🐄 Men's Health

Brucellosis in Nigerian Fulani Communities

Recognising animal-contact fever in livestock-keeping communities

Brucellosis — a bacterial infection caused by Brucella species transmitted from infected livestock — is significantly underdiagnosed in Nigeria, particularly among Fulani pastoralists and others in close contact with cattle, goats, camels, and their products. It is estimated to cause 100,000+ cases annually in sub-Saharan Africa. In Nigeria, direct contact with cattle, goat, and camel milk, meat, and birthing products are the primary routes of infection. Brucellosis is a common unrecognised cause of prolonged fever and joint pain in livestock-keeping communities.

Signs and Symptoms

✓ Undulant fever: characteristically remitting and relapsing fever, often worse in the evenings

✓ Sweating: drenching night sweats with characteristic goaty or musty smell

✓ Profound fatigue, weakness, and malaise

✓ Joint and back pain: arthralgia, sacroiliitis (sacroiliac joint inflammation), spondylitis (spine)

✓ Headache, muscle aches

✓ Depression and neurological symptoms in chronic cases

✓ Complications: orchitis (testicular inflammation in men), endocarditis, liver and spleen enlargement

Risk Factors

Pastoralist communities (Fulani, Hausa-Fulani): direct contact with cattle, goats, camels
Drinking raw (unboiled) milk from cattle, goats, or camels
Consuming fresh unaged cheese (wara) made from unpasteurised milk
Contact with animal afterbirth (placenta) during calving — the highest-risk material
Veterinarians, abattoir workers, farmers
Laboratory workers handling Brucella cultures (biosafety hazard)

When to Seek Help

Consider brucellosisAny person from a livestock-keeping community with prolonged fever (more than 2 weeks) not explained by malaria, typhoid, or other common causes — request brucellosis serology

Investigate back painAny young man from a pastoral community with severe back pain and fever — brucellosis spondylitis can cause vertebral destruction if untreated

Testicular swelling and feverBrucella orchitis is an important cause of unilateral testicular swelling with fever in men from livestock communities — distinguish from epididymo-orchitis with serology

Tests & Diagnosis

🧪 Rose Bengal plate test (RBPT)

Rapid screening test — widely available, low cost; positive result needs confirmation

🧪 Brucella serology (STAT or SAT)

Serum agglutination test — titre >1:160 in context of compatible illness strongly suggests brucellosis; paired sera showing rising titres are most diagnostic

🧪 Blood culture

Culture of Brucella from blood — gold standard but slow (up to 3 weeks), requires specialised lab; available at NCDC and teaching hospital microbiology labs

🧪 FBC and ESR/CRP

Leucopenia (low WBC), anaemia, raised ESR — non-specific but supportive

🧪 MRI spine

For suspected brucella spondylitis — shows intervertebral disc and vertebral body infection

Treatment Options

Doxycycline 100mg twice daily for 6 weeks

The cornerstone of brucellosis treatment; must be combined with another agent — monotherapy leads to very high relapse rates

+ Rifampicin 600-900mg daily for 6 weeks

Standard oral combination: doxycycline + rifampicin for 6 weeks — widely used in Nigeria; rifampicin turns urine, sweat, and tears orange — warn patients

+ Streptomycin (for first 2-3 weeks)

Doxycycline + streptomycin IM is superior to the rifampicin combination in clinical trials but requires injections; used for severe or complicated disease

Complicated brucellosis

Endocarditis: prolonged combination therapy (6+ months); spondylitis: minimum 3 months; orchitis: standard 6-week course + NSAIDs for pain/inflammation

Prevention

Pasteurise or boil all milk before consumption; avoid contact with animal placentas or birthing fluids without gloves; vaccinate livestock (B. abortus S19 or RB51 for cattle, B. melitensis Rev. 1 for goats) — reduces human infection at source

Frequently Asked Questions

Is brucellosis contagious between people?

Person-to-person transmission is very rare. Brucellosis is not spread by coughing, sneezing, or normal social contact. The rare human-to-human transmission routes are breastfeeding, sexual transmission, and blood/tissue transplantation.

Can brucellosis be cured?

Yes — brucellosis is curable with the correct antibiotic combination. However, it must be treated for the full 6 weeks (or longer for complications); incomplete treatment leads to relapse and chronic disease.

Is raw milk safe to drink in Nigeria?

No — raw milk carries risk of brucellosis, tuberculosis, and other pathogens. All milk should be boiled before drinking. Wara cheese made from unpasteurised milk also carries brucellosis risk.

How common is brucellosis in Fulani cattle?

Studies of Nigerian cattle have found seroprevalence of 5-40% in different herds. This means significant human exposure risk exists in communities in close contact with affected cattle. Testing and treating infected livestock is the foundation of human disease prevention.

Is brucellosis tested for routinely in Nigeria?

Brucellosis is significantly underdiagnosed in Nigeria — the Rose Bengal test and SAT are not routinely requested. Many cases of prolonged fever in livestock communities are treated as malaria or typhoid without brucellosis being considered. Awareness among healthcare workers is a major gap.