As it grows it causes significant damage to a dog’s reproductive system and can spread to dogs others very easily through sexual contact.
One of the main reasons as to why this cancer is spreading so rapidly through the stray dog population in Nepal is thus the many years of unchecked breeding.
Scarily however, this cancer can be transmitted through direct transfer of cancer cells, for example when a dog sits in a particular area and the cancer cells from their bodies are left on the ground, and then are picked up again when a new dog rests there.
CTVT first arose several thousand years ago and has been reported in dog populations worldwide; however, its precise distribution patterns and prevalence remain unclear. CTVT is endemic in at least 90 countries worldwide including that of Nepal. Despite its ancient origin, CTVT spread around the globe only relatively recently, which ties in with the growth of stray canine populations around the world and the epidemiological effect of globalization and urbanization on infectious disease.
Despite numerous historical and contemporary reports of the disease, no systematic study of CTVT’s distribution and prevalence has been performed and there is no data available on the epidemiology of CTVT in Nepal.