Alhagi is a genus of Old-World plants in the family Fabaceae. They are commonly called camelthorns or manna trees. There are four accepted species, which range from northern Africa and Greece through western and central Asia to India and northern China. Extracts from the above-ground part of camel thorn have an antimicrobial effect, and they have a pronounced bactericidal effect on streptococci, staphylococci, and dysentery bacilli. Decoctions are successfully used as a gargle for acute tonsillitis.