Fatal Outbreak in Tonkean Macaques Caused by Possibly Novel Orthopoxvirus, Italy, January 20151
Giusy Cardeti
2 , Cesare Ernesto Maria Gruber
2, Claudia Eleni, Fabrizio Carletti, Concetta Castilletti, Giuseppe Manna, Francesca Rosone, Emanuela Giombini, Marina Selleri, Daniele Lapa, Vincenzo Puro, Antonino Di Caro, Raniero Lorenzetti, Maria Teresa Scicluna, Goffredo Grifoni, Annapaola Rizzoli, Valentina Tagliapietra, Lorenzo De Marco, Maria Rosaria Capobianchi, and Gian Luca Autorino
Author affiliations: Istituto Zooprofilattico Sperimentale del Lazio e della Toscana M. Aleandri, Rome, Italy (G. Cardeti, C. Eleni, G. Manna, F. Rosone, R. Lorenzetti, M.T. Scicluna, G. Grifoni, G.L. Autorino); L, Spallanzani National Institute of Infectious Diseases, Rome (C.E.M. Gruber, F. Carletti, C. Castilletti, E. Giombini, M. Selleri, D. Lapa, V. Puro, A. Di Caro, M.R. Capobianchi); Fondazione Edmund Mach di San Michele all’Adige, Trento, Italy (A. Rizzoli, V. Tagliapietra); Parco Faunistico Piano dell'Abatino, Poggio San Lorenzo, Italy (L. De Marco)
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Figure 4
Figure 4. Results from necropsy of Tonkean macaque (Macaca tonkeana) from animal sanctuary, Italy, January 2015. A) Hematoxylin and eosin stain of cutaneous lesion. Focal epidermal necrosis, acanthosis ballooning degeneration, and acantholysis of keratinocytes was observed. Staining shows early vesiculation with eosinophilic intracytoplasmic inclusion bodies (arrows) in enlarged degenerated cells. B) Electron micrograph of skin lesion sample showing negatively stained brick-shaped viral particle of ≈160–220 nm, consistent with orthopoxvirus. Scale bar = 100 nm. C) SYBR Green (ThermoFisher Scientific, Waltham, MA, USA) real-time PCR melting curve of all tested samples. The y-axis shows the ratio of the change in fluorescence over the change in temperature. The average melting temperature (80.8°C ± 1°C) was consistent with that for the orthopoxvirus genome.
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