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Ticks

Articles 1 - 8 of 8

Full-Text Articles in Animal Diseases

Exploring The Dynamic Adult Hard Ticks-Camel-Pathogens Interaction, John Mark O. Makwatta, Paul N. Ndegwa, Florence A. Oyieke, Peter Ahuya, Daniel K. Masiga, Merid N. Getahun Nov 2024

Exploring The Dynamic Adult Hard Ticks-Camel-Pathogens Interaction, John Mark O. Makwatta, Paul N. Ndegwa, Florence A. Oyieke, Peter Ahuya, Daniel K. Masiga, Merid N. Getahun

All Peer-Reviewed Publications

The ability of ticks to interact and adapt to differentecologies and hosts determines their vectorial competence for various pathogens; however, ticks-livestock-pathogens interaction studies are limited. With our ticks-hosts-pathogens interface studies, we found 14 species of hard ticks feeding on various livestock. Ticks showed a strong preference for one-humped camels (Camelus dromedarius). The camel nostril was the most preferred predilection site. The most prevalent tick species on camels was Hyalomma rufipes. We found two novel Amblyomma gemma variants which are distinct both morphologically and genetically from previously described Amblyomma gemma. The signature odors from camel breath and body were attractive to …

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Distribution Of Tick Species On Free-Ranging Ungulates In Northern New England, Karisa Graham Jan 2024

Distribution Of Tick Species On Free-Ranging Ungulates In Northern New England, Karisa Graham

Honors Theses and Capstones

In Northern New England, ungulates are often parasitized by ticks, which is one of the leading causes for the decline in population. Ungulates are a good host for ticks, specifically deer ticks and winter ticks, and these ticks cause many tick-borne diseases in humans as well. The purpose of this study was to assess passive sampling from harvested animals as a means of tick surveillance in Vermont and New Hampshire. Ticks were collected from deer and moose and mapped throughout the two states by ArcGIS to visualize the trends in distribution. Relative abundance was greater in southeastern Vermont, with no …

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Theileriosis In Mountain Bongo Repatriated To Kenya: A Clinical And Molecular Investigation, Richard P. Bishop, David O. Odongo, Thomas T. Dolan, Rosemary B. Dolan, Robert A. Skilton, Paul D. Sayer Jun 2019

Theileriosis In Mountain Bongo Repatriated To Kenya: A Clinical And Molecular Investigation, Richard P. Bishop, David O. Odongo, Thomas T. Dolan, Rosemary B. Dolan, Robert A. Skilton, Paul D. Sayer

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Mountain bongo (Tragelaphus euryceros isaaci) from Kenya were exported to zoological institutions in North America and Europe in the 1970s and 1980s. In the following 20-30 years bongo numbers declined in Kenya and the Mountain Bongo Repatriation Project was launched. This resulted in 18 adult bongo, descendants of the original translocated bongo, being repatriated from the United States to Kenya in 2004. These newly arrived bongo were inadvertently exposed to heavy tick infestation on release in a conservancy on the slopes of Mount Kenya. Mortality and morbidity occurred during the third week after arrival. Theileria sp. infection was apparent from …

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Survey Of Rickettsia Spp. In Ticks In Nacogdoches County, Texas, Nathaniel Blakley Apr 2018

Survey Of Rickettsia Spp. In Ticks In Nacogdoches County, Texas, Nathaniel Blakley

Electronic Theses and Dissertations

Rickettsia parkeri is an obligate intracellular pathogenic bacterium that is commonly transmitted by the Gulf Coast tick, Amblyomma maculatum. Rickettsia parkeri is the causative agent of Rickettsia parkeri rickettsiosis, which is a disease characterized by nonspecific symptomology. Significant effort by numerous research groups focuses on determining the geographic distribution of potential vectors of this pathogen. The purpose of this study was to study A. maculatum populations in Nacogdoches County, Texas, for the presence of Rickettsia parkeri. Over a two-year period, 49 ticks were collected in Nacogdoches county and taxonomically identified. The DNA was extracted using DNeasy Blood and Tissue …

