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Volume 20, Number 4—April 2014

Dispatch

Cetacean Morbillivirus in Coastal Indo-Pacific Bottlenose Dolphins, Western Australia

Nahiid StephensComments to Author , Pádraig J. Duignan, Jianning Wang, John Bingham, Hugh Finn, Lars Bejder, Anthony P. Patterson, Carly Holyoake, and Anthony
Author affiliations: Murdoch University, Perth, Western Australia, Australia (N. Stephens, H. Finn, L. Bejder, C. Holyoake); University of Calgary, Calgary, Alberta, Canada (P.J. Duignan); CSIRO, East Geelong, Victoria, Australia (J. Wang, J. Bingham); Agri-Food and Biosciences Institute, Belfast, Northern Ireland, UK (I.A.P. Patterson)

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Summary of findings for 3 bottlenose dolphins recovered from the Swan River, Western Australia, Australia*

Dolphin no. Date recovered Description Pathologic findings IHC results RT-PCR results
1
2009 Jun 5
Juvenile male in good body condition; TL 210 cm
Too decomposed for necropsy
ND
ND
2 2009 Jun 8 Juvenile male in good body condition; TL 210 cm; postmortem interval ≈72 h 1. Encephalitis: severe, focally extensive, suppurative, and necrotizing, with multifocal vasculitis and thrombus formation, with intra-lesional fungal hyphae† Widespread positive staining of lymphocytes, mesenteric lymph node‡ Positive for morbillivirus N and P genes§
2. Splenic and mesenteric node lymphoid depletion, severe
3. Segmental jejunal submucosal hemorrhage with thrombosis



4. Pulmonary (Halocercus sp.) and gastric (Anisakis sp.) nematodes; trematode (Campanula sp.) infestation of the biliary and pancreatic ducts


3 2009 Jun 21 Subadult female in good body condition; TL 222.5 cm; postmortem interval ≈72 h 1. Bronchointerstitial pneumonia: multifocal, pyogranulomatous, associated with intralesional fungal hyphae¶ Widespread staining of lymphocytes, mesenteric lymph nodes; weak staining of vascular endothelium, mesenteric lymph node; widespread staining in hepatic Kupffer cells, sinusoidal endothelial cells, and biliary epithelium# Positive for morbillivirus N and P genes**
2. Nephritis: multifocal, necrotizing, severe, acute, with intralesional bacteria
3. Severe systemic lymphoid depletion
4. Fishing line entanglement, right fluke: chronic and proliferative, with granulation tissue formation, dermatitis, and hyperkeratosis
5. Pulmonary (Halocercus sp.) and gastric (Anisakis sp.) nematodes; trematode (Campanula sp.) infestation of the biliary and pancreatic ducts

*Located at 32°04′S, 115°48′E. TL, total length in centimeters; IHC, immunohistochemical; RT-PCR, reverse transcription PCR; ND, not done; N, nucleoprotein; P, phosphoprotein.
†See Figure 1, panel A.
‡See Figure 1, panel E.
§See Figure 2, Swan River 1.
¶See Figure 1, panels B–D.
#See Figure 1, panel F.
**See Figure 2, Swan River 2.

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