grace, researchers with the Food Safety and Zoonoses program of the International Livestock Research Institute (ILRI), are among several chapter authors of a new book “One Health: The Theory and Practice of Integrated Health Approaches” published by CABI in March 2015.

ILRI Asia

Researchers at the International Livestock Research Institute (ILRI) are among the authors of a new book on One Health: The theory and practice of integrated health approaches published by CABI in March 2015.

ILRI’s Hung Nguyen and Delia Grace are among the contributors to this book

Hung Nguyen, a scientist with ILRI’s Food Safety and Zoonoses (FSZ) who is also a joint appointee of Hanoi School of Public Health (HSPH) and the Swiss Tropical and Public Health Institute (TPH), and Delia Grace, program leader of FSZ at ILRI, have co-written, with colleagues from research institutes in Vietnam and Switzerland, chapters on ‘One Health perspective for integrated human and animal sanitation and nutrient recycling’ and ‘Institutional research capacity development for integrated approaches in developing countries: An example from Vietnam’.

The publication, which emphasizes the role of One Health approaches in sanitation and capacity development in Vietnam, says One Health adds ‘value…

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One size does not fit all: Different food safety solutions needed for different contexts

Rinsing fresh fish in Accra, Ghana. Food safety systems need to be tailored to fit the contexts of different countries (photo credit: ILRI/Kennedy Bomfeh).

 

Every year, The Chicago Council convenes the Global Food Security Symposium to discuss the progress of the United States government and the international community on addressing global food and nutrition security. This year’s symposium, scheduled for 16 April in Washington DC, will address food systems for improved health.

In the 10-week period leading up the 2015 Global Food Security Symposium, the Chicago Council ran an online campaign, Healthy Food for a Healthy World, with one blog post being published each week to create awareness on the role of agriculture in improving global health and nutrition.

John McDermott, director of the CGIAR Research Program on Agriculture for Nutrition and Health, and Delia Grace, leader of the Food Safety and Zoonoses program of the International Livestock Research Institute, contributed to the awareness campaign through a guest commentary titled Healthy Foods Must Be Nutritious, Safe and Fair.

In their commentary, they argue that to provide nutritious, safe and fair food to all, food safety systems must be tailored for different national and sub-national contexts.

“In an increasingly globalized world, there are dramatic differences in food systems. Policymakers and the public often assume that one universal system should apply everywhere. But what is good for the rich may be bad for the poor and vice versa.”

They also put forward three key lessons for adapting food safety systems, namely, aligning incentives with policy objectives, adopting risk-based approaches to food safety and developing capacity in food safety governance and practice.

To take part in the online discussions, follow @GlobalAgDev on Twitter, join the discussions using #GlobalAg or tune in to the live stream of the event on 16 April.

 

Why gender matters for food safety

The following is an excerpted version of a blog post originally published on the CGIAR Research Program on Agriculture for Nutrition and Health (A4NH) website.

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Some of the foods that would most enhance nutrition in diets in the developing world are also the riskiest in terms of food safety. Numerous health risks exist along the value chain for livestock and fish products, from production to consumption. In this post, Sophie Theis (Research Analyst, Poverty, Health, Nutrition Division, International Food Policy Research Institute) and Delia Grace (Program Manager, International Livestock Research Institute) relate findings from a recent A4NH/International Livestock Research Institute analysis of 20 livestock and fish value chains in Africa and Asia that reveal how gender differences in value chain participation influence risk exposure.

The results from the participatory risk assessment of these value chains are published in Grace et al. (2010) and a paper analyzing the gendered dimensions of risk is underway by Delia Grace, Sophie Theis, Kristina Roesel, Erastus Kang’ethe and Bassirou Bonfoh.

Selling milk in Ethiopia (photo credit: ILRI).

In rural Mali, a Fulani herder finishes milking a cow and hoists the calabash to his head, the milk sloshing gently in the vessel as he carefully carries the milk to Mariam, the woman he works for. By custom, Mariam has never milked a cow, but once the milk is in her domain, she is in charge of its business and use. Today she decides to keep this calabash for the family, since she has been able to sell milk at a favorable price often in the past week. She sets most aside to naturally sour, which will preserve it in the absence of refrigeration; the fermentation gives a sharp taste that consumers find thirst quenching in the hot season.

In the outskirts of Nairobi, Faith works the udders of her dairy cow. A male relative she has hired to help with the milking approaches with another pail of milk. She accepts it absentmindedly; she is already estimating the prices she will get selling the milk to neighbors and the local milk bar and considering whether she should invest the revenues in hiring another person.

In rural Mali, periurban Kenya, and many other parts of Africa, women play important and varied roles in livestock and fish value chains. The milk that Mariam and Faith helped to produce goes both to their families and to the market; it is also valued as gifts and in Mali as a sacrifice that brings blessing and protection against evil.

The decisions that Mariam and Faith make have bearings on many people’s nutrition: the quantity of milk that they keep for their household, how they apportion milk amongst household members, the use of the income from milk that they sell, and – less often acknowledged, but critical – the extent to which they effectively manage food safety risk, preventing contamination of the milk.

Many of the most nutritious foods, including animal source foods, are amongst the riskiest in terms of pathogen transmission. Meat, milk, fish and eggs provide plenty of nutrients for pathogenic organisms and can also carry infections from animals that harbor them to people. Food-borne disease persists as a major public health problem in Africa and Asia, where the majority of these foods are produced by smallholders, marketed through the informal sector, and sold in wet markets.

