Parasitology Research (2016) 115, 2381-2388

Christoph Kurze, Christopher Mayack, Frank Hirche, Gabriele I. Stangl, Yves Le Conte, Per Kryger and Robin F.A. Moritz (2016)
Nosema spp. infections cause no energetic stress in tolerant honeybees
Parasitology Research 115 (6), 2381-2388
Abstract: Host-pathogen coevolution leads to reciprocal adaptations, allowing pathogens to increase host exploitation or hosts to minimise costs of infection. As pathogen resistance is often associated with considerable costs, tolerance may be an evolutionary alternative. Here, we examined the effect of two closely related and highly host dependent intracellular gut pathogens, Nosema apis and Nosema ceranae, on the energetic state in Nosema tolerant and sensitive honeybees facing the infection. We quantified the three major haemolymph carbohydrates fructose, glucose, and trehalose using high-performance liquid chromatography (HPLC) as a measure for host energetic state. Trehalose levels in the haemolymph were negatively associated with N. apis infection intensity and with N. ceranae infection regardless of the infection intensity in sensitive honeybees. Nevertheless, there was no such association in Nosema spp. infected tolerant honeybees. These findings suggest that energy availability in tolerant honeybees was not compromised by the infection. This result obtained at the individual level may also have implications at the colony level where workers in spite of a Nosema infection can still perform as well as healthy bees, maintaining colony efficiency and productivity.
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Link to article at publishers website
Database assignments for author(s): Christoph Kurze, Yves Le Conte, Christopher Mayack, Per Kryger

Research topic(s) for pests/diseases/weeds:
damage/losses/economics

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Vairimorpha apis
	Vairimorpha ceranae