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Lumpy skin disease (LSD) is one of the major viral diseases still causing great economic losses among breeding flocks of Egypt. This study was designed to focus light on non-cutaneous lesions (prevalence, intensity, and impacts) among necropsied LSD infected cattle. We selected some dairy and beef flocks (Frisian breed) located in 3 governorates (Sharkia, Dakahlia, and Kaloubia) in Nile delta, Egypt, in the period from January 2019 to January 2020 for our survey study. The case history of farms declared no previous vaccination of examined farms. The clinical signs, morbidity, and mortality rates were recorded. Average morbidity and mortality percentage were 22.28% and 6.59%, respectively. PCR for specimens from liver, kidneys, heart, lungs, testis, udder, trachea, and lymph node indicates presence of amplicon capripoxvirus gene product at molecular weight size 192 bp. Postmortem lesions of necropsied and emergency slaughtered were recorded. The main detectable histopathology lesions among the infected animals were orchitis (75%), mastitis in immature and lactating udder (66.66%), and necrotic hepatitis (77.77%), disseminated vasculitis (61.11), glomerulonephritis (55.55), myocardial degeneration (50%), and serous atrophy of coronary fats (38.88%), lymphadenitis (88.88%), necrosis and depleted lymphoid tissue of spleen (38.88%), necrotic myositis (77.77%), tracheitis (16.66%), and pneumonia (interstitial bronchopneumonia) (44.44%) besides intra-cytoplasmic inclusions bodies in skin (33.33%). It could be concluded that higher mortalities of LSD may be due to systemic infection of infected animals which had great impact on economic losses among breeding flocks.

Prevalence, intensity, and impacts of non-cutaneous lesions of lumpy skin disease among some infected cattle flocks in Nile Delta governorates, Egypt