Abstract:
:Schistosomiasis is a neglected tropical disease caused by blood-dwelling flukes of the genus Schistosoma. While the disease may affect as many as 249 million people, treatment largely relies on a single drug, praziquantel. The near exclusive use of this drug for such a prevalent disease has led to concerns regarding the potential for drug resistance to arise and the effect this would have on affected populations. In this study, we use an in vitro assay of drug sensitivity to test the effect of praziquantel on miracidia hatched from eggs obtained from fecal samples of Kenyan adult car washers and sand harvesters as well as school children. Whereas in a previous study we found the car washers and sand harvesters to harbor Schistosoma mansoni with reduced praziquantel sensitivity, we found no evidence for the presence of such strains in any of the groups tested here. Using miracidia derived from seven car washers to infect snails, we used the shed cercariae to establish a strain of S. mansoni with significantly reduced praziquantel sensitivity in mice. This was achieved within 5 generations by administering increasing doses of praziquantel to the infected mice until the parasites could withstand a normally lethal dose. This result indicates that while the threat of praziquantel resistance may have diminished in the Kenyan populations tested here, there is a strong likelihood it could return if sufficient praziquantel pressure is applied.
journal_name
Int J Parasitol Drugs Drug Resistauthors
Mwangi IN,Sanchez MC,Mkoji GM,Agola LE,Runo SM,Cupit PM,Cunningham Cdoi
10.1016/j.ijpddr.2014.09.006subject
Has Abstractpub_date
2014-09-26 00:00:00pages
296-300issue
3issn
2211-3207pii
S2211-3207(14)00029-3journal_volume
4pub_type
杂志文章abstract::The control of parasitic nematodes impacting animal health relies on the use of broad spectrum anthelmintics. However, intensive use of these drugs has led to the selection of resistant parasites in livestock industry. In that respect, there is currently an urgent need for novel compounds able to control resistant par...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2018.11.003
更新日期:2018-12-01 00:00:00
abstract::Knockdown-resistance (kdr) against pyrethroids in bed bugs (Cimex lectularis) is associated with the presence of several point mutations in the voltage-sensitive sodium channel α-subunit gene and/or an increased metabolic detoxification by cytochrome P450 monooxygenases (CYPs). In the present study, pyrosequencing ass...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2020.11.003
更新日期:2020-12-01 00:00:00
abstract::The major human soil-transmitted helminths (STH), Ascaris lumbricoides, hookworms (Necator americanus and Ancylostoma duodenale) and Trichuris trichiura have a marked impact on human health in many parts of the world. Current efforts to control these parasites rely predominantly on periodic mass administration of anth...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章,评审
doi:10.1016/j.ijpddr.2011.09.002
更新日期:2011-10-14 00:00:00
abstract::Histone deacetylase (HDAC) enzymes work together with histone acetyltransferases (HATs) to reversibly acetylate both histone and non-histone proteins. As a result, these enzymes are involved in regulating chromatin structure and gene expression as well as other important cellular processes. HDACs are validated drug ta...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2015.05.004
更新日期:2015-06-20 00:00:00
abstract::Anthelmintic resistance has emerged as an important problem in animal industries. Understanding resistance mechanisms, especially against macrocyclic lactones (MLs), is the first step in developing better diagnostic tools. Effects of several MLs including ivermectins and milbemycins were tested using two well establis...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2013.04.002
更新日期:2013-05-24 00:00:00
abstract::Acanthamoeba castellanii is a free-living protozoan pathogen capable of causing a blinding keratitis and fatal granulomatous encephalitis. Current treatment generally involves an hourly application of polyhexamethylene biguanide (PHMB) over a period of several days but this is not entirely effective against all strain...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2016.11.001
更新日期:2016-12-01 00:00:00
abstract::Haemonchus contortus is a critical parasite of goats and sheep. Infection by this blood-feeding gastrointestinal nematode (GIN) parasite has significant health consequences, especially in lambs and kids. The parasite has developed resistance to virtually all known classes of small molecule anthelmintics used to treat ...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2020.11.004
更新日期:2020-12-01 00:00:00
