Pathogenic bacteria enhance dispersal through alteration of Drosophila social communication

Ian W. Keesey, Sarah Koerte, Mohammed A. Khallaf, Tom Retzke, Aurélien Guillou, Ewald Grosse-Wilde, Nicolas Buchon, Markus Knaden () and Bill S. Hansson ()
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Ian W. Keesey: Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, Beutenberg Campus
Sarah Koerte: Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, Beutenberg Campus
Mohammed A. Khallaf: Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, Beutenberg Campus
Tom Retzke: Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, Beutenberg Campus
Aurélien Guillou: Cornell University
Ewald Grosse-Wilde: Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, Beutenberg Campus
Nicolas Buchon: Cornell University
Markus Knaden: Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, Beutenberg Campus
Bill S. Hansson: Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, Beutenberg Campus

Nature Communications, 2017, vol. 8, issue 1, 1-10

Abstract: Abstract Pathogens and parasites can manipulate their hosts to optimize their own fitness. For instance, bacterial pathogens have been shown to affect their host plants’ volatile and non-volatile metabolites, which results in increased attraction of insect vectors to the plant, and, hence, to increased pathogen dispersal. Behavioral manipulation by parasites has also been shown for mice, snails and zebrafish as well as for insects. Here we show that infection by pathogenic bacteria alters the social communication system of Drosophila melanogaster. More specifically, infected flies and their frass emit dramatically increased amounts of fly odors, including the aggregation pheromones methyl laurate, methyl myristate, and methyl palmitate, attracting healthy flies, which in turn become infected and further enhance pathogen dispersal. Thus, olfactory cues for attraction and aggregation are vulnerable to pathogenic manipulation, and we show that the alteration of social pheromones can be beneficial to the microbe while detrimental to the insect host.

Date: 2017
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DOI: 10.1038/s41467-017-00334-9

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