<sec><title>Objectives</title><p>Lyme disease is the most common tick-borne disease. People seek health information on Lyme disease from YouTube<sup>TM</sup> videos. In this study, we investigated if the contents of Lyme disease-related YouTube<sup>TM</sup> videos varied by their sources.</p></sec><sec><title>Methods</title><p>Most viewed English YouTube<sup>TM</sup> videos (n = 100) were identified and manually coded for contents and sources.</p></sec><sec><title>Results</title><p>Within the sample, 40 videos were consumer-generated, 31 were internet-based news, 16 were professional, and 13 were TV news. Compared with consumer-generated videos, TV news videos were more likely to mention celebrities (odds ratio [OR], 10.57; 95% confidence interval [CI], 2.13–52.58), prevention of Lyme disease through wearing protective clothing (OR, 5.63; 95% CI, 1.23–25.76), and spraying insecticides (OR, 7.71; 95% CI, 1.52–39.05).</p></sec><sec><title>Conclusion</title><p>A majority of the most popular Lyme disease-related YouTube<sup>TM</sup> videos were not created by public health professionals. Responsible reporting and creative video-making facilitate Lyme disease education. Partnership with YouTube<sup>TM</sup> celebrities to co-develop educational videos may be a future direction.</p></sec>
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Objective
This study aimed at finding epidemiological and clinical features of autochthonous Lyme borreliosis in humans through epidemiological investigations and identifying its vectors and pathogens through analysis of ticks. Method
Epidemiological investigations, including review of the retrospective medical records and patient interviews, were conducted in two cases that occurred in 2012. To identify the vectors and pathogens, ticks were collected between September 23 and October 6, 2012 from the area where the tick bite in the first patient occurred. The ticks were classified, and polymerase chain reaction (PCR) tests and cultures were performed. Results
The first patient, a 46-year-old female, visited a forest in Gangwon province, which was 900 m above sea level, where the tick bite occurred. Two weeks after the tick bite, erythema migrans (12 × 6 cm<sup>2</sup> in size) appeared on the site of tick bite, along with fever, chill, fatigue, myalgia, and arthralgia on shoulders, knees, and hips. The second patient, a 44-year-old male, visited a mountain in Gangwon province, which was 1200 m above sea level, where a tick bite occurred. One month after the tick bite, erythema migrans appeared at the site of the tick bite, along with fatigue, myalgia, and arthralgia on the right shoulder and temporomandibular joint. Indirect fluorescent antibody testing and Western blotting were carried out in these two cases for diagnosis, and positive findings were obtained. As a result, Lyme borreliosis could be confirmed. To estimate the pathogens and vectors, the ticks were collected. A total of 122 ticks were collected and only two species, <i>Haemaphysalis japonica</i> and <i>Haemaphysalis flava</i>, were identified. PCR and culture were performed on ticks. However, <i>Borrelia burgdo rferi</i> sensu lato was not isolated from any collected ticks. Conclusions
This study is significant to confirm Lyme borreliosis officially at first by the national surveillance system, although identification of the mites and pathogens failed.
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