1116 EXPERIMENT STATION RECORD. 



Observations on Bilharziosis among- animals in India, R. E. Montgomery 

 {Jour. Trop. Vet. Sri., 1 {1906), No. 1, pp. 15-46, pis. 2).— The characters of the genus 

 Bilharzia or Schistosomum are mentioned in some detail. The form which occurs 

 commonly in cattle is Schistosomum bods. 



Particular attention is given in this article to bilharziosis in the horse. The author 

 had opportunity to make a number of post-mortem examinations on affected horses 

 in the plains and hill regions. In addition to the blood parasite which is described 

 as new under the name S. indicum, various tapeworms, flukes, and roundworms were 

 found as well as bots. Many of the cases under observation were complicated with 

 surra. The abdominal cavity was found to be in a state of general congestion, as 

 well as the liver and pancreas. The intestinal tract is also the seat of various patho- 

 logical lesions. The blood parasite may best be obtained from the portal vein of the 

 liver. 



A brief bibliography relating to blood parasites in the horse and ass is appended 

 to the article. 



Prevention of sheep pox, D. D. Garcia (Gac. Med. Zool., SO (1906), No. 4, pp> 

 51-54). — On account of the wide distribution of this disease the importance of prac- 

 tical methods for its control is quite evident. The author calls attention to the use 

 of a preventive and curative serum against sheep pox. 



Dipping- as a means of preventing ovine diseases, F. A. Yerxey (Natal Agr. 

 Jour, and Mm. Bee, 9 (1906), No. 1, pp. 11, 12). — Since Amblyomma hebrseum is the 

 species of tick which is concerned in carrying heartwater, it is recommended that 

 sheep be dipped for the destruction of this tick in order to control the disease. 



Sheep botfly, E. Thierry (Jour. Agr. Prat, n. ser., 10 (1905), No. 37, pp. 344, 345, 

 fig. 1) . — The appearance and distribution of this insect are briefly outlined. No 

 curative nor preventive remedies are known which are practical and effective. The 

 palliative measures usually recommended are briefly discussed. 



Some common parasites of sheep (Dept. Agr. and Tech. Instr. Ireland Jour., 6 

 (1906), No. 2, pp. 295-299, pis. 2). — A discussion is presented of scab mite, sheep 

 ticks, nostril fly, sheep maggots, and biting lice, remedies being recommended for 

 the control of each one of these troubles. 



The life history of the twisted wireworms (Haemonchus contortus) of 

 sheep and other ruminants, B. H. Ransom ( U. S. Dept. Agr., Bur. Anim. Indus. 

 Circ. 93, pp. 7, figs. 2). — The common stomach worm of sheep is described in its 

 various stages and particular attention is given to a summary of its life history. 



It appears that the sheathed embryos of this parasite on grass in infested pastures 

 are capable of great resistance toward cold and desiccation. It is evident, therefore, 

 that the parasite is not destroyed in pastures by the cold weather of winter. The 

 life history of this worm is comparatively simple. The eggs in the feces of infested 

 animals hatch and the young crawl up the stems of grass where they become covered 

 with the sheath and are later taken into the stomach of sheep in grazing. Feeding 

 experiments were carried out which showed that the worm is in a condition to 

 develop in the stomach of sheep when eaten along with grass. 



The best method of cleaning up infested pastures consists in burning the grass. 

 It is quite uncertain how long a time must be allowed for the starvation of the 

 embryos and vermifuges can not be depended upon to expel the worms entirely 

 from infested sheep. Experiments are in progress to test the method of raising 

 lambs free from infection. 



Swine plague, Schmidt (Berlin. Tierarztl. Wchnschr., 1905, No. 51, pp. 865-869).— 

 This is a controversial article in which attention is called to the more or less incom- 

 patible claims made by various investigators and to the recent discoveries made by 

 the Bureau of Animal Industry in regard to a form of hog cholera caused by a filter- 

 able virus. An editorial note is appended to the article in which it is stated that 



