In Indonesia, leptospirosis often causes outbreaks. Three important sources of transmission of leptospirosis are the environment contaminated with leptospira, the presence of rats and presence of livestock as reservoirs. This study aims to determine the reservoir that plays a role in the leptospirosis transmission in increased case areas of leptospirosis in the Pagedangan Ilir Village, Kronjo Sub-district, Tangerang. Rat traping was done twice. Each trapping was done two times, in consecutive days. Livestock sampling was also conducted in the study area. Rat and livestock serum specimens were collected for leptospirosis detection using MAT, while rat kidneys were collected for PCR test. Leptospirosis detection was performed by PCR and MAT. The results of the first and second rat traping showed relative density of 17% and 20% in the houses, as well as 14% and 10% in outdoor area. Rat traped consist of two species, Rattus norvegicus and Rattus tanezumi. The prevalence of pathogenic leptospira in rat (with PCR assay) was 33% in the first trap and 26% in the second trap. The MAT test showed a positive 14% on R. norvegicus in the first trap, but negative in the second trap. While livestock did not show PCR positive, but one serological positive sample (by MAT) with low titers (1:20) was found against the serovar Robinsoni

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Dengue fever (DF) is a health problem in Indonesia. The spread of DF occurs through mosquito vectors. Vector control is one of important methods in dengue prevention. However, the occurence of insecticide resistance leads the need of new inovation of botanical insecticide, such tobacco (Nicotiana tabacum L). The research aimed to know larvicidal effectivity of tobacco extracts against Aedes aegypti larvae, and also analyzed nicotine content of tobacco leaves which collected from three sites: Semarang, Temanggung, and Kendal; used  experimental design and carried out on March-December 2013. Tobacco leaves was extracted with etanol then tested to Aedes aegypti 3rd instar larvae. The results showed that tobacco leaves from Temanggung was the most active as larvicides, then were followed from Semarang and Kendal. The analysis result showed that to reach 90% death from total number of larvae samples (LD90), required tobacco extract of Kendal at concentration 447ppm, Semarang 241 ppm, and Temanggung 212 ppm. Larvicidal effects of tobacco leaves extract was unproportional to the content of nicotine, such as Semarang (4,69%), Temanggung (3,61%), and Kendal (1,85%).

Leptospirosis merupakan penyakit zoonosis disebabkan bakteri Leptospira patogenik dan berpotensi menyebabkan kematian pada manusia. Tikus sebagai reservoir utama Leptospira kebanyakan diteliti di kawasan perkotaan atau pedesaan di sekitar permukiman. Sebaliknya, penelitian leptospirosis pada tikus endemis jumlahnya sedikit. Penelitian ini bertujuan untuk mengidentifikasi jenis tikus endemis Sulawesi sebagai reservoir Leptospira di Kabupaten Bulukumba, Pangkep dan Luwu Timur. Penelitian ini merupakan bagian dari Rikhus Vektora tahun 2017 dengan menggunakan perangkap hidup untuk menangkap tikus di enam ekosistem berbeda pada tiap kabupaten. Seluruh tikus tertangkap diidentifikasi secara morfologis yang selanjutnya diuji Microscopic Agglutination Test (MAT) dan Polymerase Chain Reaction (PCR). Hasilnya diperoleh berbagai tikus endemis seperti Rattus marmosurus, Rattus hoffmanni, Bunomys chrysocomus, Bunomys andrewsi dan Bunomys coelestis terinfeksi leptospirosis. Hasil penelitian menunjukkan catatan baru beberapa jenis tikus endemis Sulawesi terinfeksi leptospirosis. Kondisi ini perlu diwaspadai karena terdapat potensi penularan leptospirosis di habitat hutan dari tikus endemis tersebut.

Bantul is one of leptospirosis endemic areas which has been reported the cases every year and the presence of rats is an important risk factor relating to leptospirosis incidence in Bantul. Therefore, the role of rats as reservoir was examined in three types of ecosystems: forest, non-forest, and coastal ecosystems. Rat trapping was carried out using 100 single livetraps which were distributed in 9 locations: 2 points in the forest, 5 points in the non-forest, and 2 points in the coastal ecosystem. The rats were identified and their kidneys were collected and preserved in 70% alcohol medium. Leptospira were detected in the kidney by using PCR method. A number of 196 rats were obtained during the study. Most of them were commensal rats obtained from settlements ecosystems. Rattus tanezumi was the dominant species in the three ecosystems, but the highest infection rate of leptospira pathogen was in R.norvegicus. Coastal ecosystems were contained more infected rats, where the main habitat were mangrove forests. Based on these results, rats have great potency in leptospirosis transmission in Bantul, especially in settlements and coastal areas although leptospirosis cases were reported rarely in study area. Nonetheless, awareness of transmission should be disseminated since the presence of pathogenic leptospira in rats is very high. Keywords: leptospirosis, rat, reservoir, ecosystem, Bantul Abstrak Kabupaten Bantul merupakan salah satu daerah endemis leptospirosis yang sejak lama melaporkan kasus ini setiap tahunnya dan keberadaan tikus merupakan faktor risiko penting yang mempengaruhi kejadian leptospirosis di Kabupaten Bantul. Oleh karena itu peranan tikus sebagai hewan reservoir diteliti di tiga jenis ekosistem yaitu ekosistem hutan, non-hutan, dan pesisir. Penangkapan tikus dilakukan menggunakan perangkap tunggal sebanyak 100 buah yang disebar di 9 titik lokasi, meliputi dua titik di ekosistem hutan, lima titik di ekosistem non-hutan, dan dua titik di ekosistem pesisir. Tikus tertangkap diidentifikasi kemudian organ ginjalnya dikoleksi dan diawetkan dalam medium alkohol 70%. Bakteri leptospira dideteksi pada specimen ginjal dengan metode PCR dari total 196 tikus diperoleh selama penelitian. Sebagian besar tikus diperoleh dari ekosistem dekat pemukiman dan semuanya merupakan tikus komensal. Rattus tanezumi merupakan spesies dominan di ketiga ekosistem, namun persentase infeksi leptospira patogen paling tinggi terdapat pada R. norvegicus. Ekosistem pesisir mengandung tikus terinfeksi leptospira patogenik paling tinggi, dengan habitat utama hutan mangrove. Berdasarkan hasil ini maka tikus berpotensi besar menularkan leptospirosis di Kabupaten Bantul, terutama di daerah pemukiman dan pesisir. Meskipun kasus leptospirosis di daerah penelitian sedikit sekali dilaporkan, namun kewaspadaan terhadap penularan perlu dilakukan sedini mungkin karena leptospira patogenik yang terkandung dalam tikus tergolong tinggi. Kata kunci: leptospirosis, tikus, reservoir, ekosistem, Bantul