What is the mortality rate of mad cow disease in world?

The mortality rate of mad cow disease, also known as bovine spongiform encephalopathy (BSE), varies and depends on several factors, including the strain of the disease and the population being studied. However, here is an overview of the mortality rate associated with BSE:

1. In cattle: The mortality rate in affected cattle is typically high. Once an animal shows clinical signs of BSE, the disease is invariably fatal, and the animal usually dies within a few weeks to months.

2. In humans: Variant Creutzfeldt-Jakob Disease (vCJD) is the human form of BSE. The mortality rate for vCJD is also very high. Most people who develop vCJD eventually succumb to the disease, and the average survival time after symptom onset is around 13 months.

It's important to note that BSE and vCJD are extremely rare diseases. Strict measures have been implemented in many countries to prevent the transmission of BSE from cattle to humans, such as feed bans on animal-derived protein and rigorous surveillance and testing programs. As a result, the incidence of these diseases has declined significantly in recent years.

It's worth mentioning that there are different strains of BSE, and some atypical forms of the disease may have different characteristics, potentially affecting the mortality rate. Nevertheless, the overall mortality rate for classical BSE in cattle and vCJD in humans remains high.