FN Archimer Export Format
PT J
TI Counting the dead to determine the source and transmission of the marine herpesvirus OsHV-1 in Crassostrea gigas
BT 
AF WHITTINGTON, Richard J.
   PAUL-PONT, Ika
   EVANS, Olivia
   HICK, Paul
   DHAND, Navneet K.
AS 1:1;2:1,2;3:1;4:1;5:1;
FF 1:;2:;3:;4:;5:;
C1 Univ Sydney, Sch Vet Sci, Camden, NSW 2570, Australia.
   Inst Univ Europeen Mer, Technopole Brest Iroise, UMR CNRS UBO IRD IFREMER 6539, Lab Sci Environm Marin LEMAR, F-29280 Plouzane, France.
C2 UNIV SYDNEY, AUSTRALIA
   UBO, FRANCE
UM LEMAR
IN DOAJ
IF 3.117
TC 29
UR https://archimer.ifremer.fr/doc/00438/54989/56412.pdf
LA English
DT Article
AB Marine herpesviruses are responsible for epizootics in economically, ecologically and culturally significant taxa. The recent emergence of microvariants of Ostreid herpesvirus 1 (OsHV-1) in Pacific oysters Crassostrea gigas has resulted in socioeconomic losses in Europe, New Zealand and Australia however, there is no information on their origin or mode of transmission. These factors need to be understood because they influence the way the disease may be prevented and controlled. Mortality data obtained from experimental populations of C. gigas during natural epizootics of OsHV-1 disease in Australia were analysed qualitatively. In addition we compared actual mortality data with those from a Reed-Frost model of direct transmission and analysed incubation periods using Sartwell's method to test for the type of epizootic, point source or propagating. We concluded that outbreaks were initiated from an unknown environmental source which is unlikely to be farmed oysters in the same estuary. While direct oyster-to-oyster transmission may occur in larger oysters if they are in close proximity (< 40 cm), it did not explain the observed epizootics, point source exposure and indirect transmission being more common and important. A conceptual model is proposed for OsHV-1 index case source and transmission, leading to endemicity with recurrent seasonal outbreaks. The findings suggest that prevention and control of OsHV-1 in C. gigas will require multiple interventions. OsHV-1 in C. gigas, which is a sedentary animal once beyond the larval stage, is an informative model when considering marine host-herpesvirus relationships.
PY 2018
PD APR
SO Veterinary Research
SN 0928-4249
PU Biomed Central Ltd
VL 49
IS 34
UT 000429988900002
DI 10.1186/s13567-018-0529-7
ID 54989
ER

EF