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Can Prescribed Fire Reduce Tick Parasitism Of Birds?, Leslie A. Sterling, Kim Medley, Katie Westby, Solný Adalsteinsson Apr 2018

Can Prescribed Fire Reduce Tick Parasitism Of Birds?, Leslie A. Sterling, Kim Medley, Katie Westby, Solný Adalsteinsson

Undergraduate Research Symposium Posters

Tick-borne diseases spread through enzootic transmission cycles that often involve ticks parasitizing bird hosts. Some avian species are competent reservoirs, amplifying the pathogens that cause tick-borne illnesses in humans. Prescribed burns in forests have the potential to reduce tick-borne disease risk if they limit interactions between ticks and infectious wildlife hosts. Although prescribed burns are increasingly being used for a variety of habitat management purposes, little is known about how they affect tick-host interactions. We hypothesize that if prescribed fires reduce tick abundance, then birds in burned forest plots will host fewer ticks than birds in unburned forest plots. Experimental …

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Understanding The Patterns Of Distribution And Abundance Of Lyme Disease Carrying Ticks And Their Hosts, Julio Ruiz Apr 2017

Understanding The Patterns Of Distribution And Abundance Of Lyme Disease Carrying Ticks And Their Hosts, Julio Ruiz

Honors Theses

Lyme disease is caused by the bacteria Borrelia burgodorferi and spreads to their hosts by the bites of infected Ixodes scapularis ticks. In the United States, Lyme disease is typically found in the northeast but in recent years the disease has begun to be found further south and west than previously before. Yet, today, little information can be found about the patters of distribution and abundance of ticks and their host. The main goal of this research work was to expand the knowledge of the abundance and distribution of ticks and host. Based on tick collection data obtained from Maikis …

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The Role Of Hyalomma Truncatum On The Dynamics Of Rift Valley Fever: Insights From A Mathematical Epidemic Model, Sansao A. Pedro, Shirley Abelman, Henri E.Z. Tonnang Mar 2017

The Role Of Hyalomma Truncatum On The Dynamics Of Rift Valley Fever: Insights From A Mathematical Epidemic Model, Sansao A. Pedro, Shirley Abelman, Henri E.Z. Tonnang

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To date, our knowledge of Rift Valley fever (RVF) disease spread and maintenance is still limited, as flooding, humid weather and presence of biting insects such as mosquitoes, have not completely explained RVF outbreaks. We propose a model that includes livestock, mosquitoes and ticks compartments structured according to their questing and feeding behaviour in order to study the possible role of ticks on the dynamics of RVF. To quantify disease transmission at the initial stage of the epidemic, we derive an explicit formula of the basic reproductive number, R0. Using the concept of Metzler matrix, we state necessary conditions for …

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Characterization Of Protective Antigens From The Midgut Of Amblyomma Variegatum Ticks, J. K. Kinyua, E. O. Osir, D. O. Ogoyi, E. K. Nguu Dec 2002

Characterization Of Protective Antigens From The Midgut Of Amblyomma Variegatum Ticks, J. K. Kinyua, E. O. Osir, D. O. Ogoyi, E. K. Nguu

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Separation of midgut membrane proteins from the tick, Ambylomma variegatum, using a non-ionic detergent (Triton X-114), resulted in two protein fractions, namely DET (detergent) and AQ (aqueous). In immunoblotting analysis with polyclonal antibodies against these fractions, 4 proteins (Mr ∼ 27,000, 67,000, 86,000 and 95,000,) and 2 proteins (Mr ∼ 54,000 and 67,000) were detected in the DET and AQ fractions, respectively. Three of the DET fraction proteins Mr ∼ 27,000, 67,000 and 95,000 were glycosylated since they bound to the lectin, concanavalin A. In 2-dimensional gel electrophoresis, the AQ and DET fraction proteins were found to be acidic in …

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