Publications by authors named "Ruth C Scimeca"

Article Synopsis
  • Anaplasma bovis is a disease-causing agent primarily affecting ruminants and has been mostly found in Asia, the Middle East, and Africa; rare human infections have been reported, mainly due to Anaplasma phagocytophilum.
  • A study aimed to check the prevalence of an A. bovis-like agent in the Southcentral U.S. found it in 3.1% of ticks from Oklahoma, but no presence was detected in cattle blood.
  • The results suggest that the A. bovis-like agent is likely present in the U.S. and could be a potential zoonotic threat, highlighting the need for further research to identify its reservoirs and assess the human infection
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We describe here a case of the sinus roundworm, , found incidentally in a rabies-positive striped skunk () in Texas, USA. Skunks serve as a natural definitive host for this metastrongylid nematode in North America, in which infections result in observable damage to the host cranium, where adult parasites reside. Additionally, skunks are considered the primary reservoir of rabies in Texas.

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Article Synopsis
  • The Asian longhorned tick, originally from East Asia, has become invasive in regions such as Australia, New Zealand, and the United States, rapidly spreading since 2017.
  • Its ability to reproduce without mating and feed on various hosts contributes to its fast expansion, particularly affecting cattle where it can cause economic losses.
  • This report details the first finding of this tick in Oklahoma, expanding its known range further west in the U.S., although no pathogenic DNA was found in samples from affected cattle.
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Ticks, as hematophagous ectoparasites, can manipulate host immune and metabolic processes, causing tick-borne allergies such as α-Gal syndrome (AGS). Glycolipids with bound galactose-alpha-1-3-galactose (α-Gal) are potential allergenic molecules associated with AGS. Nevertheless, proteins and lipids lacking α-Gal modifications may contribute to tick salivary allergies and be linked to AGS.

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Cytauxzoonosis, a highly fatal tick-borne disease in domestic cats caused by , poses diagnostic and therapeutic challenges due to the inability to culture the parasite in vitro. This study aimed to artificially replicate infection and characterize in vitro replication kinetics. Concanavalin A-activated feline embryonal macrophages (Fcwf-4) were plated at 3-5 × 10 cells/mL and incubated with -positive blood samples from either a (1) chronically infected bobcat (), (2) chronically infected domestic cat, or (3) acutely infected domestic cat with clinical signs of cytauxzoonosis.

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Cytauxzoonosis is a severe tick transmitted protozoan disease of domestic cats, caused by Cytauxzoon felis. The disease is characterized by acute onset of high fever, depression, lethargy, inappentence, anorexia, icterus, dehydration, hemolytic anemia, and alteration of immune response. The aim of our study was to further detail the immune response of domestic cats to C.

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is a small piroplasm previously detected in coyote-hunting Greyhound dogs in California and Oklahoma. In dogs, causes clinical signs similar to other tick-borne illnesses, and if not treated it can lead to acute kidney injury and other life-threating complications. To date, the life cycle of this apicomplexan parasite has not been fully described, but suggestions of direct contact or tick transmission have been proposed.

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Passerine birds are widely distributed and adapted to various habitats, therefore they are commonly exposed to, and infected with The purpose of our project was to determine the prevalence and genotypes of in 31 different species of passerines collected as mortalities due to window collisions in North-Central Oklahoma. DNA was extracted from breast tissue and subjected to PCR with primers that amplify a portion of the B1 gene. Genotyping was based on a portion of the infected birds based on a multiplex PCR followed by RFLP of 12 markers.

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and are apicomplexan parasites that cause established and emerging diseases in humans, domestic and wild animals. These protozoans are transmitted by Ixodid ticks causing babesiosis or theileriosis, both characterized by fever, hemolytic anemia, jaundice, and splenomegaly. In North America (NA), the most common species affecting humans is , which is distributed in the Northeastern and Upper Midwestern United States (US), where the tick vector is established.

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Cytauxzoonosis is an emerging tick-borne disease of domestic and wild felids produced by infection of an apicomplexan protozoan similar to spp. Transmitted by , lone star tick, and , American dog tick, infection of in cats is severe, characterized by depression, lethargy, fever, hemolytic crisis, icterus, and possibly death. Cytauxzoonosis occurs mainly in the southern, south-central, and mid-Atlantic United States in North America, in close association with the distribution and activity of tick vectors.

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Cytauxzoonosis is a tick-borne disease of domestic cats with high mortality and narrow therapeutic window, particularly in the southcentral and southeastern United States. The causative agent is the apicomplexan protozoal parasite Cytauxzoon felis and is primarily transmitted by Amblyomma americanum, the lone star tick. Currently there is no vaccine available to prevent cytauxzoonosis and treatment is often ineffective if not initiated early enough in the course of disease.

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Black bears (Ursus americanus) are commonly exposed to Toxoplasma gondii. However, there are no reports of exposure or infection with T. gondii in black bears from Oklahoma.

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BACKGROUND In neurofibromatosis type 1 (NF1) disease, the loss of the tumor suppressor function of the neurofibromin gene leads to proliferation of neural tumors. In children, the most frequently identified tumor is the optic pathway glioma. CASE REPORT We describe the case of a 5-year-old child who was diagnosed with NF1 and optic pathway tumor onset at the age of 14 months.

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