Hemorrhagic Septicemia (HS) is one of the deadliest bacterial diseases affecting cattle and buffaloes, particularly in tropical and subtropical countries such as Pakistan, India, Bangladesh, Nepal, and many parts of Southeast Asia. The disease progresses rapidly, often killing apparently healthy animals within 24–48 hours if prompt veterinary treatment is not provided.
HS causes significant economic losses through sudden deaths, reduced milk production, treatment expenses, decreased work performance, and trade restrictions. Fortunately, the disease is largely preventable through timely vaccination, good farm hygiene, and proper biosecurity.
This comprehensive guide explains the causes, symptoms, diagnosis, treatment, prevention, and vaccination strategies for Hemorrhagic Septicemia in cattle and buffaloes.
What is Hemorrhagic Septicemia?
Hemorrhagic Septicemia (HS) is an acute, highly fatal bacterial disease caused by Pasteurella multocida, mainly serotypes B:2 (Asia) and E:2 (Africa). The bacteria invade the bloodstream, causing severe septicemia, widespread inflammation, tissue swelling, and internal bleeding.
Buffaloes are generally more susceptible than cattle and often develop more severe disease.
Causative Agent
Scientific Name: Pasteurella multocida
Important Serotypes
- B:2 (Common in Asia)
- E:2 (Common in Africa)
The organism normally survives in the upper respiratory tract of healthy carrier animals but can cause disease when animals become stressed.
Animals Affected
Hemorrhagic Septicemia commonly affects:
- Cattle
- Buffaloes
- Yaks
- Bison
Buffaloes are usually more severely affected than cattle.
Young adults are generally more susceptible than calves.
Geographic Distribution
HS is common in:
- Pakistan
- India
- Bangladesh
- Nepal
- Sri Lanka
- Thailand
- Indonesia
- Malaysia
- African countries
- Middle East
Outbreaks frequently occur during the rainy season and periods of high humidity.
Causes and Risk Factors
Several factors increase the risk of HS outbreaks.
Environmental Stress
- Heavy rainfall
- High humidity
- Sudden weather changes
- Flooding
Animal Stress
- Transportation
- Poor nutrition
- Overcrowding
- Long-distance movement
- Pregnancy
- Weaning
Farm Management
- Poor sanitation
- Mixing infected and healthy animals
- Lack of vaccination
- Introduction of carrier animals
How Hemorrhagic Septicemia Spreads
The bacteria spread through:
Direct Contact
- Nasal discharge
- Saliva
Indirect Contact
- Contaminated feed
- Drinking water
- Equipment
- Workers’ clothing
Carrier animals can silently spread the bacteria to healthy livestock.
Symptoms of Hemorrhagic Septicemia
Clinical signs usually develop suddenly.
Early Symptoms
- High fever (104–107°F)
- Depression
- Loss of appetite
- Reduced rumination
- Sudden decline in milk production
Advanced Symptoms
One of the most characteristic signs is severe swelling around the throat.
Affected animals may show:
- Swelling beneath the jaw
- Swelling of the neck
- Swollen brisket
- Excessive salivation
- Nasal discharge
- Difficulty swallowing
- Difficulty breathing
Respiratory Signs
Animals often experience:
- Rapid breathing
- Loud breathing
- Open-mouth breathing
- Coughing
- Respiratory distress
Without treatment, suffocation may occur due to severe throat swelling.
Terminal Stage
In severe cases:
- Animal becomes unable to stand
- Collapse
- Shock
- Death within 24–48 hours
Some animals die without showing many visible symptoms.
Post-Mortem Findings
Common findings include:
- Extensive hemorrhages
- Severe edema in throat region
- Congested lungs
- Enlarged lymph nodes
- Fluid accumulation in body cavities
- Enlarged spleen
Diagnosis
Veterinarians diagnose HS using:
Clinical Examination
Typical swelling of the throat with sudden high fever strongly suggests HS.
Laboratory Tests
Diagnosis may be confirmed through:
- Bacterial culture
- PCR testing
- Microscopic examination
- Blood samples
- Tissue culture
Prompt diagnosis is essential because treatment is most successful in the early stages.
