i64 INFECTIOUS AND PARASITIC DISEASES. 



insect. From the blood, through the bites of suctorial 

 insects, the microbes of malaria, yellow fever, filariasis 

 and trypanosomiasis (sleeping-sickness), always make 

 their exit. Dengue is also believed to be conveyed in 

 this way. In typhus fever, bubonic plague, typhoid 

 fever, and the bacteriaemias generally, there is always 

 the possibility of microbes being extracted when a 

 patient is bitten. Bed-bugs may suck out the spirilla 

 in relapsing fever, to prove which the disease has been 

 produced in a monkey by inoculating it with blood 

 obtained from a bug that had bitten another monkey 

 suffering from this infection. 



In suppurative processes the micro-organ- 



SuppuRA- jgj^g causing the trouble are always ex- 

 pelled in the escaping material. In the fol- 

 lowing specific infections the offending microbe is dis- 

 charged in the pus: Erysipelas, anthrax (malignant 

 pustule), glanders (farcy), malignant oedema, gonor- 

 rhoea (ophthalmia neonatorum, urethral and uterine 

 gonorrhoea), diphtheria, syphilis, tuberculosis, tetanus 

 (lock-jaw), leprosy, actinomycosis, amoebic abscess, 

 trachoma (Egyptian ophthalmia), catarrhal conjunc- 

 tivitis, blastomycetis, etc. 



Non-specific suppurations are caused by a variety 

 of microbes, among which the streptococcus pyogenes, 

 and the several varieties of the staphylococcus, are 

 principally concerned; less frequently are found the 

 bacillus coli communis and the micrococcus tetragenus. 



