Brucella disease in cattle is one of the serious threats in livestock farming, as cattle can become infected without showing obvious symptoms, leading to abortion, infertility, or the birth of weak calves. Let’s join Vemedim in learning about the disease mechanism, how to recognize it, and how to implement effective prevention and control solutions to help farmers better care for herd health.
Overview of Brucella disease in cattle
Brucella disease, or infectious abortion in cattle, is a chronic infectious disease caused by the bacterium Brucella suis. The disease can occur in both cows and breeding bulls, but its most serious consequences are abortion, stillbirth, or weak calves after birth.
Brucella suis can survive for a long time in the environment and spread mainly through the reproductive route, so it often appears silently and is difficult to detect in the early stages. In addition, the disease is epidemiologically important because it can be transmitted to humans (a zoonotic disease).
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Causes of Brucella disease
Infectious abortion in cattle arises from several factors related to the bacteria, transmission routes, and infection mechanism. Understanding these causes helps farmers identify the source of infection, routes of transmission, and high-risk periods, thereby enabling effective prevention measures.
Causative agent
The main cause is the invasion of Brucella suis bacteria. This bacterium has distinctive biological characteristics that allow it to hide within the host’s body, making it difficult to eliminate and enabling it to survive for a long time in the environment.
- Brucella suis is a Gram-negative, rod-shaped, non-motile bacterium.
- It grows slowly and is intracellular, causing a prolonged and persistent disease.
- It can survive in feces, waste, aborted tissues, or reproductive secretions.
Transmission routes
For the disease to appear in a herd, the bacteria must be transmitted from one animal to another. The important transmission routes are:
- Reproductive route: infected bulls transmit the bacteria to cows through mating or artificial insemination.
- Oral-digestive route: cattle ingest feed or water contaminated with secretions, feces, or aborted tissues.
- Contact route: through skin wounds, mucous membranes, breeding instruments, or the hands of caretakers.
Pathogenesis
When the bacteria enter the body, they move to the lymphatic system, enter the bloodstream, and then localize in the reproductive organs and other tissues of cattle, causing serious reproductive consequences:
- They multiply within phagocytic cells and persist for a long time.
- They localize in lymph nodes, joints, uterus, placenta, and fetus.
- They cause chronic inflammation of the uterus and testes, leading to abortion, stillbirth, or reduced fertility.
Symptoms of Brucella disease in cattle
The symptoms of this infectious abortion disease are often not uniform and depend on the time of infection and the level of infection. Early recognition helps timely intervention and limits spread to reduce losses.
Symptoms in cows
- Abortion or stillbirth, usually occurring in the middle or late stages of pregnancy.
- Premature birth or weak calves, with a high mortality rate.
- Vaginal discharge mixed with blood or pus, accompanied by uterine inflammation.
- Reduced milk production if the cow is lactating.
Symptoms in bulls
- Inflamed, swollen testes, which may atrophy after a few weeks.
- In some cases, the bacteria affect the joints and bones, causing difficulty in walking.
To confirm the disease in a herd, clinical signs should be combined with serological testing:
- Monitor cases of abortion or abnormal stillbirth.
- Serological tests to detect antibodies against Brucella.
- Examine vaginal discharge, placenta, or testes in bulls.
Treatment and prevention measures for Brucella disease
Infectious abortion in cattle is difficult to cure completely, but losses can still be reduced and spread prevented through supportive treatment measures:
- Use broad-spectrum antibiotics combined with anti-inflammatory and antibacterial drugs Vemedim Marbovitryl 100 or Vemedim Vime Fluxin.
- Douching and disinfecting the uterus when abnormal discharge is present.
- Supplement nutrition, vitamins, and minerals with Vemedim Aminovit, Vemedim ADE B Complex to enhance immunity in the dam and calves.
Prevention is an important factor in reducing the risk of spread and economic losses. Farmers can implement the following measures to prevent the disease in their cattle herds:
- Regular vaccination with appropriate vaccines for cows and bulls.
- Screen breeding stock with serological tests before mating.
- Clean and disinfect barns with Vemedim Altacid: remove placenta, secretions, feces, and contaminated bedding.
- Manage contact with infected animals: isolate sick cattle and prevent birds and other animals from contacting the cattle and barns.
- Control feed and treat water sources with Vemedim Disina: ensure they are clean and free from Brucella contamination.
Brucella disease is one of the most dangerous infectious diseases in breeding cattle, causing both economic losses and a threat to human health. Early detection, regular serological testing, strict barn hygiene, and tight breeding management are the keys to preventing the disease from entering and spreading within the farm. Vemedim is always ready to accompany and provide practical guidance to help livestock farmers effectively control many cattle diseases.
