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Black Fever Kala Azar: Over 65 cases of Black Fever reported in West Bengal

Black Fever Kala Azar: Over 65 cases of Black Fever reported in West Bengal-Know Kala Azar Symptoms, Causes

Black Fever Kala Azar: At least 65 cases of black fever or ‘Kala Azar have been reported in 11 districts of West Bengal in the past few weeks. Most cases of Kala-azar have been reported from Darjeeling, Malda, North Dinajpur, Dakshin Dinajpur, and Kalimpong districts.

A state official confirmed that 65 cases of black fever had been detected in 11 districts of West Bengal from recent surveillance. He said that now that instances of kala-azar have been reported, the state administration will be able to tackle the spread of the disease.

Black Fever Kala-azar disease was found most commonly in people who have spent a lot of time in Bihar, Jharkhand, and Uttar Pradesh. Some people of Bangladesh are also showing symptoms of Kala-azar. The state administration is also expected to keep an eye on other patients.

According to the official, some cases have also been reported in Murshidabad, Bankura, Purulia, and Birbhum districts. 

Why does black fever happen?

Black fever or Kala-azar is caused by the parasite Leishmania Donovan. The disease is transmitted by the bite of the sand fly Phlebotomine argentipus.

Black Fever Kala Azar Symptoms

The main symptoms of Kala Azar include –

– gray discoloration of the skin



– impairment

– enlargement of the spleen

– enlargement of the liver

-weight event

In chronic cases, the color of the skin turns black.

Is Kala Azar common in India?

Kala-azar is a significant public health problem in India, as it is present in about 54 districts in four Indian states – Bihar, Jharkhand, Uttar Pradesh, and West Bengal. Kala-azar is a vector-borne infectious disease that predominantly affects communities living in tropical and sub-tropical regions.

Which state is most affected by Kala-azar?

Bihar is the most affected state due to Kala Azar because the spread of this disease is highest here. Kala Azar is found in about 33 out of 38 districts of Bihar. The second worst-affected state is West Bengal, which has reported cases from 11 total 23 districts.

Black fever is reported in 6 out of 75 districts of Uttar Pradesh and 4 out of 24 districts in Jharkhand.

Why is Kala-azar called black fever?

Kala-azar is also called black fever, which is caused due to brown color or darkening of the skin usually seen on the face, hands, and feet of patients infected with the disease.

What is used in the treatment of Kala-Azar?

Treatment of kala-azar involves killing the parasite with effective drugs.

Is Kala-azar an infectious disease?

Yes, leishmaniasis ka kala-azar is a contagious parasitic disease transmitted through infected sand flies’ bites. While there are various forms of Leishmaniasis in people, cutaneous Leishmaniasis is a prevalent infectious disease in low- and middle-income countries.

Do protozoa cause Kala-azar?

Yes, Kala Azar is caused by protozoan parasites of more than 20 species of Leishmania. Over 90 sand fly species are known to transmit Leishmania parasites.

There are three primary forms of the disease-

Visceral Leishmaniasis: This form of Leishmaniasis is also known as Kala Azar. It is fatal if left untreated.

Cutaneous Leishmaniasis is the most common form of Leishmaniasis and causes skin sores or ulcers on exposed parts, leaving scars for life.

Mucocutaneous Leishmaniasis: This leads to the partial or complete destruction of the mouth, nose, and throat mucous membranes.

Is Kala Azar Deadly?

Kala Azar or Visceral Leishmaniasis (VL) is fatal if left untreated in more than 95 percent of cases. It is one of the top parasitic diseases with the potential for outbreaks and mortality.

Where is Visceral Leishmaniasis found?

Visceral Leishmaniasis occurs mainly in India, Brazil, and East Africa. Every year around 50000 to 90000 new cases of Kala-azar are reported from all over the world.

In which city was the parasite of Kala-azar first identified?

Kala Azar was first identified in 1824 by Western doctors in Jessore, and this place is currently located in Bangladesh. The disease was initially thought to be a form of malaria.


The central government has set a target of reducing Kala-azar cases at the block level to less than one per 10,000 to eliminate the disease. The disease was almost eradicated from West Bengal until the latest surveillance reported 65 cases in 11 districts.

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