“…11,25-29 Low income, low occupational status, and low level of education may limit access to dental care services and the use of preventive measures such as oral hygiene. 25,[27][28][29] A study by Umeda et al 7 found that risk indicators for harboring A. actinomycetemcomitans, T. forsythensis, P. gingivalis, P. intermedia, P. nigrescens, and T. denticola in four ethnic/racial groups in Los Angeles, included race/ethnicity, age, gender, time of residence in United States, smoking, frequency of professional dental care, and existing periodontal disease. Chilean subjects in the current study exhibited several of these risk indicators.…”