Dogs do catch some viruses that are contagious to humans, and vice versa. Even though dogs can share illnesses with their owners, it is not possible for a dog to share his flu (or any other illness that causes an upst stomach) with you.
Biological
Eczema is not contagious for dogs, in the same way that it cannot be transferred from human to human. However bacterial skin conditions (which look like eczema, but are not) are contagious for both pets and humans.
Parvo is very contagious to unvaccinated dogs and puppies. It is not contagious to humans.
No a dog can't get a ar infection from a human. Humans can't catch ear infections from other humans either because ear infections are from yeast. Yeast forms when you have a moist warm environment so basily dogs ears. Yeast is like a bacteria of fungi.
Yes strep throat is contagious to dogs. I have strep throat right now and am worried I gave it to my dog.
no
It is called kennel cough and yes it is very contagious.
Both bacterial infections and viral infections can be contagious or not contagious. Some viral infections are not spread from human to human or are only rarely spread that way. TB is a contagious bacterial infection.
Dogs can pretty much get the same illnesses as humans can.
Bacterial pneumonia may occur in both dogs and cats. It is highly contagious between dogs but cats cannot catch it from a dog.
There are some illnesses that are cause through heredity and some which are contagious through contact viral or any other.