Brucellosis

Also called Malta fever, Mediterranean fever, or Undulant fever

Brucellosis is a bacterial infection that spreads from animals such as cattle, sheep and goats to people. Most people catch it from unpasteurised milk or cheese, or through close contact with infected animals at work. It causes fever and flu-like symptoms that can come and go for weeks.

Last updated Nov 9, 2026

What it is

It is rare in countries where animals are vaccinated and milk is pasteurised, and more common in parts of the Mediterranean, Middle East, Asia and Latin America.

It is treated with a combination of antibiotics for at least 6 weeks. Without treatment it can become long-lasting and affect the bones, joints or heart.

Common signs

  • Fever that comes and goes
  • Sweating, especially at night
  • Tiredness and aches
  • Joint and back pain
  • Loss of appetite and weight

How it is usually diagnosed

  • Blood tests and blood cultures
  • Questions about food, travel and contact with animals

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Blood test and culture results
  • Notes on travel and food eaten
  • Treatment dates and follow-up results

Questions to ask your doctor

  • How long will I need antibiotics?
  • How will we know the infection has gone?
  • Should anyone else who ate the same food be tested?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • High fever with severe headache, confusion or chest pain

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources