Local abundance of Ixodes scapularis in forests: effects of environmental moisture, vegetation characteristics, and host abundance

Publication date: Available online 14 September 2019Source: Ticks and Tick-borne DiseasesAuthor(s): Howard S. Ginsberg, Eric L. Rulison, Jasmine L. Miller, Genevieve Pang, Isis M. Arsnoe, Graham J. Hickling, Nicholas H. Ogden, Roger A. LeBrun, Jean I. TsaoAbstractIxodes scapularis is the primary vector of Lyme disease spirochetes in eastern and central North America, and local densities of this tick can affect human disease risk. We sampled larvae and nymphs from sites in Massachusetts and Wisconsin, USA, using flag/drag devices and by collecting ticks from hosts, and measured environmental variables to evaluate the environmental factors that affect local distribution and abundance of I. scapularis. Our sites were all forested areas with known I. scapularis populations. Environmental variables included those associated with weather (e.g., temperature and relative humidity), vegetation characteristics (at canopy, shrub, and ground levels), and host abundance (small and medium-sized mammals and reptiles). The numbers of larvae on animals at a given site and season showed a logarithmic relationship to the numbers in flag/drag samples, suggesting limitation in the numbers on host animals. The numbers of nymphs on animals showed no relationship to the numbers in flag/drag samples. These results suggest that only a small proportion of larvae and nymphs found hosts because in neither stage did the numbers of host-seeking ticks decline with increased numbers on hosts. Canopy cover wa...
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research

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(Virginia Tech) Renowned tick immunobiologist Utpal Pal wants to adapt the rabies vaccination platform to produce antibodies that can protect against Borrelia burgdorferi, the bacteria responsible for Lyme disease. The intention is to apply this work to other tick-borne diseases in the future.
Source: EurekAlert! - Medicine and Health - Category: International Medicine & Public Health Source Type: news
We report a case of acute neuroborreliosis that manifested as extended isolated cervical myelitis. Not only the manifestation as isolated myelitis in the early stages of borreliosis represents a rarity, but also the strong contrast between mild clinical symptoms and pronounced imaging findings in this case is remarkable.Case Rep Neurol 2020;12:276 –281
Source: Case Reports in Neurology - Category: Neurology Source Type: research
Infection with tick borne Borrelia Burgdorferi (Lyme disease) can without treatment rarely develop into a chronic phase. Secondary Normal Pressure Hydrocephalus (sNPH) based on chronic infection with Borrelia ...
Source: BMC Neurology - Category: Neurology Authors: Tags: Case report Source Type: research
When we get an acute illness like the flu or a cold, we feel sick for a week or two and then get back to our usual lives. This is how illness is “supposed” to go. But what happens when illness doesn’t fit this bill? What do patients with chronic conditions like diabetes or multiple sclerosis, or with persistent symptoms of Lyme disease or long-haul COVID-19, do when they can’t go back to their normal lives? Having suffered from the latter two — tick-borne illnesses that have plagued me for two decades, and a case of COVID-19 that took four months to shake — I’ve learned a few lesso...
Source: Harvard Health Blog - Category: Consumer Health News Authors: Tags: Fatigue Source Type: blogs
Abstract Companion animals can become infected with tick-borne diseases (TBDs) and can become hosts of transmission to humans, thereby damaging human health. To clarify whether companion animals are infested by ticks harboring TBD pathogens in humans, we detected TBD pathogens in ticks collected from dogs and cats brought to animal hospitals in Yamagata Prefecture, Japan. Investigation of 164 adult ticks collected from 88 dogs and 41 cats during March-July 2018 revealed the predominant tick species as Ixodes ovatus (n = 95, 57.9%), followed by Ixodes nipponensis (37, 22.6%) and Haemaphysalis flava (10, 6.1%). The ...
Source: Japanese Journal of Infectious Diseases - Category: Infectious Diseases Authors: Tags: Jpn J Infect Dis Source Type: research
Publication date: Available online 25 August 2020Source: Ticks and Tick-borne DiseasesAuthor(s): Malte M. Tetens, Rasmus Haahr, Ram B. Dessau, Karen A. Krogfelt, Jacob Bodilsen, Nanna S. Andersen, Jens K. Møller, Casper Roed, Claus B. Christiansen, Svend Ellermann-Eriksen, Jette M. Bangsborg, Klaus Hansen, Thomas L. Benfield, Christian Østergaard Andersen, Niels Obel, Lars H. Omland, Anne-Mette Lebech
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research
Date: Friday, 08 21, 2020; Speaker: Travis Bourret, Ph.D., Assistant Professor, Department of Medical Microbiology&Immunology, Creighton University School of Medicine; Building: Online - Webex, twitter, Facebook Live; URL:
Source: NIH Calendar of Events - Category: American Health Source Type: events
Publication date: Available online 25 August 2020Source: Ticks and Tick-borne DiseasesAuthor(s): Chinar Osman, Liam S. Carroll, Christina Petridou, Mark Walker, Louis W. Merton, Haider Katifi
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research
To predict the risk of tick-borne disease, it is critical to understand the ecological factors that determine the abundance of ticks. In Europe, the sheep tick (Ixodes ricinus) transmits a number of important dis...
Source: Parasites and Vectors - Category: Microbiology Authors: Tags: Research Source Type: research
Ticks and mosquitoes don’t care about COVID-19 safety protocols. They don’t care that people are trying to squeeze out the last moments of this restrictive summer by getting outdoors, hiking, or just sitting on their decks at night and feeling something that’s close to normal. COVID-19 has commanded our attention and caused people to adapt their behaviors to prevent one major health concern, but it doesn’t mean others have been eliminated. “Masks and social distancing will do nothing to protect you from what ticks and mosquitoes potentially carry,” says Dr. Todd Ellerin, director of infe...
Source: Harvard Health Blog - Category: Consumer Health News Authors: Tags: Autoimmune diseases Prevention Safety Source Type: blogs
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