An environmental cause can include a drug, alcohol or a disease the mother has that can increase the chance for the baby to be born with a birth defect. An agent that can cause a birth defect is known as a teratogen. Multifactorial birth defects are caused by a combination of genes and environmental exposures.
National Rescues. Lyme Disease May Cause Sudden Aggression in Dogs Written by Betsy Sommers of. Peppertree Rescue, Albany, NY, USA. 28th May 2004: We recently had a very strange event that I think we should share around the rescue community. A Young (~2 years) Lab mix, male, came into our program with a questionable background.
Lyme Disease in Dogs. Lyme disease is transmitted when an infected tick bites a dog and transfers the virus into the dog's bloodstream. Many dogs with healthy immune systems can fight off the virus naturally and never experience symptoms.hile you may successfully protect against some forms of Lyme disease, this does not prevent a tick from biting the dog and potentially transmitting viruses such as ehrlichia, Rocky Mountains Spotted Fever or babesiosis.