Dengue Hemorrhagic Fever (DHF) is a disease caused by Dengue virus. In 2016, the number of DHF patients in areas of Health services of Rowosari was 247 cases, IR 289.6/100.000 populations and the highest number of the patients was from Meteseh Village. The most usual mechanism happened in the vertical transmission, transovarial infection, from adult mosquito to the egg. The study was conducted to describe of entomological status of House Index (HI), Container Index (CI), Breteau Index (BI), House index (HI), Ovitrap Index (OI) of larvae as well as transovarial infection in Aedes sp. The research method was descriptive method by conducting test to the entomology status of DHF incidence. Based on the survey in Meteseh sub-village (XVI), a result found that average House Index 8.99%, Container Index 2.88%, Breteau Index 16.40%, HI 8,99 Ovitrap Index 35.46% with the egg density at 1.023 eggs. The identified mosquitoes were 30, and from the identification result of Aedes sp., two Aedes species were found, 28 Aedes aegypti,and only 2 Aedes albopictus. The transovarial infection in Aedes sp. using ELISA method was found 6 mosquito samples which were positive of dengue virus, with the detail in neighborhood 01 (1 sample), neighborhood 02 (2 samples), neighborhood 03 (3 samples). DHF in Meteseh Sub village in Semarang City was probably happened because correlated with transovarial infection.

<p><em>The use of cypermethrin insecticide is one of the strategies in vector control that has been carried out by the Port Health Office of Karimun Regency. It is necessary to evaluate the use of insecticides because of the threat of resistance in controlling dengue hemorrhagic fever. The purpose of this study was to determine the resistance of Aedes albopictus mosquitoes to cypermethrin insecticides in the Meral Port area at the Port Health Office of Karimun Regency. This type of research was a quasi-experimental with a posttest only control group design. The population of this study was Aedes albopictus mosquitoes in the Meral Port area while the samples taken were 100 Aedes albopictus mosquitoes. The results showed that the resistance status of the Aedes albopictus mosquito to cypermethrin in the Meral Harbor area was in the vulnerable category with a mortality percentage of &gt;98%. The Port Health Office of Karimun Regency is expected to be able to evaluate and follow up regularly on vector control activities that have been carried out in the Meral Port area and the need to periodically test mosquito susceptibility to insecticides with different methods. It is necessary to rotate the use of insecticides for mosquito control and re-do mosquito nest eradication (PSN) in the Meral Port area.</em><em></em></p>