Multiyear survey targeting disease incidence in US honey bees

Traynor, Kirsten S.; Rennich, Karen; Forsgren, Eva; Rose, Robyn; Pettis, Jeffery S.; Kunkel, Grace; Madella, Shayne; Evans, Jay D.; Lopez, Dawn; vanEngelsdorp, Dennis

doi:10.1007/s13592-016-0431-0

Cited by 153 publications

(212 citation statements)

References 51 publications

(56 reference statements)

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“…Little research has reported impacts of BQCV on worker pupal development or colony survival, even though it is one of the most prevalent viruses detected in hives in the United States1558596061 and its detections have significantly increased since the early 2000’s. In this work, the synergistic increase in mortality during development observed after treatment with OSS plus viral inoculum was associated with increased BQCV titers.…”

Section: Discussionmentioning

confidence: 99%

An Inert Pesticide Adjuvant Synergizes Viral Pathogenicity and Mortality in Honey Bee Larvae

Fine

Cox-Foster

Mullin

2017

Sci Rep

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Honey bees are highly valued for their pollination services in agricultural settings, and recent declines in managed populations have caused concern. Colony losses following a major pollination event in the United States, almond pollination, have been characterized by brood mortality with specific symptoms, followed by eventual colony loss weeks later. In this study, we demonstrate that these symptoms can be produced by chronically exposing brood to both an organosilicone surfactant adjuvant (OSS) commonly used on many agricultural crops including wine grapes, tree nuts and tree fruits and exogenous viral pathogens by simulating a horizontal transmission event. Observed synergistic mortality occurred during the larval-pupal molt. Using q-PCR techniques to measure gene expression and viral levels in larvae taken prior to observed mortality at metamorphosis, we found that exposure to OSS and exogenous virus resulted in significantly heightened Black Queen Cell Virus (BQCV) titers and lower expression of a Toll 7-like-receptor associated with autophagic viral defense (Am18w). These results demonstrate that organosilicone spray adjuvants that are considered biologically inert potentiate viral pathogenicity in honey bee larvae, and guidelines for OSS use may be warranted.

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Section: Discussionmentioning

confidence: 99%

An Inert Pesticide Adjuvant Synergizes Viral Pathogenicity and Mortality in Honey Bee Larvae

Fine

Cox-Foster

Mullin

2017

Sci Rep

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“…However, in a later field study in Hawaii, no correlation between DWV loads and N. ceranae spore counts were observed (Martin et al ., ). A recent survey suggested that the DWV load may negatively impact establishment of Nosema spp., as Nosema ‐free honey bees had significantly higher DWV loads than Nosema ‐infected honey bees (Traynor et al ., ). The order of infection seems to be important; prior N. ceranae infection inhibited subsequent DWV infection but this was not reciprocal, suggesting asymmetry in the competitive interaction between these pathogens (Doublet et al ., ).…”

Section: What Are the Major Effects Of N Ceranae On Honey Bees?mentioning

confidence: 97%

“…Regarding other viruses, in a 6 year survey Traynor and colleagues () observed a strong positive correlation between Lake Sinai virus‐2 (LSV‐2) and Nosema spp. with intensity peaks opposite to varroa‐peak infestation and its associated viruses DWV and ABPV (Acute bee paralysis virus).…”

Section: What Are the Major Effects Of N Ceranae On Honey Bees?mentioning

confidence: 97%

Nosema ceranae in Apis mellifera: a 12 years postdetection perspective

Martín-Hernández

Bartolomé

Chejanovsky

et al. 2018

Environmental Microbiology

149

107

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Nosema ceranae is a hot topic in honey bee health as reflected by numerous papers published every year. This review presents an update of the knowledge generated in the last 12 years in the field of N. ceranae research, addressing the routes of transmission, population structure and genetic diversity. This includes description of how the infection modifies the honey bee's metabolism, the immune response and other vital functions. The effects on individual honey bees will have a direct impact on the colony by leading to losses in the adult's population. The absence of clear clinical signs could keep the infection unnoticed by the beekeeper for long periods. The influence of the environmental conditions, beekeeping practices, bee genetics and the interaction with pesticides and other pathogens will have a direct influence on the prognosis of the disease. This review is approached from the point of view of the Mediterranean countries where the professional beekeeping has a high representation and where this pathogen is reported as an important threat.

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“…destructor is present and DWV is prevalent in the honey bee population (Budge et al, 2015;Tehel et al, 2016;Traynor et al, 2016). In fact, the presence of V. destructor in honey bee colonies has been linked to increased viral loads, virulence, and prevalence of DWV in honey bee populations (Martin et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Evidence of Varroa-mediated deformed wing virus spillover in Hawaii

Santamaria

Villalobos

Brettell

et al. 2018

Journal of Invertebrate Pathology

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Abstract:Varroa destructor, a parasitic mite of honey bees, is also a vector for viral diseases. The mite displays high host specificity and requires access to colonies of Apis spp. to complete its lifecycle. In contrast, the Deformed Wing Virus (DWV), one of the many viruses transmitted by V. destructor, appears to have a much broader host range. Previous studies have detected DWV in a variety of insect groups that are not directly parasitized by the mite. In this study, we take advantage of the discrete distribution of the Varroa mite in the Hawaiian archipelago to compare DWV prevalence on non-Apis flower visitors, and test whether Varroa presence is linked to a "viral spillover". We selected two islands with different viral landscapes: Oahu, where V. destructor has been present since 2007, and Maui, where the mite is absent. We sampled individuals of Apis mellifera, Ceratina smaragdula, Polistes aurifer, and Polistes exclamens, to assess and compare the DWV prevalence in the Hymenoptera community of the two islands. The results indicated that, as expected, honey bee colonies on Oahu have much higher incidence of DWV compared to Maui. Correspondingly, DWV was detected on the Non-Apis Hymenoptera collected from Oahu, but was absent in the species examined on Maui. The study sites selected shared a similar geography, climate, and insect fauna, but differed in the presence of the Varroa mite, suggesting an indirect, but significant, increase on DWV prevalence in the Hymenoptera community on mite-infected islands.

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Multiyear survey targeting disease incidence in US honey bees

Cited by 153 publications

References 51 publications

An Inert Pesticide Adjuvant Synergizes Viral Pathogenicity and Mortality in Honey Bee Larvae

An Inert Pesticide Adjuvant Synergizes Viral Pathogenicity and Mortality in Honey Bee Larvae

Nosema ceranae in Apis mellifera: a 12 years postdetection perspective

Evidence of Varroa-mediated deformed wing virus spillover in Hawaii

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