1. Synergistic effects of essential oils and antibiotics
on overcoming antibiotic resistance in Staphylococcus
Antibiotic resistant Staphylococcus aureus, such as methicillin-resistant S. aureus (MRSA), are a major public health problem
throughout the United States. Previous studies in the
laboratory examined the colonization rate of S. aureus in
medical students at LECOM utilizing molecular, epidemiological, and microbiological
experiments. Ongoing studies, including Masters Thesis
projects, are determining if essential plant oils, such as cinnamon cassia oil, can overcome
antibiotic resistance in S. aureus isolates. Previous projects have examined the synergistic effect of cinnamon
cassia oil and erythromycin on erythromycin-resistant S.
aureus, and current projects are examining the synergistic effect of various oils, including
oregano oil and red thyme oil, and oxacillin on inhibiting growth of MRSA. Current studies are being conducted
in collaboration with Youngstown State University to examine the effect of antibiotic use in acne
patients on the antibiotic resistance profiles of S. aureus isolates.
and Distribution of tick-borne diseases in Ixodes
scapularis and Dermacentor variabilis ticks found in Erie County, Pennsylvania
The major focus of this project is to determine the prevalence of Borrelia burgdorferi and Babesia microti infection in Ixodes scapularis (black-legged) ticks, formerly known as Ixodes dammini (deer) ticks, and Dermacentor
variabilis (dog) ticks and the risk of infection in human populations. Ixodes scapularis
transmits both the bacterium that causes Lyme disease, Borrelia burgdorferi, and the parasite, B. microti, which causes human babesiosis. Lyme disease is the most common vector-borne disease in the United
States, and our recent studies show that greater than 50% of ticks collected throughout Erie County
carry B. burgdorferi.
The initial symptoms of Lyme disease include flu-like symptoms and a bulls-eye rash, and
chronic symptoms can involve the joints, heart, and brain.
Babesiosis manifests as fever and chills with accompanying fatigue and muscle pain. Because the parasite infects red blood cells, anemia is often a
complication of infection. While babesiosis is not often
associated with severe complications in specific populations, such as the elderly and
immunocompromised individuals, the infection can be serious and even fatal. Completed and current studies are being conducted on Presque Isle
State Park to ascertain the prevalence of B. burgdorferi-
and B. microti-infected ticks with follow-up studies
conducted in all of Erie County that will include screening for the presence of B. burgdorferi and B. microti, and other co-infections
such as Anaplasma phagocytophilum and Rickettsia
rickettsii. These studies involve collaborations between
the Laboratories of Human Pathogens and the Erie County Department of Health.
3. Public Health Projects
Public Health projects in the laboratory have
examined primary care physician awareness and perception of Lyme disease in Erie County and,
separately, risk groups for contracting sexually transmitted infections. In addition, a Paul Ambrose Scholar-sponsored project in the
laboratory involves determining the impact of oral health care on academic performance in
4. Microbiology Virtual
This project focuses on acquisition of high-definition digital
photographs for use with clinical case scenarios. As part of the project, students culture
microorganisms on various media and prepare microscope slides for digital photography. Clinical
case scenarios are then written based on these photographs.