Publications by authors named "Jaree Johnson"

Article Synopsis
  • The West Nile virus (WNV) Koutango lineage (WN-KOUTV) has been isolated from phlebotomine sandflies in Kenya, expanding understanding of this virus found primarily in mosquitoes.
  • This study involved sampling sandflies, identifying species, isolating the virus, and analyzing its genetic sequences to understand its evolutionary relationships and variations.
  • Results indicated WN-KOUTV shows unique genetic traits and replicated effectively in both mammalian and mosquito cell lines, which could imply the sandflies might play a role as potential vectors for the virus.
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Phleboviruses are an emerging threat to public health. Recent surveillance efforts in Kenya have unveiled novel phleboviruses. Despite these efforts, there remain knowledge gaps.

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Article Synopsis
  • Ticks are significant ectoparasites that transmit various human diseases, including Lyme disease and anaplasmosis, making them the second most important vector after mosquitoes.
  • This study analyzed the bacterial content of ticks collected from different regions in Kenya, using advanced genomic techniques to classify the bacterial species present.
  • Key findings included the dominance of Rickettsia and Coxiella species in the tick samples, along with the identification of bacteria linked to several human infections, highlighting the need for further research on tick-borne diseases in Kenya.
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We report the sequencing of two viruses, Phasi Charoen-like phasivirus (PCLV) and Fako virus (FAKV), which were detected in a pool of from Kenya. Analysis showed a high similarity of PCLV to publicly available PCLV genomes from Kenya. FAKV showed a high genetic divergence from publicly available FAKV genomes.

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Background: The unmet demand for effective malaria transmission-blocking agents targeting the transmissible stages of Plasmodium necessitates intensive discovery efforts. In this study, a bioactive bisbenzylisoquinoline (BBIQ), isoliensinine, from Cissampelos pariera (Menispermaceae) rhizomes was identified and characterized for its anti-malarial activity.

Methods: Malaria SYBR Green I fluorescence assay was performed to evaluate the in vitro antimalarial activity against D6, Dd2, and F32-ART5 clones, and immediate ex vivo (IEV) susceptibility for 10 freshly collected P.

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Adult mosquito surveillance and field trials evaluated selected commercially available ultraviolet black-light (BL) and light-emitting diode (LED) traps at three sites where vivax malaria is endemic from May to October 2015 in northwestern Republic of Korea. Collections totaled 283,929 adult mosquitoes (280,355 [98.74%] females and 3,574 [1.

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A survey of reptile-associated ticks and their infection status with severe fever with thrombocytopenia syndrome (SFTS) virus was conducted to determine the relative abundance and distribution among lizards, skinks, and snakes in the Republic of Korea (ROK). In total, 132 reptiles, including 49 lizards (two species), 15 skinks (one species), and 68 snakes (eight species) were collected. In total, 84 ixodid ticks belonging to two genera (Ixodes and Amblyomma) were collected from 28/132 (21.

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Data on nymphal Ixodes scapularis ticks submitted by the public to the University of Rhode Island Tick Research Laboratory for testing from 1991 to 2000 were compared with human case data from the Rhode Island Department of Health to determine the efficacy of passive tick surveillance at assessing human risk of Lyme disease. Numbers of ticks submitted were highly correlated with human cases by county (r = 0.998, n = 5 counties) and by town (r = 0.

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Synopsis of recent research by authors named "Jaree Johnson"

  • - Jaree Johnson's recent research primarily focuses on the characterization and surveillance of emerging viruses and pathogenic bacteria in arthropods, particularly in Kenyan ecosystems, highlighting the public health implications of these findings.
  • - Key studies include the characterization of the West Nile virus Koutango lineage from sandflies and the isolation of the Bogoria virus, emphasizing the need for further understanding of their epidemiology and potential health threats.
  • - Additionally, Johnson's work includes metagenomic analysis of ticks to detect pathogenic bacteria and the investigation of antimalarial compounds, illustrating a comprehensive approach to addressing vector-borne diseases in East Africa.