Metronidazole for Veterinary Use: Treating Bacterial and Parasitic Infections in Animals

Have you ever wondered how veterinarians treat bacterial and parasitic infestations in animals? Whether it’s a furry companion or a majestic horse, these creatures can fall victim to various infections. In this article, we will explore the use of metronidazole, a powerful antibiotic and antiparasitic drug, in companion animals and large animals. So, let’s dive in and learn more about how metronidazole helps our beloved pets!

Giardiasis: A Common Infection in Dogs

One of the most prevalent infections in dogs is giardiasis. This chronic intestinal infection is caused by the microscopic parasite Giardia duodenalis. Interestingly, this parasite is not only found in dogs but can also infect humans. It is commonly transmitted through contaminated water sources, leading to what is known as “Traveler’s Diarrhea.” While most infected dogs do not show any signs of illness, some may experience weight loss, intermittent diarrhea, and excess mucus in their stool.

Anaerobic Bacteria and Disease in Horses

Horses, on the other hand, can suffer from respiratory tract infections caused by anaerobic bacteria. These bacteria can also cause equine endometritis in mares. Bronchopneumonia, an infection of the lower respiratory tract, is a significant concern for horses. Early identification and immediate treatment are crucial to prevent further complications and respiratory impairment.

Equine Endometritis: A Closer Look

Endometritis, a condition affecting the uterine lining in mares, is a major cause of female infertility. It often goes undiagnosed due to the lack of clear clinical signs. Persistent breeding-induced endometritis (PBIE) can lead to bacterial or fungal infections, further deteriorating the endometrium. Diagnosing endometritis requires a combination of clinical examinations and sampling techniques.

See also  Pyoderma in Dogs: A Comprehensive Guide

Introducing Metronidazole: A Versatile Treatment

Metronidazole, sold under the brand name Flagyl®, is a systemic antibiotic and antiparasitic drug widely used in both small and large animals. Although not approved specifically for veterinary use, metronidazole has shown effectiveness in treating various infections. It is commonly used to combat Giardia spp, Trichomonas spp, anaerobic infections, and other protozoal infections.

Understanding Metronidazole’s Mechanism of Action

Metronidazole works by disrupting DNA and nucleic acid synthesis in bacteria. It exhibits activity against most anaerobic bacteria and has therapeutic effects against parasites like Entamoeba histolytica and Trichomonas spp. It is available in oral and injectable forms, although its use in food animals is prohibited by the U.S. Food and Drug Administration (FDA).

Precautions and Dosage

Like any medication, metronidazole has some contraindications and potential side effects. It should not be used in individuals with Cockayne syndrome or hypersensitivity to metronidazole. Caution is advised when using the drug in severely debilitated, pregnant, or nursing animals. The dosage varies depending on the species and condition being treated.

Where to Buy Metronidazole

Metronidazole is available through various pharmaceutical manufacturers and veterinary custom compounding companies. One such product is METRONIDAZOLE 100MG/ML Suspension by NexGen Pharmaceuticals. Remember, it is crucial to consult with your veterinarian before starting any treatment regimen for your beloved animals.

So, next time your furry friend or noble steed needs treatment for bacterial or parasitic infections, remember the versatility of metronidazole. With proper veterinary guidance, this powerful medication can help your pets recover and restore their health.

For more information about metronidazole and its uses, visit Katten TrimSalon today!

See also  The dog has the lower hind leg, the front leg

Please note that a valid prescription from a licensed veterinarian is required for dispensing this medication.


  1. Ghasemzadeh, I., & Namazi, S. H. (2015). Review of bacterial and viral zoonotic infections transmitted by dogs. Journal of medicine and life, 8(Spec Iss 4), 1-5.
  2. Merck Veterinary Manual.
  3. Sweeney, C. R., Divers, T. J., & Benson, C. E. (1985). Anaerobic bacteria in 21 horses with pleuropneumonia. Journal of the American Veterinary Medical Association, 187(7), 721-4.
  4. Ricketts, S. W., & Mackintosh, M. E. (1987). Role of anaerobic bacteria in equine endometritis. Journal of reproduction and fertility. Supplement, 35, 343-51.
  5. Giguère, S. (2012). Bacterial Pneumonia and Pleuropneumonia in Adult Horses.
  6. Plumb’s Veterinary Drugs.
  7. Wilson, B. T., Strong, A., O’Kelly, S., Munkley, J., & Stark, Z. (2015). Metronidazole Toxicity in Cockayne Syndrome: A Case Series. Pediatrics, 136(3), e706-8.
  8. Morris, L., et al. (2020). Equine endometritis: a review of challenges and new approaches. Reproduction, Volume 160, Issue 5, R95-R110.