'Antelope perfume' keeps flies away from cows

"Antelope perfume" keeps flies away from cows
A farmer uses the new neck collars with the waterbucker's defense when plowing. The outbreaks of sleeping sickness in the cattle could thus be reduced by more than 80 percent. Credit: Photo: Dr. R. K. Saini/icipe

In Africa, tsetse flies transfer sleeping sickness to cattle. This leads to huge losses in milk, meat and manpower. The damage in Africa is estimated to be about $4.6 billion U.S. each year. Prof. Dr. Christian Borgemeister from the Center for Development Research (ZEF) at the University of Bonn and his colleagues from Kenya and the UK have developed an innovative way of preventing the disease. The scientists took advantage of the fact that tsetse flies avoid waterbucks, a widespread antelope species in Africa. The scientists imitated the smell of these antelopes. Eighty percent of cattle equipped with collars containing the defense agent were spared from the infection. This research results are presented in PLOS Neglected Tropical Diseases.

The international team of scientists first isolated, identified and synthesized the waterbuck's repellents in the laboratory. They then filled tiny amounts of the tsetse fly-repellent substance into plastic containers that were tied to the with a collar. From then on the cattle exhaled the smell of the unloved waterbucks—as in the famous wolf in sheep's clothing the were deceived by the "antelope perfume."

Waterbuck odor reduces disease rates by more than 80 percent

"Antelope perfume" keeps flies away from cows
With the traditional method, smoke should keep the tsetse flies away from the cattle. Credit: Dr. R. K. Saini/icipe

This innovative method for prevention was tested in a large two-year field trial in Kenya. For the experiment, 120 Maasai herders provided more than 1,100 of their cattle. Compared to unprotected cattle, the disease rates of the animals wearing the collar treated with the virus were reduced by more than 80 per cent. In general, the animals with the protective collar were healthier, heavier, gave more milk, plowed more land and achieved significantly higher sales on regional markets.

"All of this contributed to a significant improvement in the and household income of the pastoralist families involved," says Borgemeister. Compared to the animal medicines that are usually used to treat the disease, the collar method is significantly cheaper and thus more economical, tells the researchers. In addition, the new technology is very popular among the Maasai herders. Around 99 per cent of the shepherds would like to use the collars.

"This method, successfully tested in practice, represents a significant advance for the food security of many pastoralists and cattle farmers in Africa," says Borgemeister. Since the collars are easy to apply with the antidote and do not entail high costs, the approach is particularly attractive and promising.


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More information: Rajinder K. Saini et al. Protecting cows in small holder farms in East Africa from tsetse flies by mimicking the odor profile of a non-host bovid, PLOS Neglected Tropical Diseases (2017). DOI: 10.1371/journal.pntd.0005977
Journal information: PLoS Neglected Tropical Diseases

Provided by University of Bonn
Citation: 'Antelope perfume' keeps flies away from cows (2017, October 20) retrieved 20 September 2019 from https://medicalxpress.com/news/2017-10-antelope-perfume-flies-cows.html
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