86 EXPERIMENT STATION RECORD. 



effect of acaprin on the workmen is severe, producing serious illness in many cases. 

 In some cases the inhalation of the fumes of acaprin caused great irritation of the 

 throat and a cough which persiste<l for several weeks. Similar symptoms were 

 observed in some of the sheep which accudentally swallowed some of the solution 

 while passing through the dipping vat. The high price of acaprin and its deleteri- 

 ous effects upon the workmen who attend to the dipping are considered as rendering 

 the substance unfit for general use. 



Propliylaxis of dourine and an account of recent discoveries concerning 

 this disease, T. Buffard and G. .Schneider {Jour. Mkl. Vet. ct Zooteeh., S.ser., 5 

 {100 1), Jul II, jip. 3S5-S97, fg. 1). — Since the trypanosoma which causes this disease 

 has Ijeen discovered it has become possil)le to make a diagnosis more quickly and to 

 institute better measures for controlling the spread of the disease. The authors 

 report a number of experiments during which animals were infected with the dis- 

 ease. It was found that at times the disease may develoi^ without the appearance of 

 the symptoms by which it is usually recognized. In preventing the spread of 

 dourine the authors recommend a microscopic examination of the blood or patho- 

 logical products from suspected stallions in order to make a certain and rapid 

 diagnosis. As a further test, the blood or pathological products may be used for 

 inoculating dogs, which are considered the most suitable animals for use in experi- 

 ments in determining the nature of this disease. As soon as cases are determined, 

 it is necessary to exclude the affected animal from breeding service. 



An attempt at a classification of endoglobular hematozoa, Laveran 

 {Compt. Rt'ud. Soc. Biol. Park, 53 {1901), No. 27, pp. 79S-801).—1:\\q author recog- 

 nizes 3 genera in this group of protozoa and characterizes them under the names 

 Htemama^ba, Piroplasma, and Hjemogregarina. A table is given showing the species 

 which are referred to each of the.se genera, and the hosts in which they are found. 



Mange in cattle and horses and lice on hogs, A. T. Peters {Nebraska Sta. 

 Bui. 74, pp. J7, figs. 16). — Brief historical notes are given on the origin and distri- 

 bution of cattle mange in this country. It was first reported to the author from 

 Nebraska in 1896. The disease is apparently more serious in late fall and winter than 

 in summer, and develops the most pronounced symptoms in yearlings. The mite 

 which causes this disease is described and notes are given on its life history. 



If only a few mangy cattle are to. be treated a liquid remedy may be applied by a 

 swab, brush, or spray pump. Where large numbers of cattle are affected, however, 

 it will be necessary to construct dipping tanks, such as are already in existence in 

 many parts of the West. It is recommended that cattle be dipped twice in the fall 

 and also twice in the spring, with an interval of 10 or 12 days between the 2 dippings. 

 The substances recommended by the author for dipping cattle are chloro-naptholeum 

 and zenoleum. Experiments have been made with these dips on about 7,000 cattle, 

 with favorable results. Both substances were used in a 4 per cent solution. Slightly 

 stronger solutions may be employed. After cattle have been dipped it is recom- 

 mended that they should not be allowed to lie down in infected corrals. 



Brief notes are also given on other lice affecting cattle and a detailed description 

 presented of suitable dipping vats for treatment of large herds of cattle. 



Sarcoptic mange of horses has been known in the State since 1895. The symptoms 

 of the disease are described and it is recommended that horses be treated in the same 

 manner as cattle. Good success is reported from a single application of the dip, but 

 in severe cases it is recommended that 2 dips be applied. 



Notes are given on the lice which commonly infest hogs, especially Ihanatopinus 

 urius. Where hogs become badly infested the easiest method of freeing them of 

 these pests is to dip the animals. It is recommended that hogs be dipped every 3 or 

 4 weeks, if infested with lice. Notes are given on a number of sheep dips which 

 have been successfully used for dipping sheep and are also recommended for use on 

 hogs. 



