👉 Listeriosis is a bacterial infection that typically occurs in dairy cows. It is caused by Streptococcus pyogenes, which is an opportunistic pathogen found in various environments including cattle, poultry, and humans. The bacteria are particularly virulent when they enter the body through respiratory droplets or contaminated milk. Symptoms of listeriosis can include fever, muscle aches, headache, nausea, vomiting, diarrhea, and abdominal pain. In severe cases, it can lead to organ failure
