The extracts were then tested with FasciMol-ELISA as described in Alba et al. 7.42?% depending on the screening method)No significant differences were found between FasciMol-ELISA and multiplex PCR when determining parasite positivity (in field-occurring lymnaeid snails using an immunoenzymatic assay. Keywords: and in Cuba [8, 9] and other regions of the world [10, 11]. The ecological features of (amphibious snail with wide tolerance limits) along with a strong compatibility with Cuban isolates of favour its role as the main intermediate host for this parasite in Cuba [12, 13] whereas plays only a secondary role as intermediate host of in the region [13]. In fact, only a single population of this species has been found naturally infected with the parasite [8]. In a global scenario of fasciolosis reemergence, the high prevalence of in Cuban livestock presumes a high risk of human fasciolosis due to the high rates of transmission of the parasite in nature, mainly related to human activities, e.g. cattle management. Therefore, an accurate control of the parasite is mandatory. However, several factors such as the increase of livestock production to fulfil market demands, and the absence of novel effective drugs and vaccines to counteract parasites spreading resistance to triclabendazole (treatment of choice), tackle fasciolosis control only through strategies focused on the definitive hosts [3, 14]. Instead, control strategies based on host snails are a feasible way to overcome these difficulties through integral plans that suit best the epidemiological features of each transmission focus [14, 15]. This necessarily involves surveys of snail habitats in risk areas and periodical analysis of the infection status of intermediate host populations by reliable, simple and time-saving procedures. To this end, a novel diagnostic tool, FasciMol-ELISA, designed to detect rediae. The ELISA showed a high sensitivity (100?%) and specificity (98?%) when laboratory-reared uninfected and infected and were tested [16]. The aim of the present study is Bikinin to assess the performance of the FasciMol-ELISA in monitoring populations occurring in sites at risk for fasciolosis in western Cuba, where high prevalence of infected livestock and several human disease outbreaks have been reported [4]. A multiplex PCR developed to detect in [17] was used as a reference method for classification of the samples. This DNA-based assay amplifies a specific segment of the second internal transcribed spacer of the parasite rRNA (ITS2) while amplifying simultaneously a conserved region of the gene of the snail host The microscopy-based technique of snail Bikinin dissection, which is used Bikinin routinely in field surveys of lymnaeid snails [18], was also applied. To our knowledge, this is the first study that uses an immunoenzymatic assay to detect natural infection of snails with helminths and therefore, constitutes a proof of concept to assess the applicability of immunoassays in the surveillance of parasites in their intermediate hosts. Since malacological surveys can provide useful information regarding transmission and infection risks, our results Bikinin are discussed in the context of what could be relevant to fasciolosis control via intermediate hosts. Methods Malacological survey of lymnaeid snails Screening of freshwater snail populations was carried out in water bodies of 12 livestock farms from western Cuba, from January to April 2015, in order to identify those sites harbouring habitats. Habitats were classified according to their physical features. Details of each locality sampled are given in Table?1. Table 1 Localities sampled in western Cuba and existing definitive hosts species were collected in their habitats using soft forceps and immediately placed in small containers with soaked filter paper to ensure vitality. Collected snails were carried alive to the Laboratory of Malacology of the Institute of Tropical Medicine Pedro Kour. Sites harbouring populations of the lymnaeid species were also registered. Sample processing and detection of infected with were dissected under a stereomicroscope [18] and carefully checked for intramolluscan stages of and other trematodes (parasitological microscopy-based examination). Morphological identification of the rediae and cercariae followed Frandsen & Christensen [21], Dimitrov et al. [22] and Rondelaud et al. [23] and the infection status were registered. Thereafter, each individual was divided into two equal portions with a scalpel. One of the portions was weighed, mixed with phosphate buffered saline at a ratio of 1 1?mL buffer/100?mg snail tissue, v/w and homogenised with a Potter homogeniser. The extracts Mouse monoclonal antibody to eEF2. This gene encodes a member of the GTP-binding translation elongation factor family. Thisprotein is an essential factor for protein synthesis. It promotes the GTP-dependent translocationof the nascent protein chain from the A-site to the P-site of the ribosome. This protein iscompletely inactivated by EF-2 kinase phosporylation were then tested with FasciMol-ELISA as described in Alba et al. [16]. Briefly, snail extract diluted 1/90 in phosphate buffered saline-tween 20 were individually screened in microtiter plates sensitised with 1E4 anti-rediae Mab and blocked with BSA 5?%. Plates were washed and.