What is Malta Fever?
Malta fever, more commonly known by its scientific name, Brucellosis, is a contagious bacterial infection that can affect both humans and animals. While the term "Malta fever" is a historical one, stemming from its prevalence on the island of Malta in the late 19th and early 20th centuries, the disease continues to be a concern worldwide. In the United States, it is more often referred to simply as Brucellosis.
This illness is caused by a group of bacteria belonging to the genus Brucella. These bacteria are primarily found in livestock such as cattle, goats, sheep, pigs, and dogs. Humans typically contract Brucellosis through direct contact with infected animals, or by consuming unpasteurized dairy products from infected animals. It's a disease that can be quite debilitating and, if left untreated, can lead to serious long-term health complications.
How is Brucellosis Transmitted to Humans?
Transmission of Brucellosis to humans occurs through several primary routes:
- Consumption of Unpasteurized Dairy Products: This is one of the most common ways people get infected. Raw milk, cheese, and ice cream made from the milk of infected animals can contain live Brucella bacteria.
- Inhalation of Infected Aerosols: Farmers, veterinarians, and slaughterhouse workers are at higher risk of inhaling airborne bacteria shed by infected animals, particularly during birthing or when handling infected tissues.
- Direct Contact with Infected Animals or Their Fluids: This includes contact with blood, placenta, or other bodily fluids of infected animals. This is a significant risk for those who work closely with livestock.
- Sexual Transmission: While less common, Brucellosis can be transmitted sexually from an infected person to their partner.
- Laboratory Exposure: Workers in laboratories who handle Brucella cultures can be accidentally exposed.
What are the Symptoms of Malta Fever (Brucellosis)?
The symptoms of Brucellosis can vary greatly from person to person and can often mimic those of other common illnesses like the flu, making diagnosis challenging. Symptoms typically appear within 3 days to 2 months after infection, but can sometimes take longer. The most common symptoms include:
- Fever: This is a hallmark symptom, and it can be recurrent, often spiking in the afternoon and evening and returning to normal by morning. This fluctuating fever is sometimes referred to as "undulant fever."
- Sweats: Profuse sweating, often occurring at night, is another common symptom.
- Malaise and Fatigue: A general feeling of being unwell and extreme tiredness is characteristic.
- Chills: Shivering or feeling cold despite a high temperature.
- Headache: Persistent and often severe headaches.
- Muscle and Joint Pain: Aching in the muscles and joints is very common.
- Loss of Appetite: A decreased desire to eat.
- Weight Loss: Unexplained weight loss can occur.
- Back Pain: Especially pain in the lower back.
In more severe or chronic cases, Brucellosis can lead to complications affecting various organ systems, including:
- Endocarditis: Infection of the heart valves.
- Meningitis: Inflammation of the membranes surrounding the brain and spinal cord.
- Osteomyelitis: Infection of the bone.
- Arthritis: Inflammation of the joints.
- Splenomegaly and Hepatomegaly: Enlargement of the spleen and liver.
- Genitourinary tract infections: Such as epididymo-orchitis (inflammation of the epididymis and testicle) in men.
Diagnosis and Treatment of Brucellosis
Diagnosing Brucellosis typically involves a combination of medical history, physical examination, and laboratory tests. Blood tests are crucial for detecting antibodies against Brucella bacteria. Cultures of blood, bone marrow, or other bodily fluids may also be performed to identify the bacteria directly. These tests help confirm the diagnosis and determine the specific Brucella species involved.
Treatment for Brucellosis involves a long course of antibiotics, usually for at least six weeks. The specific antibiotics used and the duration of treatment depend on the severity of the infection and any complications. Common antibiotic combinations include doxycycline with rifampin, or doxycycline with gentamicin. It is vital to complete the entire course of antibiotics as prescribed by a healthcare professional to ensure the infection is fully eradicated and to prevent recurrence.
Prevention is Key: The most effective way to prevent Brucellosis is to avoid consuming unpasteurized dairy products. Always ensure that milk, cheese, and other dairy items are pasteurized. For individuals who work with animals, wearing protective gear such as gloves and masks, and practicing good hygiene, are essential to minimize exposure risks.
Who is at Risk?
Certain individuals and groups are at a higher risk of contracting Brucellosis:
- Livestock workers: Farmers, ranchers, veterinarians, and slaughterhouse employees.
- Hunters: Especially those who handle wild game.
- Travelers: To regions where Brucellosis is common in animals.
- Consumers of raw or unpasteurized dairy products: Regardless of their occupation.
- Laboratory workers: Handling bacterial cultures.
In the United States, extensive efforts have been made to control Brucellosis in livestock, which has significantly reduced the incidence of the disease in humans. However, it remains an important public health concern, particularly in certain regions and among specific at-risk populations.
Frequently Asked Questions (FAQ)
How long does it take to show symptoms after being exposed to Brucellosis?
Symptoms of Brucellosis can appear anywhere from 3 days to 2 months after exposure. However, in some cases, it can take even longer for symptoms to manifest, especially in chronic or complicated infections.
Why is Brucellosis sometimes called Malta Fever?
The name "Malta fever" originated in the late 19th century when the disease was highly prevalent on the island of Malta. British military doctors studying the illness there noted its widespread occurrence and associated it with the island, leading to the historical designation.
Can Brucellosis be cured?
Yes, Brucellosis can be cured with a prolonged course of antibiotics. It is crucial to adhere strictly to the prescribed treatment regimen to ensure complete eradication of the bacteria and to prevent long-term complications.
