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The Daily Insight

What causes undulant fever

Author

Samuel Coleman

Published Apr 18, 2026

Brucellosis is a highly contagious zoonosis caused by ingestion of unpasteurized milk or undercooked meat from infected animals, or close contact with their secretions. It is also known as undulant fever, Malta fever, and Mediterranean fever.

What pathogen causes undulant fever?

Brucellosis is an infectious disease caused by Brucella species. It is known by many other names, including remitting fever, undulant fever, Mediterranean fever, Maltese fever, Gibraltar fever, Crimean fever, goat fever, and Bang disease.

How do you get Malta fever?

Malta fever is transmitted to humans through direct and indirect contact with infected animals. Infection is most likely caused by ingesting unpasteurized milk or cheese from infected goats or sheep. It causes flu-like symptoms, including fever and lethargy.

How is undulant fever transmitted?

The disease is transmitted through contaminated and untreated milk and milk products and by direct contact with infected animals (cattle, sheep, goats, pigs, camels, buffaloes, wild ruminants and, very recently, seals), and animal carcasses.

What is the meaning of undulant fever?

Definition of undulant fever : a persistent human brucellosis marked especially by remittent fever, weakness, headache, chills, and weight loss and contracted by contact with infected domestic animals or consumption of their products.

Why is it called Malta fever?

The disease is named after the discoverer of the bacterium “David Bruce” in 1887. The name “Malta fever” is derived from the geographic endemic region where the fever is originally described. Brucellosis is almost always transmitted to humans from infected animals.

What was Neapolitan fever?

Symptoms. coughing. Brucellosis is a highly contagious zoonosis caused by ingestion of unpasteurized milk or undercooked meat from infected animals, or close contact with their secretions. It is also known as undulant fever, Malta fever, and Mediterranean fever.

How do you prevent brucellosis in goats?

What can I do to prevent brucellosis in my herd? As with most diseases, the best prevention is to avoid contact with infected animals. Having appropriate biosecurity plans in place can help significantly reduce the risk of transmission, should you find you have infected animals.

What disease is caused by Campylobacter jejuni?

Campylobacteriosis is an infection that causes diarrhea (loose stool/poop) and is the most common cause of bacterial diarrhea in New York State. The majority of cases are seen in the summer months and occur as single cases. Outbreaks (when two or more people become ill from the same source) are uncommon.

What happens if brucellosis is not treated?

Possible complications include: Inflammation of the inner lining of the heart chambers (endocarditis). This is one of the most serious complications of brucellosis. Untreated endocarditis can damage or destroy the heart valves and is the leading cause of brucellosis-related deaths.

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Who discovered Malta fever?

How Themistocles Zammit found Malta Fever (brucellosis) to be transmitted by the milk of goats. One hundred years ago on 14 June 1905, Themistocles Zammit, a Maltese doctor, found that five out of six goats reacted to the blood test for brucellosis, then known as Mediterranean or Malta Fever.

What caused syphilis?

The cause of syphilis is a bacterium called Treponema pallidum. The most common way syphilis is spread is through contact with an infected person’s sore during sexual activity. The bacteria enter the body through minor cuts or abrasions in the skin or mucous membranes.

What size are pathogens?

ClassificationBinomial nameSizeFungusCandida albicans10-12 μmBacteriumBorrelia burgdorferi10 μmAlveolate protistPlasmodium7-14 μmFungus[many]2-10 μm

What is biphasic fever?

In classic dengue fever, there is a biphasic pattern to symptoms. During the first phase, there is an abrupt onset of fever for 2-5 days, malaise, chills, severe headache, myalgias, and retro-orbital and lumbosacral pain. The fever may climb as high as 41°C (105.8°F) but is not associated with an increased pulse.

What is the meaning of viral fever?

A viral fever refers to any fever that results from a viral infection, such as the flu or dengue fever. While most viral fevers resolve on their own within a day or two, some are more severe and require medical treatment. If your temperature starts reading 103°F (39°C) or higher, it’s time to call a doctor.

What disease does Francisella tularensis cause?

