This disease, once supposed to be confined to the Orient, is now found to be rather widely distributed throughout the tropics, where it is sometimes very prevalent. It is caused by the presence in the system of a parasite very similar to or identical with the one causing kala-azar and is regarded by some as a modified form of that disease. The patient is affected with one or more serious sores or ulcers which usually occur on exposed parts of the body.
The parasite that causes the disease is supposed to be carried by insects either directly or indirectly.
In the latter case the insect may act as an intermediate host.
Dogs and camels are also attacked by this disease and may be sources of infection.
BIBLIOGRAPHY
complete list of books and articles dealing more or less directly with the subjects discussed in this book would be too extended for use here. For the past ten or twelve years many of the medical and biological journals have contained articles in almost every issue, discussing these subjects in some of their phases. I have selected only a few of the more important of them, and these only the English ones, confining myself mostly to those that I have personally consulted, and giving brief annotations. Many of these will be found to include very full bibliographies of the particular subject treated.
In order to avoid repetition, references are given under one head only although many might properly be included in other sections as well.