In the treatment of ground itch the usual application is a zinc oxide ointment containing 10 grains of salicylic acid to the ounce.
Barlow recommends a 3% salicylic acid solution in alcohol.
CHAPTER XXII
FILARIAL INFECTIONS
General Considerations
The filarial worms are thread-like nematodes, with a thin cylindrical oesophagus, which live in various parts of the body and may or may not give rise to disease conditions. It is one of the most remarkable facts in animal parasitology that a person may harbor numerous adult filariae and myriads of embryos without in any way manifesting symptoms of the infection. In most of the filarial worms the female has a double uterus with the uterine opening near the anterior extremity.
Fig. 94.—Geographical distribution of Filariasis.
It has been proposed to designate the filarial embryo by the term microfilaria, reserving the generic name Filaria for the adult parasite. This may be convenient for differentiation but zoölogical nomenclature does not permit different names for adults and embryos. While there have been almost 20 different filarial species reported for man there is, in some instances, doubt as to the correctness of the observation, and again, a well recognized species has at times been considered as a new species and given a new name.