Lamb mortality due to bronchopneumonia secondary to orf infection and control by vaccination

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Pubblicato: Jan 29, 2018
DOI: https://doi.org/10.12681/jhvms.15630
N. D. GIADINIS (Ν.Δ. ΓΙΑΔΙΝΗΣ)
Clinic of Farm Animals, School of Health Sciences, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki
K. ARSENOPOULOS (Κ. ΑΡΣΕΝΟΠΟΥΛΟΣ)
Laboratory of Parasitology and Parasitic Diseases, School of Health Sciences, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki
M. KRITSEPI-KONSTANTINOU (Μ. ΚΡΙΤΣΕΠΗ-ΚΩΝΣΤΑΝΤΙΝΟΥ)
Diagnostic Laboratory, School of Health Sciences, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki
P. TSAKOS (Π. ΤΣΑΚΟΣ)
Laboratory of Microbiology - Infectious Diseases, Directorate of Veterinary Centre of Thessaloniki, Ministry of Rural Development and Food
P. ILIADOU (Π. ΗΛΙΑΔΟΥ)
Department of Virology, Institute of Infectious and Parasitic Diseases, Athens Centre of Veterinary Institutes
O. MANGANA-VOUGIOUKA (ΜΑΓΚΑΝΑ-ΒΟΥΓΙΟΥΚΑ)
Department of Virology, Institute of Infectious and Parasitic Diseases, Athens Centre of Veterinary Institutes
M. M. ABD EL-TAWAB
Clinic of Farm Animals, School of Health Sciences, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki; Department of Animal Medicine, Faculty of Veterinary Medicine, Beni Suef University
Abstract

Newborn lambs of a sheep flock in Greece showed clinical signs of bronchopneumonia with high perinatal mortality. All different therapeutic protocols that were applied were ineffective. Clinical examination of 4 lambs confirmed that the animals exposed signs of bronchopneumonia and contagious ecthyma. Haematological parameters of all the 4 lambs were within normal limits, while gross pathologic findings were compatible with bronchopneumonia. Lung and scab specimens were taken from all 4 animals for microbiological examination. Orf virus was isolated from all scab specimens, while lung specimens were found negative. In contrast, all lung specimens yielded colonies of Pasteurella multocida, Manheimia haemolytica and Mycoplasma spp. All the remaining pregnant ewes of the flock were vaccinated against orf virus with a commercial live attenuated vaccine. It resulted in diminishment of bronchopneumonia cases in the newborn lambs. In conclusion, it is supported that the lambs in the present flock were immune-suppressed due to orf infection and therefore exposed secondary bronchopneumonia.

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