Leishmaniasis is caused by a protozoa parasite from over 20 Leishmania species. Over 90 sandfly species are known to transmit Leishmania parasites. There are 3 main forms of the disease: Visceral leishmaniasis (VL), also known as kala-azar is fatal if left untreated in over 95% of cases.
What happens in kala-azar disease?
Kala azar, also called visceral leishmaniasis, is a disease in which a parasite migrates to the internal organs such as the liver, spleen (hence “visceral”), and bone marrow. If left untreated, will almost always result in the death of the host.
Is kala-azar a sexually transmitted disease?
Co-infection may amplify the immune defect against both leishmaniasis and HIV and increase disease severity and morbidity. Visceral leishmanaisis, 100-1000 times more common in HIV, is a major fatal outcome of co-infection.
What do leishmaniasis look like?
People who have cutaneous leishmaniasis have one or more sores on their skin. The sores can change in size and appearance over time. They often end up looking somewhat like a volcano, with a raised edge and central crater. Some sores are covered by a scab.
Is there any treatment for kala azar?
Treatment of kala-azar has been by use of pentavalent antimonials, mainly sodium stibogluconate (Pentostam) and meglumine antimoniate (Glucantime). These medicines can only be administered through injection. They are toxic, with many side-effects and the treatment is given over a period of 30 days.
Why is it called dum dum fever?
The agent of the disease was also first isolated in India by Scottish doctor William Leishman (who observed the parasite in spleen smears of a soldier who died of the disease in Dumdum, Calcutta, India – hence the name dumdum fever) and Irish physician Charles Donovan, working independently of each other.
Why is it called black fever?
Visceral disease, the most devastating and fatal form of leishmaniasis, is classically known as kala-azar or the Indian name for “black fever/disease,” which is a reference to the characteristic darkening of the skin that is seen in patients with this condition.
How does kala azar spread?
Kala azar is endemic in 47 countries with approximately 200 million people at risk of infection. The parasite is spread to humans by bites from infected female sand flies. It attacks the immune system, and is almost always fatal if not treated.
Can a dog recover from leishmaniasis?
Recovery of Leishmaniasis in Dogs If caught in time, most dogs will show improvement within the first month. Symptoms will subside in a few weeks noticeably with the treatment. The worse state your pet is in, the longer it will take to recover.
What is the pathophysiology of kala azar?
Kala-Azar or Viscera Leishmaniasis is a slow progressing indigenous condition that is caused by a protozoan parasite. The disease-causing parasite belongs to the class or genus Leishmania. The parasite infects the reticuloendothelial system and may be found in abundance in bone marrow, spleen, and liver.
What is Kala-azar (viscera leishmaniasis)?
Kala-Azar or Viscera Leishmaniasis is a slow progressing indigenous condition that is caused by a protozoan parasite. The disease-causing parasite belongs to the class or genus Leishmania.
What is the treatment for kala-azar?
The treatment of kala-azar is about the killing of the parasite with effective drugs that are cheap and less toxic. Pentavalent antimonial is the first-line drug, and pentamidine and amphotericin B are the second-line drugs.
What is Kala-azar vector in India?
In India, there is only one sand fly vector of kala-azar- Phlebotomus argentipes which is the cause of kala-azar. Sandflies are tiny insects that are about ¼ the size of a mosquito. The length of a sand fly can range from 1.5 mm to 3.5 mm.