abstract::Infections with parasitic nematodes are among the most significant of the neglected tropical diseases affecting about a billion people living mainly in tropical regions with low economic activity. The most effective current strategy to control nematode infections involves large scale treatment programs with anthelmint...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2019.04.001
更新日期:2019-08-01 00:00:00
abstract::Isometamidium Chloride (ISM) is one of the principal drugs used to counteract Trypanosoma congolense infection in livestock, both as a prophylactic as well as a curative treatment. However, numerous cases of ISM resistance have been reported in different African regions, representing a significant constraint in the ba...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2017.10.002
更新日期:2017-12-01 00:00:00
abstract::Cryptosporidium and Toxoplasma are parasites that have caused problems worldwide. Cryptosporidium causes severe watery diarrhoea and may be fatal in immunocompromised patients and in infants. Nitazoxanide is the only agent currently approved by the FDA, but its efficacy is limited. Toxoplasmosis is also a problem in t...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2020.10.004
更新日期:2020-12-01 00:00:00
abstract::It is recognized that the clinical efficacy of single dose benzimidazoles (BZs) against the nematode, Trichuris suis of pigs and the closely related Trichuris trichiura in humans is only poor to moderate. Recent in vitro studies have indicated that a low uptake of fenbendazole (FBZ) in T. suis may be responsible for i...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2014.03.003
更新日期:2014-04-08 00:00:00
abstract::Clinical studies suggest that outcomes for hospitalised malaria patients can be improved by managed hypothermia during treatment. We examined the impact of short pulses of low temperature on ring-stage susceptibility of Plasmodium falciparum to artemisinin in vitro. The usually artemisinin-sensitive clone 3D7 exhibite...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2018.12.003
更新日期:2019-04-01 00:00:00
abstract::The need for new antimalarials is persistent due to the emergence of drug resistant parasites. Here we aim to identify new drug targets in Plasmodium falciparum by phylogenomics among the Plasmodium spp. and comparative genomics to Homo sapiens. The proposed target discovery pipeline is largely independent of experime...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2012.07.002
更新日期:2012-07-17 00:00:00
abstract::We examined faecal egg count reduction tests (FECRTs) conducted with hookworm-infected humans in Ghana in 2007 (study 1) and 2010 (study 2) in order to explore aspects of the test analysis. Some subjects showed increased FEC following drug treatment. This occurred mostly in <150 epg pre-treatment FEC subjects. We soug...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2014.01.001
更新日期:2014-01-31 00:00:00
abstract::Toxoplasma gondii, an obligate intracellular protozoan, is the causative agent of toxoplasmosis, which can cause serious public health problems. The current drugs used to treat toxoplasmosis have many limitations. This study evaluated the anti-T. gondii activity and potential mechanism of Licochalcone A (Lico A) in vi...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2018.02.006
更新日期:2018-08-01 00:00:00
abstract::The apicomplexan parasite Sarcocystis neurona is the primary etiologic agent of equine protozoal myeloencephalitis (EPM), a serious neurologic disease of horses. Many horses in the U.S. are at risk of developing EPM; approximately 50% of all horses in the U.S. have been exposed to S. neurona and treatments for EPM are...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2018.02.002
更新日期:2018-04-01 00:00:00
abstract::Drug resistance is a problem wherever livestock are raised under intensive conditions and drugs are used to combat parasitic infections. This is particularly true for the anticoccidial agents used for the prevention of coccidiosis caused by protozoa of the apicomplexan genus Eimeria in poultry. Resistance has been doc...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2014.10.002
更新日期:2014-10-25 00:00:00
abstract::Toxoplasma gondii and Cryptosporidium parvum are protozoan parasites that are highly prevalent and opportunistically infect humans worldwide, but for which completely effective and safe medications are lacking. Herein, we synthesized a series of novel small molecules bearing the diacyl urea scaffold and related struct...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2020.08.006
更新日期:2020-12-01 00:00:00
abstract::Dirofilaria immitis is a filarial nematode causing infection and heartworm disease in dogs and other canids, cats, and occasionally in humans. Prevention with macrocyclic lactones (ML) is recommended during the mosquito transmission season. Recently, ML resistance has been reported. ABC-B transporter genes are thought...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2016.04.001
