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Titolo:
Arbovirus infection increases with group size
Autore:
Brown, CR; Komar, N; Quick, SB; Sethi, RA; Panella, NA; Brown, MB; Pfeffer, M;
Indirizzi:
Univ Tulsa, Dept Biol Sci, Tulsa, OK 74104 USA Univ Tulsa Tulsa OK USA 74104 v Tulsa, Dept Biol Sci, Tulsa, OK 74104 USA Ctr Dis Control & Prevent, Div Vector Borne Infect Dis, Natl Ctr Infect Dis, Ft Collins, CO 80522 USA Ctr Dis Control & Prevent Ft Collins CO USA 80522 t Collins, CO 80522 USA Yale Univ, Dept Ecol & Evolutionary Biol, New Haven, CT 06520 USA Yale Univ New Haven CT USA 06520 olutionary Biol, New Haven, CT 06520 USA Univ Munich, Inst Med Microbiol Infect & Epidem Dis, D-80539 Munich, Germany Univ Munich Munich Germany D-80539 & Epidem Dis, D-80539 Munich, Germany
Titolo Testata:
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES
fascicolo: 1478, volume: 268, anno: 2001,
pagine: 1833 - 1840
SICI:
0962-8452(20010907)268:1478<1833:AIIWGS>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
WEST-NILE-VIRUS; EQUINE ENCEPHALOMYELITIS VIRUS; NATURAL VERTICAL TRANSMISSION; CLIFF SWALLOWS; OECIACUS-VICARIUS; COMPLEX; ENCEPHALITIS; ALPHAVIRUSES; PERSISTENCE; EVOLUTION;
Keywords:
alphavirus; Buggy Creek virus; coloniality; disease transmission; Oeciacus vicarius; Petrochelidon pyrrhonota;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Brown, CR Univ Tulsa, Dept Biol Sci, Tulsa, OK 74104 USA Univ Tulsa TulsaOK USA 74104 ept Biol Sci, Tulsa, OK 74104 USA
Citazione:
C.R. Brown et al., "Arbovirus infection increases with group size", P ROY SOC B, 268(1478), 2001, pp. 1833-1840

Abstract

Buggy Creek (BCR) virus is an arthropod-borne alphavirus that is naturallytransmitted to its vertebrate host the cliff swallow (Petrochelidon pyrrhonota) by an invertebrate vector, namely the cimicid swallow bug (Oeciacus vicarius). We examined how the prevalence of the virus varied with the groupsize of both its vector and host. The study was conducted in southwestern Nebraska where cliff swallows breed in colonies ranging from one to 3700 nests and the bug populations at a site vary directly with the cliff swallow colony size. The percentage of cliff swallow nests containing bugs infectedwith BCR virus increased significantly with colony size at a site in the current year and at the site in the previous year. This result could not be explained by differences in the bug sampling methods, date of sampling, sample size of the bugs, age structure of the bugs or the presence of an alternate host, the house sparrow (Passer domesticus). Colony sites that were reused by cliff swallows showed a positive autocorrelation in the percentage of nests with infected bugs between year t and year t + 1, but the spatial autocorrelation broke down for year t + 2. The increased prevalence of BCR virus at larger cliff swallow colonies probably reflects the larger bug populations there, which are less likely to decline in size and lead to virus extinction. To the authors' knowledge this is the first demonstration of arbovirus infection increasing with group size and one of the few known predictive ecological relationships between an arbovirus and its vectors/hosts. The results have implications for both understanding the fitness consequences of coloniality for cliff swallows and understanding the temporal and spatial variation in arboviral epidemics.

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Documento generato il 12/07/20 alle ore 02:21:15