Again, the fact that gall-bladder or appendix lesions may be the outcome of septic foci in the mouth enables us the more easily to explain the not infrequent co-existence of gout and glycosuria. For an infected gall-bladder may by extension determine a chronic pancreatitis.
Lastly, what of the relationship of local foci of infection to “gouty” synovitis and arthritis? Is one focal infection more than another particularly related to arthritides? Whatever be the true inference, if we take arthritides as a whole, nothing seems so efficient a cause of their production as oral sepsis. Accordingly, some are inclined to think that organisms, e.g., streptococcus viridans, at the roots of the teeth or others in the tonsillar crypts, pass, viâ the blood-stream, direct to the joints. Others, again, hold that, given oral sepsis, infection of the stomach and lower levels of the alimentary tract and its accessory cavities ensues. And in sequence thereto infection of the joints may take place from local foci throughout gastro-intestinal tracts.
Those who favour the view that direct infection viâ the blood from foci of oral sepsis is the more probable modus operandi are wont to produce the following points in support of their view. Arthritis, they say, is relatively rare in enteric fever. In yet another disorder, dysentery, which gives every chance of absorption from the intestine, arthritis when it occurs is seldom very acute, while in appendicitis it is distinctly uncommon.
On the other hand, we must recall that even in normal animals the alimentary and respiratory tracts, and alike the liver and kidneys, constantly afford cultures of pathogenic and non-pathogenic bacteria. Such was established by Adami and his co-workers, who moreover found that such organisms, through the agency of leucocytes, continually pass into the system, where subsequently in the healthy animal they as constantly undergo destruction.
If, however, inflammatory processes are at work, their migration into the tissues is favoured. For under such conditions leucocytes aggregate at the reactive focus, and concurrently, their migration being more active, larger numbers of bacteria achieve entry into the system. The subsequent course of events is determined by the number and virulence of the organisms that effect a lodgment in the tissues, where under favourable conditions they originate other foci of infection or sub-infection.
By sub-infection is understood the fact that microbes carried into the system undergo slight, if any, numerical increase, and do not set up foci of suppuration. Here we may note that “gouty” inflammation, however intense, never ends in pus formation. But, to resume, the bacteria, instead of multiplying, undergo lysis, and, their endo-toxins being released, the more highly specialised tissue cells in the vicinity are destroyed. Coincidently the lower grade connective tissue elements are by the self-same poisons stimulated to proliferate, and an area of chronic interstitial fibrosis is formed.
Incidentally this is interesting, inasmuch as the visceral organs in gout evince a tendency to fibrosis. But, as Gideon Wells observes, “the actual increase of uric acid in the blood and tissues in gout is so slight that we are not warranted in saying that the usual tendency to sclerosis in all the organs in gout is due to the action of uric acid rather than to some other unknown agent or agents.” In view of these revelations, is it not infinitely more likely that the chronic interstitial fibroses in gout are the outcome of such sub-infection?
The assumption gathers weight in light of the experimental proof adduced by Adami that not only tubercle bacilli, but streptococci and other organisms, taken orally, can gain an entrance into the system. Upon this basis we get a clear conception of the possible relationship of gout to local foci of infection. Thus, whether it be a condition of oral sepsis—pyorrhœa alveolaris, tonsillar sepsis, sinus disease, intestinal disorders, constipation, and so forth—we see that it is highly probable that organisms at any one of such infective foci may gain access to the blood-stream with subsequent installation of local lesions in joints or other structures.
Now, as pointed out, inflammatory states or functional derangements of the alimentary tract, whether focal or diffuse, favour the ingress into the tissues of organisms. Is it not reasonable, therefore, we ask, to suppose that the functional derangements which so commonly precede or accompany gout may modify the character of the intestinal flora, and promote their migration inwards in greater numbers? The inevitable swiftness with which relapses or exacerbations of this disorder follow even venial dietetic indiscretions distinctly favours this assumption, one, moreover, substantiated by the amelioration or immunity which follows abstention from the offending foodstuffs. The often prolonged course, too, of gout, and its marked liability to periodic recurrence, would be explicable as the outcome of a continued or intermittent series of sub-infections.