更新日期:2016-08-01 00:00:00
abstract::The high level of resistance to the macrocyclic lactones has encouraged the search for strategies to optimize their potential as antiparasitic agents. There is a need for pharmaco-parasitological studies addressing the kinetic-dynamic differences between various macrocyclic lactones under standardized in vivo conditio...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2012.11.001
更新日期:2012-12-03 00:00:00
abstract::The four components present in the trypanocidal treatment Samorin, the commercially available formulation of isometamidium, were separated and purified by column chromatography. These compounds as well as the Samorin mixture and the other phenanthridine trypanocide, homidium, were tested on Trypanosoma congolense and ...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2019.01.003
更新日期:2019-04-01 00:00:00
abstract::The effect of Camellia sinensis (green tea) on the growth of Acanthamoeba castellanii trophozoites was examined using a microplate based-Sulforhodamine B (SRB) assay. C. sinensis hot and cold brews at 75% and 100% concentrations significantly inhibited the growth of trophozoites. We also examined the structural altera...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2020.05.001
更新日期:2020-08-01 00:00:00
abstract:OBJECTIVES:This study evaluated the implications of clinically acquired miltefosine resistance (MIL-R) by assessing virulence in mice and sand flies to reveal the potential of MIL-R strains to circulate. METHODS:Experimental infections with the MIL-R clinical Leishmania infantum isolate MHOM/FR/2005/LEM5159, having a ...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2020.04.004
更新日期:2020-08-01 00:00:00
abstract::Leishmania panamensis is a relevant causative agent of tegumentary leishmaniasis in several Latin American countries. Available antileishmanial drugs have several limitations including relatively high toxicity, difficult administration, high production costs and the emergence of resistance in circulating strains. Ther...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2020.08.002
更新日期:2020-12-01 00:00:00
abstract::Nematode cys-loop ligand-gated ion channels (LGICs) have been shown to be attractive targets for the development of novel anti-parasitic drugs. The ACC-1 family of receptors are a unique group of acetylcholine-gated chloride channels present only in invertebrates, and sequence analysis suggests that they contain a nov...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2018.09.004
更新日期:2018-12-01 00:00:00
abstract::Anthelmintic resistance (AR) to Fasciola hepatica is emerging worldwide. Recently, AR to the adulticide compound albendazole (ABZ) was shown in Argentina and Spain. In Sweden, ABZ treatment failure against F. hepatica was first reported in sheep in 2012. The present study tested the efficacy of ABZ and triclabendazole...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2016.06.004
更新日期:2016-12-01 00:00:00
abstract::Macrocyclic lactone (ML) anthelmintics are the most important class of anthelmintics because of our high dependence on them for the control of nematode parasites and some ectoparasites in livestock, companion animals and in humans. However, resistance to MLs is of increasing concern. Resistance is commonplace througho...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章,评审
doi:10.1016/j.ijpddr.2019.06.002
更新日期:2019-08-01 00:00:00
abstract::Soil-transmitted helminths cause more than 1 billion human infections globally, mostly in the poorest regions of the world. Control relies essentially on a limited panel of four drugs, and drug resistance might be inescapable. Nitazoxanide, an anti-infective drug, has been shown to exert anthelmintic activity in human...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2012.02.004
更新日期:2012-03-10 00:00:00
abstract::Millions of people are treated with anthelmintics to control soil-transmitted helminth infections; yet, drug distribution in the plasma and gastrointestinal tract compartments and the pathway of drug uptake into gastrointestinal nematodes responsible for the pharmacological effect are unknown. We assessed the distribu...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2017.03.005
更新日期:2017-08-01 00:00:00
abstract::Toxicity and poor adherence to treatment that favors the generation of resistance in the Leishmania parasites highlight the need to develop better alternatives. Here, we evaluated the in vitro effectiveness of hydrazone derived from chromanes 2-(2,3-dihydro-4H-1-benzothiopyran-4-ylidene) hydrazide (TC1) and 2-(2,3-dih...
journal_title:International journal for parasitology. Drugs and drug resistance
pub_type: 杂志文章
doi:10.1016/j.ijpddr.2020.06.004
更新日期:2020-08-01 00:00:00