1. Bacterial Diseases:
- Anthrax: Caused by the bacterium *Bacillus anthracis*, it affects cattle, sheep, and other herbivores. Symptoms include high fever, difficulty breathing, and sudden death.
- Tuberculosis (TB): Caused by various species of *Mycobacterium*, TB primarily affects cattle and deer. Symptoms include coughing, weight loss, and progressive weakness.
- Brucellosis: Caused by the bacteria *Brucella abortus* and *Brucella melitensis*, it leads to abortions, infertility, and reproductive issues in cattle, goats, and pigs.
2. Viral Diseases:
- Foot and Mouth Disease (FMD): Caused by the foot and mouth disease virus, it affects cattle, pigs, sheep, and goats. Symptoms include fever, blisters in the mouth and on the feet, and lameness.
- Rabies: Caused by the rabies virus, it is transmitted through the bite of infected animals and is fatal if untreated. Symptoms include aggression, foaming at the mouth, and paralysis.
- Canine Distemper: A highly contagious viral infection that affects dogs, causing respiratory, gastrointestinal, and neurological symptoms, including coughing, vomiting, seizures, and paralysis.
3. Fungal Diseases:
- Ringworm: Caused by various species of fungi, it results in circular, scaly skin lesions in animals like cattle, horses, and dogs.
- Aspergillosis: Caused by fungi of the genus *Aspergillus*, it leads to respiratory infections in birds and poultry. Symptoms include coughing, sneezing, and difficulty breathing.
4. Protozoan Diseases:
- Coccidiosis: Caused by protozoan parasites of the genus *Eimeria*, it affects the digestive system of animals like poultry, cattle, and rabbits, leading to diarrhea and weight loss.
- Trypanosomiasis (Sleeping Sickness): Transmitted by tsetse flies, trypanosome parasites cause a range of symptoms including fever, weakness, anemia, and neurological issues in cattle and other animals.
- Babesiosis: Caused by protozoan parasites of the genus *Babesia*, it leads to fever, anemia, and jaundice in animals like cattle, horses, and dogs.
These are just a few examples of the many diseases that can affect animals due to microorganisms. Proper hygiene, vaccination, and veterinary care are essential in controlling and preventing such diseases in animal populations.