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Titolo:
Intra-stadial tick-borne Thogoto virus (Orthomyxoviridae) transmission: accelerated arbovirus transmission triggered by host death
Autore:
Wang, H; Nuttall, PA;
Indirizzi:
NERC, Inst Virol & Environm Microbiol, CEH, Oxford OX1 3SR, England NERC Oxford England OX1 3SR ronm Microbiol, CEH, Oxford OX1 3SR, England
Titolo Testata:
PARASITOLOGY
, volume: 122, anno: 2001,
parte:, 4
pagine: 439 - 446
SICI:
0031-1820(200104)122:<439:ITTV(T>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEMORRHAGIC-FEVER VIRUS; LOUPING-ILL VIRUS; RHIPICEPHALUS-APPENDICULATUS; VIRAL INTERFERENCE; IXODIDAE; MALES;
Keywords:
Rhipicephalus appendiculatus; Thogoto virus; arbovirus; tick-borne virus transmission;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Nuttall, PA NERC, Inst Virol & Environm Microbiol, CEH, Mansfield Rd, Oxford OX1 3SR, England NERC Mansfield Rd Oxford England OX1 3SR ord OX1 3SR, England
Citazione:
H. Wang e P.A. Nuttall, "Intra-stadial tick-borne Thogoto virus (Orthomyxoviridae) transmission: accelerated arbovirus transmission triggered by host death", PARASITOL, 122, 2001, pp. 439-446

Abstract

Haematophagous insect vectors of arthropod-borne viruses (arboviruses) feed repeatedly. Consequently, they can transmit arboviruses to more than one host during the same developmental stage (intra-stadial transmission). By contrast, ixodid ticks generally feed only once at each parasitic stage (larva, nymph, and adult) and hence they have only one opportunity for tickborne virus transmission per stadium (inter-stadial transmission). Under natural conditions, tick-infested hosts may die (from disease or other causes) before the ticks have completed their long period of engorgement. A laboratory model was used to investigate the consequences of premature host death ontick-borne virus transmission. We report intra-stadial transmission of Thogoto virus by the nymphal, male, and female ticks of Rhipicephalus appendiculatus. Tick-borne Thogoto virus infection caused viraemia and death of hamsters before the nymphal and adult licks feeding on them had completed engorgement. The resulting partially fed ticks were allowed to continue engorgement on new, uninfected hosts (interrupted feeding). During feeding on the subsequent hosts, they transmitted the virus intra-stadially to susceptiblehosts (hamsters), and to uninfected co-feeding ticks on non-susceptible hosts (guinea-pigs). Intra-stadial transmission, mediated by interrupted feeding, may help explain outbreaks of rapid and fatal tick-borne viral diseases, and the epidemiology as well as evolution of virulence, in a susceptiblehost population. Additionally, intra-stadial transmission provides an increased risk of tick-borne pathogen transmission to humans and domestic animals during slaughter and game hunting.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 19:42:10