Re: Man contracts brucellosis from feral hogs
Bad news for Texas Cattle Producers. Save a Cow, Kill a Hog.
Brucellosis of cattle, also known as "contagious abortion" and "Bangs disease", is caused by infection with the bacterium Brucella abortus, which can also cause a disease of humans known as "undulant fever". Brucellosis infection of cattle causes abortion or premature calving of recently infected animals, most often between the fifth and eight month of pregancy. Although federal and state regulations have helped to control this disease, there is still a threat. Infected cows frequently suffer from retained afterbirth, are difficult to get rebred and sometimes become sterile.
Brucellosis is spread from the vaginal discharge of an infected cow or from an aborted fetus. The organism has an affinity for the reproductive tract and abortions, retained placenta, weak calves and infertility frequently occur. Breeding bulls which are infected, can transmit the disease to cows at the time of service by infected semen. Milk produced front an infected cow may also harbor the organism. The infected milk creates a public health hazard as this is the organism that causes undulant fever in humans.
There is no treatment for Brucellosis. Prevention of Brucellosis is accomplished by official calfhood vaccination of heifer calves. Vaccination must be done by an accredited veterinarian at calf ages that vary from two to four months using standard dosage vaccine, or from 4 to 12 months using reduced dosage vaccine. Each calf must be identified as officially vaccinated in compliance with state and federal regulations. Quarantines are imposed on infected herds by state and federal authorities until the herd has been proven free of the disease.
How is brucellosis transmitted to humans, and who is likely to become infected?
Humans are generally infected in one of three ways: eating or drinking something that is contaminated with Brucella, breathing in the organism (inhalation), or having the bacteria enter the body through skin wounds. The most common way to be infected is by eating or drinking contaminated milk products. When sheep, goats, cows, or camels are infected, their milk is contaminated with the bacteria. If the milk is not pasteurized, these bacteria can be transmitted to persons who drink the milk or eat cheeses made it. Inhalation of Brucella organisms is not a common route of infection, but it can be a significant hazard for people in certain occupations, such as those working in laboratories where the organism is cultured. Inhalation is often responsible for a significant percentage of cases in abattoir employees. Contamination of skin wounds may be a problem for persons working in slaughterhouses or meat packing plants or for veterinarians. Hunters may be infected through skin wounds or by accidentally ingesting the bacteria after cleaning deer, elk, moose, or wild pigs that they have killed.
