Insect virus transmission: different routes to persistence

Cory, Jenny S.

doi:10.1016/j.cois.2015.01.007

Cited by 53 publications

(57 citation statements)

References 49 publications

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“…PhopGV isolates from different hosts presented variations in egt gene (Carpio et al., ; Zeddam et al., ). Although not demonstrated, changes in this or other encoding sequences would lead to an increased larval size to achieve a greater amount of viral progeny virus and ensure high horizontal transmission, or can induce changes in insect behaviour to achieve the same outcome (Cory, ). The differences in the genome restriction analysis could provide a genetic evidence of this phenotypic change.…”

Section: Discussionmentioning

confidence: 99%

Potential of betabaculoviruses to control the tomato leafminer Tuta absoluta (Meyrick)

Valderrama

Barrera

López‐Ferber

et al. 2017

J Applied Entomology

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The tomato leafminer Tuta absoluta (Meyrick 1917) (Lepidoptera:Gelechiidae) is a devastating pest, causing losses of up to 100%. An interesting tool for its control is the use of the insect specific viruses of Baculoviridae family. Despite its high potential, its use on T. absoluta larvae has been poorly studied. In this work, Colombian granuloviruses VG013 and VG003 isolated from T. absoluta and Tecia solanivora (Lepidoptera:Gelechiidae) larvae sampled in tomato and potato crops, respectively, were morphologically, biologically and molecularly characterized. Occlusion bodies showed ovoid shape containing one nucleocapsid. Restriction endonuclease analysis revealed a pattern similar to Phthorimaea operculella granulovirus and bioinformatics studies showed that both isolates are variants of that baculovirus specie. Similar mean lethal concentrations (LC50) on T. absoluta larvae were estimated for both viruses, although VG013 exhibited shorter mean time to death than VG003. The latter reached a higher OBs yield in comparison with VG013. These results demonstrated an interesting potential of evaluated betabaculoviruses to control T. absoluta populations and pointed key features to its use under field conditions.

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Section: Discussionmentioning

confidence: 99%

Potential of betabaculoviruses to control the tomato leafminer Tuta absoluta (Meyrick)

Valderrama

Barrera

López‐Ferber

et al. 2017

J Applied Entomology

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“…Third, the short infection peak is followed by a low and stable load of asymptomatic MHLB infection in which only a few tens of copy numbers per 1 μl of blood persist. This low and persistent MHLB infection dynamics is similar to several other haemoplasmas of domestic animals (Groebel, Hoelzle, Wittenbrink, Ziegler, & Hoelzle, 2009;Hoelzle et al, 2014;Museux et al, 2009;Tasker et al, 2009b), as well as to other parasites/pathogens (Bartonella spp., Mycobacterium tuberculosis, Plasmodium spp., Brucella spp., Helicobacter pylori, Burkholderia pseudomallei, Coxiella burnetii and Salmonella enterica serovar Typhi; Chomel et al, 2009;Cory, 2015;Merrell & Falkow, 2004;Monack, Mueller, & Falkow, 2004;Okamura, 2016;Rhen, Eriksson, Clements, Bergstrom, & Normark, 2003). Such an infection dynamics may be the result of the parasites/pathogens' strategy to evade the immune response, compensating for their low loads with their low level of damage to their mammalian host, which reduces their mortality probability (the transmission-virulence trade-off; Anderson & May, 1982;Ewald, 1995;Sorrell et al, 2009).…”

Section: Infection Dynamicsmentioning

confidence: 99%

Haemoplasmas in wild rodents: Routes of transmission and infection dynamics

et al. 2018

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The way that some parasites and pathogens persist in the hostile environment of their host for long periods remains to be resolved. Here, longitudinal field surveys were combined with laboratory experiments to investigate the routes of transmission and infection dynamics of such a pathogen-a wild rodent haemotropic bacterium, specifically a Mycoplasma haemomuris-like bacterium. Fleaborne transmission, direct rodent-to-rodent transmission and vertical transmission from fleas or rodents to their offspring were experimentally quantified, and indications were found that the main route of bacterial transmission is direct, although its rate of successful transmission is low (~20%). The bacterium's temporal dynamics was then compared in the field to that observed under a controlled infection experiment in field-infected and laboratory-infected rodents, and indications were found, under all conditions, that the bacterium reached its peak infection level after 25-45 days and then decreased to low bacterial loads, which persist for the rodent's lifetime. These findings suggest that the bacterium relies on persistency with low bacterial loads for long-term coexistence with its rodent host, having both conceptual and applied implications.

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“…We identified 11 novel common glow-worm RNA viruses. In insects, viruses transmit horizontally through feeding, mating, or a vector [30]. Vertical virus transmission may occur through genome integration, such as for retroviruses or wasp polydnaviruses [31], or infection of eggs and sperm.…”

Section: Discussionmentioning

confidence: 99%

Identification and characterisation of common glow-worm RNA viruses

et al. 2020

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The common glow-worms (Lampyris noctiluca) are best known for emission of green light by their larvae and sexually active adult females. However, both their DNA and RNA viruses remain unknown. Glow-worms are virologically interesting, as they are non-social and do not feed as adults, and hence their viral transmission may be limited. We identified viral sequences from 11 different virus taxa by the RNA-sequencing of two Finnish populations of adult glow-worms. The viruses represent nine different virus families and have negative, positive, or double-stranded RNA genomes. We also found a complete retroviral genome. Similar viral sequences were found from the sequencing data of common eastern firefly of North America, a species belonging to the same family (Lampyridae) as that of the common glow-worm. On average, an individual glow-worm had seven different RNA virus types and most of them appeared to establish a stable infection since they were found from glow-worms during two consecutive years. Here we present the characterization of load, prevalence, and interactions for each virus. Most of the glow-worm RNA viruses seem to be transmitted vertically, which may reflect the biology of glow-worms as non-social capital breeders, i.e., they invest stored resources in reproduction.

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Insect virus transmission: different routes to persistence

Cited by 53 publications

References 49 publications

Potential of betabaculoviruses to control the tomato leafminer Tuta absoluta (Meyrick)

Potential of betabaculoviruses to control the tomato leafminer Tuta absoluta (Meyrick)

Haemoplasmas in wild rodents: Routes of transmission and infection dynamics

Identification and characterisation of common glow-worm RNA viruses

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