Scabies is a skin disease caused by infestation and sensitization towards Sarcoptes scabiei. It occurs easily in moist and densely-populated vicinities. This research was conducted to analyze the relationship between residential density and personal characteristics towards the incidences of scabies among students of boarding school Raudatul Ulum and Mustaqimus Sunnah, South Sumatra. This research was an epidemiological method using cross-sectional analytic approach, conducted in July 2018. The populations were all students of boarding school and the samples selected were 93 respondents with proportional random sampling. The measuring instruments were cardinal scabies physical diagnostic and questionnaire of demographic interviewing. Obtained results were then analyzed with Chi-Square, Logistic Regression Statistical Tests, and correspondence analysis. The result of scabies prevalence was 59,6% and 56,5% respectively. Logistic Regression testing result yielded the free variable bearing the most dominant influence towards scabies incidence, which was the residential density (OR: 5.850 95% CI: 2.369-14.445). The significant relationship towards the occurrence of scabies should be further investigated in order to prepare for elimination programs.

BACKGROUND: Sarcoptes scabiei mites have more than 15 genetically diverse varieties from various hosts. Identification of S. scabiei mite varieties hominis as an intervention in its prevention is still rarely done. AIM: This study aimed to observe the genetic relationship of the mite S. scabiei varieties hominis compare to the parasite S. scabiei varieties hominis in other regions. METHODS: This research used polymerase chain reaction (PCR) and sequencing methods with 16S gene-specific primers. From 32 S. scabiei samples, 22 samples were identified as varieties hominis that was marked by the appearance of the band at 132 bp. RESULTS: S. scabiei mites hominis varieties from South Sumatra (Yessi Scabies A2 and Yessi Scabies B3) have similarities with deoxyribonucleic acid (DNA) strands with S. scabiei hominis varieties from China (KJ781377 and KJ781376). In contrast, Yessi Scabies A1 has similarities with DNA strands with mite S. scabiei varieties hominis from Australia (AY493402). Still, all the DNA strands, this research is different from S. scabiei mites DNA strands hominis from Panama and Pakistan. CONCLUSION: The PCR method is advantageous and specific in identifying mites S. scabiei hominis varieties, the cause of scabies in humans.