249 results for author: Dr. Daniel Cameron
Researchers have primarily studied travel-related illnesses in individuals travelling from high-income countries (such as the United States) to low- and middle-income countries. But now as vector-borne diseases, including Lyme disease, become a growing threat in the USA, researchers are switching their attention to the dangers now faced by travelers visiting the States.
Tick-borne pathogens have expanded into new geographical territories across the United States resulting in a greater incidence of tick-related diseases. Gathering data to understand patterns of exposure to tick bites and the risk of disease on a national level is becoming increasingly important. As a result, researchers have teamed up with citizen scientists (members of the public) to help collect samples and data.
What happens if there are atypical findings in Lyme disease? A case report by Sharma from the Mayo Clinic in Minnesota describes a 45-year-old man who presented to the emergency room with weakness, chills and oral pseudomembrane (which can be caused by thrush), along with multiple cellulitic-appearing skin lesions.
Life seemed simpler for doctors treating Lyme disease before the discovery of numerous pathogens in ticks. The Centers for Disease Control and Prevention (CDC) now reports that “a single tick can transmit multiple pathogens, including bacteria, viruses, and parasites.”  In fact, between 2004 and 2016, the CDC identified 7 new tick-borne microbes capable of infecting humans.
The Lyme spirochete Borrelia burgdorferi can invade the central nervous system causing neuroborreliosis. The most common symptoms include headaches, neck stiffness, facial palsy, and peripheral neuropathy. But the disease can, on rare occasions, also cause eye-related problems. “We present a case of neuroborreliosis manifesting with diplopia [double vision],” Dixit and colleagues write. 
The blacklegged tick has four life stages - egg, larva, nymph and adult. After it hatches, the tick must eat a blood meal (host) at every stage in order to survive. Researchers have long believed that adult female ticks could not transfer pathogens to their eggs. Therefore, larval ticks were considered pathogen-free and harmless. A new study, however, sheds light on disease transmission between life stages and suggests that we take these tiny, microscopic larvae a bit more seriously.
I left Minnesota in 1982 to begin a medical residency in New York. At that time, I had no knowledge of tick-borne pathogens existing in my home state, let alone the seven that are now being reported.  I have treated patients with Lyme disease and associated illnesses for the past 31 years, and have family members in Minnesota who have become ill from tick-borne diseases, so this study and its findings are of particular interest.
A recent case report of a 75-year-old Chinese man with Lyme disease highlights the importance of following-up with patients. The man, who was admitted to St. John’s Riverside Hospital in Yonkers, NY, did not exhibit the typical symptoms of Lyme disease. And, initial laboratory tests were negative.
Eastern Tennessee, which encompasses the Tennessee Valley, has long been considered a non-endemic region for Lyme disease. Before 2006, the blacklegged I. scapularis tick, was unreported in this area.  Several years later, this all changed.
Dermatomyositis (DM) is a serious autoimmune condition typically requiring immunosuppressive therapy. In the journal Cureus, the authors describe the case of a 76-year-old-female with a DM-like presentation who responded to antibiotic treatment for Lyme disease.