Tropical storm off Myanmar coast sweeps reefs in Ritchie's Archipelago, Andaman.

The reefs in some islands of Andaman and Nicobar suffered severe damage following a tropical storm in the Bay of Bengal off Myanmar coast during 13-17 March 2011. Surveys were conducted at eight sites in Andaman, of which five were located in the Ritchie's Archipelago where maximum wind speeds of 11 m s(-1) was observed; and three around Port Blair which lay on the leeward side of the storm and had not experienced wind speeds of more than 9 m s(-1). Corals in the shallow inshore reefs were broken and dislodged by the thrust of the waves. Significant damage in the deeper regions and offshore reefs were caused by the settlement of debris and sand brought down from the shallower regions. The fragile branching corals (Acropora sp.) were reduced to rubbles and the larger boulder corals (Porites sp.) were toppled over or scarred by falling debris. The reefs on the windward side and directly in the path of the storm winds were the worst affected. The investigation exposes the vulnerability of the reefs in Andaman to the oceanographic features which generally remain unnoticed unless the damage is caused to the coastal habitats.

Oral health status and practices of 5 and 12 year old Indian tribal children.

OBJECTIVES: To assess oral health status and practices of 5- and 12-year-old Tribal school children. METHODS: A total of 418, 5-year-old children and 327, 12-year-old children were enrolled Information on demographic characteristics of participants along with oral health behavior was collected. Clinical data were collected on dental fluorosis, periodontal status, dental caries and treatment needs. Dean's index criterion was used to assess dental fluorosis. Community Periodontal Index (CPI) for periodontal conditions and Dentition status and treatment needs for dental caries were recorded. RESULTS: Between meal sugar consumption was high (100%). None of the children in both the age groups had visited trained health personnel for dental treatment. Dental fluorosis prevalence in 5- and 12-year olds was 11.9% and 22.9% respectively. Bleeding on probing and calculus was common between both the age groups. A low mean number of healthy sextants were found and this decreased with age. Mean dmft/DMFT values for 5- and 12-year olds were 4.13 +/- 3.90 and 1.15 +/- 1.62. Significant caries index (SIC) scores for 5- and 12-year olds were 7.17 +/- 4.30 and 3.78 +/- 3.21 respectively. CONCLUSION: The present study reveals high sugar consumption, dental fluorosis, poor oral hygiene, and untreated dental disease of tribal children. Under these circumstances, the implementation of preventive programs including restriction of sweets in school premises for the tribal children is the key to good oral health.