Estimation of the Size of Dengue and Zika Infection Among Korean Travelers to Southeast Asia and Latin America, 2016–2017

OBJECTIVES: To estimate the number and risk of imported infections resulting from people visiting Asian and Latin American countries.METHODS: The dataset of visitors to 5 Asian countries with dengue were analyzed for 2016 and 2017, and in the Philippines, Thailand and Vietnam, imported cases of zika virus infection were also reported. For zika virus, a single imported case was reported from Brazil in 2016, and 2 imported cases reported from the Maldives in 2017. To understand the transmissibility in 5 Southeast Asian countries, the estimate of the force of infection, i.e., the hazard of infection per year and the average duration of travel has been extracted. Outbound travel numbers were retrieved from the World Tourism Organization, including business travelers.RESULTS: The incidence of imported dengue in 2016 was estimated at 7.46, 15.00, 2.14, 4.73 and 2.40 per 100,000 travelers visiting Philippines, Indonesia, Thailand, Malaysia and Vietnam, respectively. Similarly, 2.55, 1.65, 1.53, 1.86 and 1.70 per 100,000 travelers in 2017, respectively. It was estimated that there were 60.1 infections (range: from 16.8 to 150.7 infections) with zika virus in Brazil, 2016, and 345.6 infections (range: from 85.4 to 425.5 infections) with zika virus in the Maldives, 2017.CONCLUSION: This study emphasizes that dengue and zika virus infections are mild in their nature, and a substantial number of infections may go undetected. An appropriate risk assessment of zika virus infection must use the estimated total size of infections.

Entomo-epidemiological investigations on chikungunya outbreak in the Lakshadweep islands, Indian Ocean.

Background & objectives: An outbreak of chikungunya fever characterized by prolonged incapacitation in the Lakshadweep islands in Indian Ocean occurred in November 2006. We undertook the entomological and epidemiological investigations on the Chikungunya outbreak in the Lakshadweep islands, Indian Ocean. Methods: Epidemic information in the affected places was obtained from the local hospital records. Entomological observations like larval survey and the adult resting/landing collections by the hand collection methods were individually conducted in the two affected islands Andrott and Kalpeni in November and December 2006. Results: The main breeding sources of the mosquitoes were the rodent-devoured coconuts, coconut shells, areca nut soaking mud and plastic pots, discarded containers, grinding stones, metal containers and plastic containers. Aedes albopictus was pre-dominantly present in the Lakshadweep islands. Interpretation & conclusion: It is concluded that the routine campaigns need to be organized regularly within the community highlighting the potential breeding grounds of mosquitoes and the possible control methods. Source reduction strategies like destruction of coconut shells and rodent-devoured coconuts by burning or by burying them inside the ground. Ae. albopictus played major role as the vector mosquitoes responsible for the chikungunya transmission.

Biomedical publications in south Asian countries.

By and large, biomedical research is not a priority sector in south Asian countries, land of world's one-fifth population. The total number of studies published during 1990-98 from each of the south Asian countries were elicited based on MEDLINE database. The number of studies were normalised by population and physician size, and gross domestic products. The results showed that the following countries are more productive: India and Sri Lanka, when publications were normalised to population; India, Sri Lanka and Nepal when normalised to GDP; Nepal and Sri Lanka when normalised to physician number.

Health in the Huxleyan tropical island of Pala.

Huxley's Island: a novel (1962) is a parable on "realistic idealism"--set in an imaginary island situated in the Indian ocean between Sri Lanka and Sumatra, called Pala. The characters in the story include a doctor, a nurse and several patients. The general importance of health as a basic human need is well recognised. Vis medicatrix naturae, the natural healing powers of the body, are taken account of, along with psychotherapy and drugs. Prevention of illness is emphasised and doctors get paid for keeping people well. Since health and illness are influenced by a multitude of factors, "we attack on all the fronts at once ... from diet to auto-suggestion, from negative ions to medication".