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Wasps Create a Buzz with Antibiotics
Scientists have found that Digger wasps of the genus Philanthus, so-called beewolves, house beneficial bacteria on their cocoons that guarantee protection against harmful microorganisms.

Scientists of the Max Planck Institute for Chemical Ecology in Jena and researchers at the University of Regensburg and the Jena Leibniz Institute for Natural Product Research discovered that bacteria of the genus Streptomyces produce a cocktail of nine different antibiotics, thereby fending off invading pathogens.

Many insects spend a part of their life underground and are exposed to the risk of fungal or bacterial infections. This is also the case for many digger wasp species that construct underground nests. Unlike bees that use pollen and nectar as food to nurture their larvae, digger wasps hunt insects to feed their offspring. Because of the warm and humid conditions as well as the large amounts of organic material in their subterranean nest, both their food supply and their larvae are endangered by pathogens. Mold and bacterial infection are a major threat and can cause larval death in many cases.

Antibiotics on the surface of the cocoon, produced by symbionts, guarantee protection against microbial pests during such a protracted developmental stage.

An analysis of the substances involved not only contributes to the understanding of the evolution of such symbioses, but could also lead to the discovery of interesting new drug candidates for human medicine.
Using imaging techniques based on mass spectrometry, the antibiotics could be displayed in vivo on the cocoon’s exterior surface. Moreover, it was shown that the use of different kinds of antibiotics provides an effective protection against infection with a multitude of different pathogenic microorganisms. Thus, for millions of years beewolves have been taking advantage of a principle that is known as combination prophylaxis in human medicine.

With their work the researchers are breaking new ground: "Astonishingly, little is known about the ecological importance of antibiotics in their natural environment. Supported by mass spectrometric imaging we are now able to better understand the natural role of antibiotic substances in the environment," says Aleš Svatoš, leader of the mass spectrometry research group.

"We suppose that protective symbioses like the ones between beewolves and Streptomyces bacteria are much more common in the animal kingdom than previously assumed," says Martin Kaltenpoth. "An analysis of the substances involved not only contributes to the understanding of the evolution of such symbioses, but could also lead to the discovery of interesting new drug candidates for human medicine."

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Cold-water dip to raise funds for Vetlife

News Story 1
 The veterinary mental health charity Vetlife is inviting the veterinary community to join it for a sponsored cold-water dip.

The event will take place at Walpole Bay, Margate, on 17 May during Mental Health Awareness Week. Participants of all abilities can join in the challenge and are advised to bring a towel, a hot drink, a snack, and warm clothes to get changed into afterwards.

Those taking part are being asked to try to raise £100 each to support the work of the charity.

Details about how to take part can be found here. 

Click here for more...
News Shorts
Bluetongue low vector period ends

In an update to its bluetongue guidance, the Department for Environment, Food and Rural Affairs (Defra) has announced that the seasonal low vector period for the disease has ended.

With winter over, Defra is planning for a possible increase in cases as midges become more active. It has warned that farms along the east coast of England from Norfolk to Kent, and along the south coast from Kent to Devon, are at highest risk from infected midges blown over from northern Europe.

Since the virus was detected in England in November 2023, there have been 126 confirmed cases. The most recent case to be confirmed was on 1 March 2024.

Farmers are asked to continue to frequently monitor their livestock and ensure their animals and land are registered with the Animal and Plant Health Agency.