Lung Plague, in Cattle. 665 



which might introduce infection under an apparently prolonged 

 incubation, or with a chronic type of the disease. Small importa- 

 tions of one or two, might be dismissed at the end of three months 

 quarantine under a ticket of leave system, under which they and 

 the herd into which they are taken can be kept track of for three 

 months more. In the larger imported herds the possibility of the 

 escape of infection under a three months quarantine is so infi- 

 nitesimal that it may be practically ignored. 



Similar precautions must be taken against the importation of 

 cattle from a country reputed to be free from the lung plague, but 

 which imports cattle from an infected country without imposing 

 the three months' quarantine. 



The use, for transportation of cattle from one part of an immune 

 country into another, of cars or boats which have been used for 

 transporting cattle in an infected country can only be permitted 

 after the vehicles in question have been thoroughly cleansed and 

 disinfected and attested so by the official experts. 



The landing in an uninfected country of hay, fodder, or cattle- 

 food of any kind, or of litter, grain bags, head ropes, manure, or 

 other article coming from an infected country must be prohibited 

 until such article shall have been thoroughly .disinfected. 



Horns, hoofs, hides, hair and other products introduced into 

 the country must be disinfected. The treatment adopted to ex- 

 clude anthrax would be amply sufficient for lung plague. 



Measures to Extirpate the Infection. Stop all accessions of 

 possibly infected cattle from outside. Proclaim the infected area, 

 prohibiting all entrance and egress of cattle, and all movement 

 of cattle from herd to herd within the area, except under special 

 license, based on the soundness of each herd for six months ante- 

 cedent. Prohibit absolutely the pasturage of cattle on public 

 highways and unfenced or insufficiently fenced places. Send to 

 instant slaughter cattle found in such places in violation of this 

 rule. Make an accurate census, with individual description of 

 each bovine animal in the infected district, and make a necropsy 

 of each such animal dying at the hands of the butcher or casually. 

 Hold the owner guilty of a misdemeanor with heavy penalty, for 

 every bovine animal that goes amissing in the infected district 

 without official post mortem examination. When an infected 

 animal is found in a herd have the whole herd, marked, appraised 



