By Scout Nelson
Summer grazing offers many benefits for cattle, but also brings a higher risk of pinkeye. Pinkeye is a bacterial eye infection that causes irritation and swelling. If left untreated, it can lead to blindness and loss of productivity.
According to Dr. Jake Galbreath, NDSU Extension veterinarian, bacteria like Moraxella bovis are common causes, but viruses and other pathogens may also contribute. Natural eye barriers can be broken by dust, UV light, or physical trauma, making infection more likely.
Flies, especially face flies, are key in spreading pinkeye as they feed on eye secretions and move between animals. Controlling flies through proper timing and application is essential. Environmental strategies such as providing shade and reducing dust can also reduce irritation.
“Providing shade from UV light, reducing dust in pens and managing pastures to avoid overgrazing and grazing around coarse vegetation can all limit irritation and trauma to the eye,” said Lacey Quail, NDSU Extension livestock management specialist at the North Central Research Extension Center.
Early signs include watery eyes, squinting, or face rubbing. These signs may appear within three days of exposure. In severe cases, cloudy spots and ulcers can develop, potentially leading to blindness.
Prompt treatment with vet-approved antibiotics and anti-inflammatory drugs is critical. Protecting the eye with a patch or stitching can aid healing. Keeping infected cattle separate helps prevent the spread.
Vaccination programs, especially using herd-specific vaccines, can help reduce future outbreaks. Following proper dosage, storage, and booster schedules improves results.
Regular herd checks and early response are the best ways to protect cattle health during the summer season.
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Categories: North Dakota, Livestock, Dairy Cattle