Article
Microbiology
Hanna J. Laukaitis, Triston T. Cooper, Chanakan Suwanbongkot, Victoria Verhoeve, Timothy J. Kurtti, Ulrike G. Munderloh, Kevin R. Macaluso
Summary: This study assessed genetic mutants of Rickettsia felis in a flea transmission model to identify genes involved in vector infection. The alteration of sca1 expression resulted in unique infection phenotypes, with the mutant strain showing enhanced growth kinetics in vitro but significantly reduced loads during flea infection, leading to limited transmission potential.
Article
Biochemistry & Molecular Biology
Luther Van der Mescht, Sonja Matthee, Conrad A. Matthee
Summary: The study revealed that the taxonomy of cat fleas is controversial, requiring more sampling data to determine the taxonomic status of the subspecies C. f. damarensis.
MOLECULAR PHYLOGENETICS AND EVOLUTION
(2021)
Article
Parasitology
Eric Tielemans, Prescillia Buellet, David Young, Alta Viljoen, Julian Liebenberg, Joe Prullage
Summary: NexGard(R) Combo is a novel topical endectoparasiticide formulation for cats, containing esafoxolaner, a purified enantiomer of afoxolaner with insecticidal and acaricidal properties, combined with eprinomectin and praziquantel. Experimental studies have shown that this formulation is effective against adult and immature stages of Ctenocephalides felis fleas.
Article
Chemistry, Medicinal
Damien Banuls, Jessie Brun, Jean-Louis Blua, Marie Christine Cadiergues
Summary: A study found that the biological plant-based food supplement Bioticks (thyme, rosemary, lemon balm, fenugreek, wormwood, and lemongrass extracts) can be used as a natural product to control fleas in pets. The group supplemented with Bioticks showed a progressive and steady decrease in flea population, while the control group remained stable. The efficacy of Bioticks compared to the control group ranged from 27% to 77% at different time points.
Article
Biochemistry & Molecular Biology
Edmund J. Norris, Rui Chen, Zhilin Li, Werner Geldenhuys, Jeffrey R. Bloomquist, Daniel R. Swale
Summary: This study found that nootkatone exerts its toxicity on fruit flies through its action as a GABA receptor antagonist, and cross-resistance with other insecticides exists.
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
(2022)
Article
Parasitology
Eleonor A. Castro-Janer, Guilherme M. Klafke, Andre Diaz, Florencia Fontes, Florencia Baraibar
Summary: Resistance of Rhipicephalus microplus to pyrethroids and fipronil is increasing in South America, with mutations in target site genes being associated with resistance. The study emphasizes the importance of genetic screening to understand resistance mechanisms in tick populations.
VETERINARY PARASITOLOGY
(2021)
Article
Multidisciplinary Sciences
David Eads, Travis Livieri, Tyler Tretten, John Hughes, Nick Kaczor, Emily Halsell, Shaun Grassel, Phillip Dobesh, Eddie Childers, David Lucas, Lauren Noble, Michele Vasquez, Anna Catherine Grady, Dean Biggins
Summary: This study evaluates the use of a grain bait laced with 0.005% fipronil for flea control and plague mitigation in black-tailed prairie dogs (BTPDs). The results show that the fipronil grain effectively suppresses fleas on BTPDs and improves their body condition and reproduction. During a plague outbreak, the use of fipronil grain protected BTPDs and significantly reduced their population on untreated habitats. The application of fipronil grain is also faster compared to dusting burrows.
Article
Environmental Sciences
Shabana Wazir, Sarfraz Ali Shad
Summary: Pesticides are widely used in agriculture to control pests, diseases, and weeds, but their overuse and misuse have led to resistance issues, environmental contamination, and threats to human health. This study on a cotton dusky bug population exposed to fipronil showed significant resistance development, with recommendations for strategies like proper use, rotation, and high-dose application to mitigate resistance and negative impacts.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Parasitology
Yu Zhang, Yu Nie, Yuan-Ping Deng, Guo-Hua Liu, Yi-Tian Fu
Summary: The cat flea Ctenocephalides felis is a significant ectoparasite in cats and dogs worldwide. There has been controversy over its taxonomic status, but isolates from China and the USA were found to be the same subspecies C. f. felis. The mitochondrial genome sequences provide useful molecular markers for further study on the taxonomy and systematics of C. felis.
Article
Parasitology
Conrad A. Matthee, Anandi Bierman, Boris R. Krasnov, Sonja Matthee, Luther van der Mescht
Summary: This study conducted a metagenetic analysis of flea samples collected from different sampling sites in South Africa, and found that the bacterial diversity of the parasites is influenced by host species and environmental factors. Differences in microbiome compositions were observed between different flea species and across geographic sampling sites, with temperature and humidity identified as potentially important environmental factors.
Article
Immunology
Noor Azrizal-Wahid, Mohd Sofian-Azirun, Van Lun Low
Summary: The study found a high prevalence of bacterial infection in cat fleas, with Bartonella and Rickettsia being the most common. Infected populations demonstrated lower nucleotide and haplotype diversities compared to uninfected populations, with lower haplotype numbers observed in infected populations.
COMPARATIVE IMMUNOLOGY MICROBIOLOGY AND INFECTIOUS DISEASES
(2021)
Article
Immunology
Jianhai Yin, Frederick Yamba, Canjun Zheng, Shuisen Zhou, Samuel Juana Smith, Lili Wang, Hongmei Li, Zhigui Xia, Ning Xiao
Summary: Multiple mutations involved in insecticide resistance in An. gambiae populations in Sierra Leone were detected in the kdrW, A296G rdl, and ace-1 alleles in the present study. It is necessary to monitor vector susceptibility levels to insecticides used in this country and update the insecticide resistance monitoring and management strategy.
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
(2021)
Article
Environmental Sciences
Rosemary Perkins, Martin Whitehead, Wayne Civil, Dave Goulson
Summary: Research indicates the presence of pesticide residues from companion animal parasiticides in some English rivers, posing potential environmental risks to aquatic ecosystems; elevated levels of fipronil and imidacloprid at specific sites are likely due to household drainage entering the waterways.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Parasitology
Eric Tielemans, Tomoko Otsuki, Tara Cheesman, Fiona Selmes, Anthony Pfefferkorn, Joe Prullage
Summary: Esafoxolaner, a purified enantiomer of afoxolaner, combined with eprinomectin and praziquantel, showed high efficacy in eliminating fleas in cats without causing any significant health abnormalities in four field studies conducted in the United States, Europe, Japan, and Australia.
Article
Entomology
Ben-Jie Li, Kun-Kun Wang, Dong-Ping Chen, Ying Yan, Xu-Ling Cai, Hui-Min Chen, Ke Dong, Fei Lin, Han-Hong Xu
Summary: The study revealed that two RDL genes in diamondback moths have antagonistic effects on the action of fipronil, suggesting that enhanced expression of the fipronil-resistant gene PxRdl2 may be a new mechanism of fipronil resistance in insects.