• Treffer 6 von 0
Zurück zur Trefferliste

Beyond nutrition: host-microbiota interactions drive shifts in the behaviouralphenotypes of cockroaches

  • Diverse animal species consume toxins, minerals or secondary compounds as an adaptive response to pathogen infection – a process termed self-medication. Recent studies have also shown that macronutrients can play an important role in an individual’s infection response. For instance African army worm caterpillars select a diet rich in protein and low in carbohydrate upon baculovirus infection. Here we investigate whether dietary choice of macronutrients also plays a role in immunity in the omnivorous cockroach: Blatta orientalis. After challenging individual cockroaches with a common entomopathogenic soil bacterium, Pseudomonas entomophila, we conducted food-choice experiments using two artificial diets differing in their relative protein to carbohydrate ratio. We show for the first time that cockroaches are able to self-select a protein-enriched diet as a response to bacterial infection. This is driven by a sharp decline in carbohydrate intake rather than an increase in protein intake.Diverse animal species consume toxins, minerals or secondary compounds as an adaptive response to pathogen infection – a process termed self-medication. Recent studies have also shown that macronutrients can play an important role in an individual’s infection response. For instance African army worm caterpillars select a diet rich in protein and low in carbohydrate upon baculovirus infection. Here we investigate whether dietary choice of macronutrients also plays a role in immunity in the omnivorous cockroach: Blatta orientalis. After challenging individual cockroaches with a common entomopathogenic soil bacterium, Pseudomonas entomophila, we conducted food-choice experiments using two artificial diets differing in their relative protein to carbohydrate ratio. We show for the first time that cockroaches are able to self-select a protein-enriched diet as a response to bacterial infection. This is driven by a sharp decline in carbohydrate intake rather than an increase in protein intake. Additionally, infected cockroaches reduced their overall nutrient intake, which is consistent with an illness-induced anorexia-like response. The feeding pattern of bacteria-challenged individuals returned to normality approx 4 days after challenge. We also investigate whether cockroach survival and hemolymph immunity are enhanced in individuals when restricted to a protein-rich vs. carbohydrate-rich diet. Overall, our findings demonstrate that macronutrient preferences follow a general pattern independent of pathogen type. Furthermore, we show that interactions between nutrition and immunity are highly conserved in evolution, highlighted by the fact that caterpillars and cockroaches diverged some 386 million years ago.zeige mehrzeige weniger

Volltext Dateien herunterladen

  • Presentation PhD meeting DZG BAM Design.pdf
    eng

Metadaten exportieren

Weitere Dienste

Teilen auf Twitter Suche bei Google Scholar Anzahl der Zugriffe auf dieses Dokument
Metadaten
Autor*innen:Thorben Sieksmeyer
Koautor*innen:Dino Peter McMahon
Dokumenttyp:Vortrag
Veröffentlichungsform:Präsentation
Sprache:Englisch
Jahr der Erstveröffentlichung:2017
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
Freie Schlagwörter:Cockroach; Gut microbiota; Infection; Nutrition
Veranstaltung:22nd Graduate Meeting in Evolutionary Biology of the German Zoological Society
Veranstaltungsort:Plön, Germany
Beginndatum der Veranstaltung:19.04.2017
Enddatum der Veranstaltung:21.04.2017
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:21.02.2018
Referierte Publikation:Nein
Eingeladener Vortrag:Nein
Einverstanden
Diese Webseite verwendet technisch erforderliche Session-Cookies. Durch die weitere Nutzung der Webseite stimmen Sie diesem zu. Unsere Datenschutzerklärung finden Sie hier.