Aedes Triseriatus (Diptera: Culicidae) and La Crosse Virus: II. Modification of mosquito feeding behavior by virus infection1

Grimstad, Paul R.; Ross, Quentin E.; Craig, George B.

doi:10.1093/jmedent/17.1.1

Cited by 121 publications

(123 citation statements)

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“…Although some studies have demonstrated a negative effect of arbovirus infection on traits associated with vector fitness (Grimstad et al 1980;Platt et al 1997;Scott & Lorenz 1998;Lee et al 2000;Moncayo et al 2000;Mahmood et al 2004), others have failed to detect any significant impact ( Patrican & DeFoliart 1985;Berry et al 1987;Putnam & Scott 1995). When they have been investigated, factors such as initial viral dose (Cooper et al 2000;Mahmood et al 2004), virus strain (Scott & Lorenz 1998) or environmental quality (Patrican & DeFoliart 1985;Dohm et al 1991) did not significantly explain the extent of the fitness cost of infection.…”

Section: Introductionmentioning

confidence: 99%

Mode of transmission and the evolution of arbovirus virulence in mosquito vectors

2009

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The traditional assumption that vector-borne pathogens should evolve towards a benign relationship with their arthropod vectors has been challenged on theoretical grounds and empirical evidence. However, in the case of arboviruses (arthropod-borne viruses), although a number of investigators have reported experimental evidence for virus-induced vector mortality, others have failed to detect any significant impact. Whether this variation in the observed level of arbovirus virulence depends on biological traits or experimental design is unclear. Here, we perform a meta-analysis of studies across a range of mosquitovirus systems to show that, overall, arboviruses do reduce the survival of their mosquito vectors, but that the magnitude of the effect depends on the vector/virus taxonomic groups and the mode of virus transmission. Alphaviruses were associated with highest virulence levels in mosquitoes. Horizontal transmission (intrathoracic inoculation or oral infection) was correlated with significant virus-induced mortality, whereas a lack of adverse effect was found for Aedes mosquitoes infected transovarially by bunyaviruses-a group of viruses characterized by high natural rates of vertical transmission in their enzootic vectors. Our findings are consistent with the general prediction that vertically transmitted pathogens should be less virulent than those transmitted horizontally. We conclude that varying degrees of virulence observed among vector-virus systems probably reflect different selective pressures imposed on arboviruses that are primarily transmitted horizontally versus vertically.

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Section: Introductionmentioning

confidence: 99%

Mode of transmission and the evolution of arbovirus virulence in mosquito vectors

2009

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“…Infections with several different arboviruses can alter blood-feeding behavior in several Aedes species (Grimstad et al 1980, Platt et al 1997, Jackson et al 2012. LACV infection increased probing and decreased engorgement in Ae.…”

Section: Lacvmentioning

confidence: 99%

“…LACV infection increased probing and decreased engorgement in Ae. triseriatus (Grimstad et al 1980), reduced bloodmeal size in both Ae. triseriatus and Ae.…”

Section: Lacvmentioning

confidence: 99%

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How do Nutritional Stress and La Crosse Virus Infection Interact? Tests for Effects on Willingness to Blood Feed and Fecundity inAedes albopictus(Diptera: Culicidae)

Westby

Muturi²,

Juliano³

2015

J Med Entomol

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Evolutionary theory predicts that vector-borne pathogens should have low virulence for their vector because of selection against pathogens that harm the vector sufficiently to reduce transmission. Environmental factors such as nutritional stress can alter vector-pathogen associations by making the vectors more susceptible to pathogens (condition-dependent competence) and vulnerable to the harm caused by pathogen replication (condition-dependent virulence). We tested the hypotheses of condition-dependent competence and conditiondependent virulence by examining the interactive effects of short-term sugar deprivation and exposure to La Crosse virus (LACV) in female Aedes albopictus (Skuse). We predicted that infection status interacts with sugar deprivation to alter willingness to blood feed and fecundity in the second gonotrophic cycle (conditiondependent virulence). Sugar deprivation had no effect on body infection or disseminated infection rates. Infection status, sugar treatment, and their interaction had no effect on fecundity. Mosquitoes that had intermittent access to sugar were significantly more willing to take a second bloodmeal compared with those that had continuous access to sugar. Infection status and the interaction with sugar treatment had no effect on bloodfeeding behavior. Thus, we found no evidence of short-term sugar deprivation leading to condition-dependent competence for, or condition-dependent virulence of, LACV in Ae. albopictus.

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“…The behaviour of insect vectors can be affected by infection with viruses and other parasites (e.g., Grimstad et al 1980, Rowland & Lindsay 1986 and by symbionts (e.g., Evans et al 2009, Moreira et al 2009). There is evidence that the dengue virus can alter the behaviour of Ae.…”

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confidence: 99%

Potential impact of a presumed increase in the biting activity of dengue-virus-infected Aedes aegypti (Diptera: Culicidae) females on virus transmission dynamics

Luz

Lima-Camara²,

Bruno³

et al. 2011

Mem. Inst. Oswaldo Cruz

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Aedes Triseriatus (Diptera: Culicidae) and La Crosse Virus: II. Modification of mosquito feeding behavior by virus infection1

Cited by 121 publications

References 0 publications

Mode of transmission and the evolution of arbovirus virulence in mosquito vectors

Mode of transmission and the evolution of arbovirus virulence in mosquito vectors

How do Nutritional Stress and La Crosse Virus Infection Interact? Tests for Effects on Willingness to Blood Feed and Fecundity inAedes albopictus(Diptera: Culicidae)

Potential impact of a presumed increase in the biting activity of dengue-virus-infected Aedes aegypti (Diptera: Culicidae) females on virus transmission dynamics

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