The Canadian data in some areas may be confounded or explained by the tendency to establish indigenous communities in wooded, riparian, northern areas corresponding to the core habitat of B. dermatitidis, often with known B. dermatitidis habitats such as woodpiles and beaver constructions in the near vicinity. Communicability
Blastomycosis is not considered contagious, either among humans or between animals and humans. However, there are a very small number of cases of human-to-human transmission of B. dermatitidis related to dermal contact or sexual transmission of disseminated blastomycosis of the genital tract among spouses. History
The organisms causing blastomycosis have existed for millions of years. The pathogenic group of onygenalean fungi that give rise to conditions including blastomycosis and histoplasmosis emerged approximately 150 million years ago. The most closely related blastomycosis-causing fungi, Blastomyces dermatitidis and Blastomyces gilchristii, diverged during the Pleistocene, approximately 1.9 million years ago.At the Koster Site in Illinois, evidence pointing to possible blastomycosis infections among Late Woodland Native Americans has been identified. At that site, Dr. Jane Buikstra found evidence for what may have been an epidemic of a serious spinal disease in adolescents and young adults. Several of the skeletons showed lesions in the spinal vertebrae in the lower back. There are two modern diseases that produce lesions in the bone similar to the ones Dr. Buikstra found in these prehistoric specimens: spinal TB and blastomycosis. The bony lesions in these two diseases are practically identical.
Hypercementosis is an idiopathic, non-neoplastic condition characterized by the excessive buildup of normal cementum (calcified tissue) on the roots of one or more teeth. A thicker layer of cementum can give the tooth an enlarged appearance, which mainly occurs at the apex or apices of the tooth. Signs and symptoms
It is experienced as an uncomfortable sensation in the tooth, followed by an aching pain.It may be shown on radiographs as a radiopaque (or lighter) mass at each root apex. Cause
Can be caused by many things. A way to remember the causes is "PIG ON TAP"Local factors- 

Occlusal Trauma
Trauma
Non-functional tooth
Unopposed tooth (and impacted teeth, embedded teeth, teeth without antagonists)Systemic factors-

Idiopathic
Pituitary Gigantism
Pagets Disease
Acromegaly
Periapical granuloma
Arthritis
Calcinosis
Rheumatic feverIt may be one of the complications of Pagets disease of bone in the form of generalized hypercementosis. It may also be a compensatory mechanism in response to attrition to increase occlusal tooth height. Complications
Such deposits form bulbous enlargements on the roots and may interfere with extractions, especially if adjacent teeth become fused (concrescence). It may also result in pulpal necrosis by blocking blood supply via the apical foramen. References


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