Treatment of Hemorrhagic Septicemia
Early treatment dramatically improves survival.
Treatment should always be performed under veterinary supervision.
Antibiotics
The bacteria are generally susceptible to several antibiotics. Selection should be based on veterinary advice, local resistance patterns, and withdrawal periods for food-producing animals.
Anti-inflammatory Drugs
Veterinarians may prescribe anti-inflammatory medications to:
- Reduce fever
- Relieve pain
- Decrease inflammation
Fluid Therapy
Severely dehydrated animals may require:
- Intravenous fluids
- Electrolytes
- Supportive nutritional therapy
Nursing Care
Provide:
- Soft feed
- Plenty of clean water
- Comfortable housing
- Minimal stress
- Isolation from healthy animals
Prevention of Hemorrhagic Septicemia
Prevention is far more economical than treatment.
Vaccination
Routine vaccination is the most effective method of preventing HS.
General recommendations in endemic areas include:
- Vaccinate healthy animals before the rainy season.
- Follow the vaccination schedule recommended by your local veterinary authority.
- Administer booster doses when required by the vaccine manufacturer or official disease control program.
Vaccination timing may vary by region and vaccine type.
Biosecurity Measures
Farmers should:
- Isolate newly purchased animals
- Restrict unnecessary visitors
- Clean and disinfect equipment
- Avoid overcrowding
- Maintain quarantine procedures
- Dispose of carcasses safely
Improve Farm Management
Good management reduces disease risk.
Maintain:
- Balanced nutrition
- Clean water
- Dry housing
- Proper ventilation
- Low stocking density
Economic Importance
Hemorrhagic Septicemia causes major financial losses through:
- Sudden animal deaths
- Reduced milk production
- Treatment expenses
- Reduced body weight
- Lower fertility
- Loss of draught power
- Trade restrictions
In many developing countries, HS remains one of the leading infectious diseases affecting cattle and buffaloes.
Differential Diagnosis
HS should be differentiated from:
- Anthrax
- Black Quarter (Blackleg)
- Foot and Mouth Disease (FMD)
- Bovine Respiratory Disease Complex
- Pneumonia
- Snake bite
- Poisoning
Accurate diagnosis requires veterinary examination and laboratory confirmation.
Can Humans Get Hemorrhagic Septicemia?
Human infection with Pasteurella multocida from cattle is uncommon and differs from the disease seen in livestock. Good hygiene, careful handling of sick animals, and use of personal protective equipment are recommended for veterinarians and farm workers.
Frequently Asked Questions (FAQs)
Is Hemorrhagic Septicemia contagious?
Yes. It spreads rapidly through direct contact, contaminated feed, water, and carrier animals.
Which animals are most susceptible?
Buffaloes are generally more susceptible than cattle, particularly during the rainy season.
Can HS be cured?
Yes. Early veterinary treatment significantly improves the chances of recovery. Delayed treatment greatly increases the risk of death.
What is the best way to prevent HS?
Routine vaccination, strong biosecurity, proper nutrition, and minimizing stress are the most effective preventive measures.
When do outbreaks usually occur?
Most outbreaks occur during the rainy season when humidity is high and animals experience environmental stress.
Key Takeaways
- Hemorrhagic Septicemia is a rapidly progressing bacterial disease of cattle and buffaloes.
- High fever, swelling of the throat, difficulty breathing, and sudden death are characteristic signs.
- Early diagnosis and prompt veterinary treatment are critical for survival.
- Vaccination before the rainy season is the most effective preventive strategy.
- Good biosecurity, sanitation, and stress reduction greatly reduce the risk of outbreaks.
Conclusion
Hemorrhagic Septicemia remains one of the most devastating bacterial diseases of cattle and buffaloes in many parts of Asia and Africa. Because the disease can progress rapidly, farmers should monitor livestock closely for early signs such as fever, throat swelling, and respiratory distress. Routine vaccination, strong biosecurity practices, and immediate veterinary attention at the first sign of illness are essential to protect animal health, improve productivity, and reduce economic losses.
About the Author
Dr. Abdul Khaliq Baig
Veterinary Doctor
Baig Veterinary Clinic, Layyah
📞 +92 300 6761789