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First evidence of Kunjin strain of West Nile virus associated with saltwater crocodile ( Crocodylus porosus ) skin lesions
Author(s) -
Isberg SR,
Moran JL,
De Araujo R,
Elliott N,
Davis SS,
Melville L
Publication year - 2019
Publication title -
australian veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.382
H-Index - 59
eISSN - 1751-0813
pISSN - 0005-0423
DOI - 10.1111/avj.12862
Subject(s) - crocodylus , crocodile , lesion , west nile virus , virology , skin lesion , biology , transmission (telecommunications) , virus , veterinary medicine , medicine , dermatology , pathology , ecology , electrical engineering , engineering
Recently, the Kunjin strain of West Nile virus (WNV KUN ) has been detected using qRT‐PCR in belly skin lesions of farmed juvenile saltwater crocodiles. This follows an established association between similar lesions and West Nile virus in American alligators. The lesions present as cutaneous lymphohistiocytic aggregates in the dermal layers of both species. While these lesion do not create an obvious defect on the live crocodile, upon tanning the lesion area collapses and does not uptake the dye evenly, thus reducing its aesthetic appeal. As a result, skins are being rejected jeopardising the economic viability of the Australian crocodile industry. Over 50 skin lesions have since been confirmed as WNV KUN ‐positive and preliminary evidence of lesion restructuring is presented. Horizontal transmission of WNV KUN by mosquitoes is well‐established but other transmission routes, such as ingestion and cloacal shedding, need further evaluation. An infection trial is currently underway to ensure WNV KUN is the causative agent of these skin lesions.