Symptoms. 



Ill 



marked in horses. Cough is present from the start; it occurs, 

 however, only at long intervals or after external stimuli, for 

 instance, after percussion. In the stage of hepatization it ap- 

 pears painful, hence less violent, even very feeble, but it be- 

 comes markedly easy and moist with the advent of resolution. 



The course of the fever is usually very characteristic for 

 the disease in those cases which run their course without com- 

 plications. 



The temperature rises on the first day to 39.5° -41° C. 

 and remains high with slight variations during the next days 

 (febris continua — see Figs. 13 and 14). Toward the end of 



Fig. 14. Fever curve in croupous pneumonia of a horse. Lysis. Gradual increase of 

 the frequency of the pulse and respiration with the approach of the stage of resolution. 



the stage of hepatization, i. e., toward the end of the first week, 

 the_ temperature either falls rapidly within i/o to li/o days 

 (crisis — Fig. 13) or gradually, with remissions in the niorning 

 and exacerbations in the evening, so that the animal is free 

 from fever only after 2 to 5 days (lysis— Fig. 14). The fall 

 in temperature is usually preceded by a change of the dull 

 and low percussion sound into a tympanitic or loud sound. 



_ The temperature , which has fallen to normal or which is falling 

 rapidly, may, in exceptional cases, rise again on the following day; 

 it remains, however, high only for two days and then again goes down 

 (perturbatio eritica). Exceptionally the temperature may fall below 

 "normal, occasionally down to 36° C. ; this occurrence, however, is like- 