Food safety in these products is a major concern, as informal markets are important sources of food for the poor and tend to provide food that is more accessible, affordable, and compatible with local preferences for certain varieties of food and quantities than supermarkets.

Women like Mariam and Faith manage risk as they interact with informal markets by selling and buying food for their households. Informal value chains are complex, shaped by a number of actors. While risk management training interventions tend to focus on the owners of livestock or on actors only in one node of the value chain (e.g. butchers), risk management relies on all the actors along the value chain, from production, aggregation, processing, retail, and consumption. Many of these actors are women, and attention to local norms in the division of labor is critical for targeting food safety assessments and interventions.

Read the complete blog post on the A4NH website

 

BecA-ILRI Hub hosts aflatoxin research platform towards safe food and feed in Africa

Aflatoxin-contaminated groundnut kernels from Mozambique (photo credit: IITA).

Among the many research projects carried out by the Food Safety and Zoonoses program of the International Livestock Research Institute (ILRI) is one that aims to reduce the risk of mycotoxins in the feed-dairy value chain in Kenya so as to improve food safety and safeguard the health of consumers of maize and dairy products.

The project is developing cost-effective and incentive-based mycotoxin control strategies and solutions for use by poor farmers and other actors within the feed-dairy chain.

Mycotoxins are poisonous metabolites produced by various species of moulds. Aflatoxins are cancer-causing mycotoxins produced by the mould Aspergillus flavus.

Aspergillus can grow in a wide range of foods and feed and thrives under favourable growth conditions of high temperature and moisture content.

The main activities of the project are:

• risk assessment of the Kenyan feed-dairy chain to identify the best control options and provide risk managers with information for decision-making
• assessment of the economic costs of aflatoxins in Kenya’s dairy value chain and examination of the cost effectiveness of mitigation strategies
• investigation of technologies and strategies to reduce mycotoxins risk in the feed-dairy chain
• impact assessment of a package of post-harvest strategies for reducing aflatoxins in maize
• dissemination of evidence and building capacity of local researchers and postgraduate students through participation in designing surveys, fieldwork and data analysis

The project also applies participatory methods to develop and test strategies to mitigate the risk of mycotoxins in the feed-dairy chain.

These participatory methods engage farmers in action research on their fields so they can learn and adopt new technologies and disseminate the knowledge to other farmers.

The project is hosted in the aflatoxin research platform of the Biosciences eastern and central Africa (BecA) Hub at ILRI’s headquarters in Nairobi. The platform was set up to provide African scientists and their research partners access to state-of-the-art facilities for nutritional and aflatoxin analysis.

The February 2015 issue of the Aflatoxin Partnership Newsletter, published by the Partnership for Aflatoxin Control in Africa, highlights the aflatoxin platform in an article by Jagger Harvey, a senior scientist at the BecA-ILRI Hub.

Since its establishment in 2011, the platform has hosted work of more than 60 researchers from seven African countries, Australia, Europe and North America,” writes Harvey.

“Collectively, the community around the laboratory has made initial assessments of aflatoxin contamination in a number of countries, conducted the first inoculated field trials in the region to identify maize varieties less susceptible to aflatoxin accumulation, developed models estimating aflatoxin risk at harvest and produced a range of other important findings and tools which are beginning to reach end users to help ensure safer food and feed for Africa”.

 

Uganda pig feed trials show benefits of local feed solutions

CGIAR Research Program on Livestock and Fish

Research assistants chopping jackfruit (left) and weighing a feed trial pig (right) at Kamuzinda Farm, Uganda (photo credit: ILRI/Natalie Carter).

Pig production in Uganda is on the rise. The number of pigs in the country stood at 3.2 million in 2011 (based on a livestock census) from about 200,000 thirty years ago. A rise in the country’s population and incomes has triggered an upsurge in pork consumption. The per capita pork consumption of Uganda was 3.4 kg per person per annum in 2011, the highest in the East Africa region. Most of the pork consumed in the country is supplied by smallholder producers in over 1 million households, with women playing a central role in pig farming.

These figures, however, disguise challenges in the sector including diseases and parasites, unreliable markets, inadequate extension services and most importantly, poor quality and unavailability of pig feeds.

A 2013 value chain assessment conducted by the International…

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First global map of the rising use of antimicrobial drugs in farm animals published in PNAS

ILRI news

A woman in Uganda lets her chickens out to forage during the day (photo on Flickr by Jennifer Wilmore/Bread for the World).

This news article was developed by Tim Robinson with the help of Delia Grace, both of ILRI.

As reported last week in a scientific paper published in the Proceedings of the National Academy of Science (PNAS), Global trends in antimicrobial use in food animals, worldwide antimicrobial consumption is expected to rise by a staggering 67% between 2010 and 2030.

Five countries—Brazil, Russia, India, China and South Africa (the so-called ‘BRICS’)—will experience a growth of 99% in antibiotic consumption.

Use of such drugs has grown as livestock systems intensify around the world to meet a growing world demand for meat, milk and eggs, particularly in developing countries.

Widespread use of these drugs to prevent disease in farm animals or to promote their growth is a growing concern. Inappropriate…

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