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MIRA SYAHIRA RHYME 43387632 23 SEPTEMBER 2016 MICR3004

Classification

Higher order taxa

Bacteria –Terrabacteria group- Actinobacteria- Actinobacteria- Micrococcales – Micrococcaceae – Rothia [1]

Species

Rothia dentocariosa. Type of strains recorded are ATCC 17931 T , ATCC 29070 T , BCRC 12926 T , CCM 3472 T , CCM 7007 T , CCRC 12926 T , CCUG 15599 T , CCUG 35437 T , CDC X599 T , CIP 81.63 T , CIP 81.63T T , CIP 81.83 T , CIP 81.83T T , CNCTC 5686 T , DSM 20352 T , DSM 43762 T , DSM 46363 T , G.D. Roth XDIA T , GTC 267 T , HNCMB 110019 T , IAM 14816 T , IFM 1284 T , IFO 12531 T , IMET 11515 T , IMSNU 21309 T , JCM 3067 T , K21 T , KCC A-0067 T , KCTC 3204 T , KCTC 3577 T , Kloos K21 T , LMG 21025 T , NBRC 12531 T , NCDC W-858 T , NCTC 10917 T , NCTC 12102 T , NRRL B-14758 T , NRRL B-8017 T , PCM 2349 T , Roguinsky K21 T , Roth XDIA T , strain ATCC 17931 T , W.E. Kloos K 21 T , XD-1A T , XDIA T

Description and significance

Rothia dentocariosa (R.dentocariosa) was initially isolated from dental plaque and caries by Onishi in 1949 [7]. It belongs to the genus Rothia and family Micrococcaceae, which was previously thought to belong to the family Actinomycetaceae [1, 2, 5]. This genus Rothia has faced a number of taxonomic changes for the last 15 years [3]. This species of Rothia is commonly found in human oropharynx, upper respiratory tract and mouth [8]. R.dentocariosa is a non-acid fast, non-spore-forming, non-motile and non-pigmented gram positive bacteria [4]. This pleomorphic bacteria can be in either in coccoid to rod-shaped or filamentous form in anaerobic condition. The morphology varies in different culture type such that the filamentous and coccoid forms are more commonly seen in plates and fluid respectively [4].The cells can form single, paired and clustered or chained and colonial structures that are either smooth, convex type or rough form depending on cells maturity [4, 6]. R.dentocariosa prefers aerobic condition such that it would grow faster and does not require carbon dioxide or lipids for growth [4]. This facultative anaerobe bacteria was initially thought to be non-pathogenic until a case involving peri-appendiceal abscess was reported in 1975 [11]. R.dentocariosa was also found to cause other form of abscess, opportunistic pneumonia infection and predominantly endocarditis in which patients are also associated with valvular heart disease, carious teeth and periodontal disease [4, 7, 9]. Other complications resulting from endocarditis include periocoronitis, endophtalmitis, septic arthritis, bacteremia, cornel ulcer, arteriovenous fistula and intracerebral haemorrhage [3, 9]. More recently, R.dentocariosa has been associated with intrauterine foetal death [10].Hence, it is important to study this bacteria as it is present as normal oral flora that could potentially impact humans’ health.

Current research

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References

References examples

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This page is written by<MIRA SYAHIRA RHYME> for the MICR3004 course, Semester 2, 2016