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Updated: May 1, 2025
It is not necessary to do more than name some of the other organisms that are known to be pyogenic, such as the bacillus pyocyaneus, which is found in green and blue pus, the micrococcus tetragenus, the gonococcus, actinomyces, the glanders bacillus, and the tubercle bacillus. Most of these will receive further mention in connection with the diseases to which they give rise.
At any stage the disease may be arrested and the glands remain for long periods without further change. It is possible that the tuberculous tissue may undergo cicatrisation. More commonly suppuration ensues, and a cold abscess forms, but if there is a mixed infection, the pyogenic factor being usually derived from the throat, it may take on active features.
Syphilitic diseases of bone are much less common in practice than those due to pyogenic and tuberculous infectious, and they show a marked predilection for the tibia, sternum, and skull. They differ from tuberculous affections in the frequency with which they attack the shafts of bones rather than the articular ends, and in the comparative rarity of joint complications.
In #typhoid fever#, joint lesions result from infection with the typhoid bacillus alone or along with pyogenic organisms, and run their course with or without suppuration; there is again a remarkable absence of symptoms, and attention may only be called to the condition by the occurrence of dislocation.
If the tonsils are enlarged they should not be removed at the same time, as, by so doing, there is a risk of pyogenic infection from the throat being carried to the wound in the neck, but they should be removed, after an interval, to prevent relapse of disease in the glands.
DISEASES: Errors of development Bacterial diseases: Pyogenic; Gonorrhœal; Tuberculous; Syphilitic; Acute rheumatism Diseases associated with certain constitutional conditions: Gout; Chronic articular rheumatism; Arthritis deformans; Hæmophilia Diseases associated with affections of the nervous system: Neuro-arthropathies; Charcot's disease Hysterical or mimetic affections of joints Tumours and cysts Loose bodies.
When pyogenic organisms gain access to a mucous membrane, such as that of the bladder, urethra, or middle ear, the usual phenomena of acute inflammation and suppuration ensue, followed by the discharge of pus on the free surface.
When the lumen of a tubular organ, such as the appendix or the Fallopian tube is blocked also, the action of pyogenic organisms is favoured and suppuration ensues. #Pus.# The fluid resulting from the process of suppuration is known as pus. In its typical form it is a yellowish creamy substance, of alkaline reaction, with a specific gravity of about 1030, and it has a peculiar mawkish odour.
#Diseases caused by the Staphylococcus Aureus.# As the majority of pyogenic diseases are due to infection with the staphylococcus aureus, these will be described first. #Acute osteomyelitis# is a suppurative process beginning in the marrow and tending to spread to the periosteum. The disease is common in children, but is rare after the skeleton has attained maturity.
In the knee, excision is rarely necessary; but in the elbow it may be called for to obtain a movable joint. In #inherited syphilis# the earliest joint affections are those in which there is an effusion into the joint, especially the knee or elbow; and in exceptional cases pyogenic infection may be superadded, and pus form in the joint.
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