Tularemia, also known as “rabbit fever,” is a disease caused by the bacterium Francisella tularensis. Tularemia is typically found in animals, especially rodents, rabbits, and hares. Tularemia is usually a rural disease and has been reported in all U.S. states except Hawaii.

How long does it take to heal brucellosis in human?

The symptoms usually improve and are completely gone within about two to six months. However, the prognosis is poor in people who develop organ changes or complications such as heart damage, neurological, or genitourinary problems caused by chronic Brucella infection.

What does psittacosis do to humans?

In humans, the symptoms are fever, headache, chills, muscle pains, cough, and sometimes breathing difficulty or pneumonia. If left untreated, the disease can be severe, and even result in death, especially in older people. Some people may only experience mild flu-like illness, or have no illness at all.

Is typhus still around today?

Though epidemic typhus was responsible for millions of deaths in previous centuries, it is now considered a rare disease. Occasionally, cases continue to occur, in areas where extreme overcrowding is common and body lice can travel from one person to another.

Where did brucellosis originate from?

JAMA, 1947, 135:1053-1055. 19. Spink, WW, Braude, AI, Castaneda, MR, et al.: Aureomycin therapy in human Brucellosis due to Brucella melitensis. JAMA, 1948, 138:1145-1148.

Is Brucella curable?

Brucella in animals cannot be cured. Brucellosis is rare in the U.S. because of effective animal disease control programs. Fewer than 200 people get sick with the disease each year in the U.S. It is most often seen in the spring and summer months in: Texas.

How can brucellosis be prevented?

Can brucellosis be prevented? There is no vaccine available for brucellosis. However, you can reduce your risk if you avoid eating or drinking unpasteurized milk, cheese and ice cream when you travel. Hunters should wear rubber gloves when handling the internal organs of animals.

What pathogen causes Campylobacter?

Campylobacteriosis is an infection caused by bacteria of the genus Campylobacter. These bacteria live in the intestines of healthy birds, and raw poultry meat commonly has Campylobacter on it.

What foods is Campylobacter found in?

They are prevalent in food animals such as poultry, cattle, pigs, sheep and ostriches; and in pets, including cats and dogs. The bacteria have also been found in shellfish. The main route of transmission is generally believed to be foodborne, via undercooked meat and meat products, as well as raw or contaminated milk.

Does Campylobacter stay in your system?

Most people with a Campylobacter infection recover completely within a week, although some shed (get rid of) Campylobacter bacteria in their stool for weeks after recovery. Campylobacter infection rarely results in long-term health problems.

How do you treat Q fever in goats?

Clincial Signs: With the aid of a veterinarian or extension agent, submit milk, feces, fetal tissue, placenta, vaginal discharge and blood for polymerase chain reaction assay (PCR). Treatment: Isolate infected animals. Antibiotics may decrease the risk of abortion and suppress infection but not eliminate infection.

What are symptoms of brucellosis in goats?

  • abortions in the herd.
  • swollen udders due to infection of the mammary glands (milk producing organs)
  • swollen testicles.
  • nervousness.
  • fever.

What causes mastitis in goats?

Mastitis is an inflammation of udder. Physical injury, stress, or bacteria can cause mastitis. There are several bacteria which are known to cause mastitis in sheep and goats including Streptococcus sp., Staphylococcus sp., Pasteurella sp., and coliforms, such as E. coli.

What bacteria causes Brucella?

Brucellosis is caused by the infectious bacterium Brucella. Most cases result from exposure to infected animals or contaminated animal products.

What is the best medicine for brucellosis?

Two-drug regimen consisting of streptomycin and doxycycline (streptomycin for 2 to 3 weeks and doxycycline for 8 weeks) or gentamicin plus doxycycline (gentamicin for 5-7 days and doxycycline for 8 weeks) should be recommended as the treatment of choice for uncomplicated brucellosis.

What is the incubation period for brucellosis?

The incubation period of brucellosis in cattle, bison, and other animals is quite variable ranging from about 2 weeks to 1 year and even longer in certain instances. When abortion is the first sign observed, the minimum incubation period is usually about 30 days.