1998
DOI: 10.1017/s0022149x00016436
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Abstract: Morphometric and chaetotactic studies were carried out on the body and cephalic regions of the rediae of Fasciola hepatica (Trematoda: Fasciolidae) in order to precisely identify the different redial generations of this trematode in Lymnaea truncatula under experimental infection. At day 49 post-exposure at 20°C, the length of the redia was significantly higher in the first group of the first generation (R1a) compared with successive generations, R1b, R2a and R2b/R3a. The width of the body was similar in the R… Show more

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Cited by 27 publications
(12 citation statements)
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References 9 publications
(12 reference statements)
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“…Indeed, the developmental pattern of redial generations was dependent on the behaviour of the R1a redia after its exit from the sporocyst. If this R1a redia remained alive throughout snail infection, the usual development of redial generations occurred (Augot et al 1998). In contrast, if this mother redia died during week 2 or week 3 of snail infection, the development of generations was unusual and resulted in a lower redial burden (Augot et al 1999).…”
Section: Methodsmentioning
confidence: 97%
“…Indeed, the developmental pattern of redial generations was dependent on the behaviour of the R1a redia after its exit from the sporocyst. If this R1a redia remained alive throughout snail infection, the usual development of redial generations occurred (Augot et al 1998). In contrast, if this mother redia died during week 2 or week 3 of snail infection, the development of generations was unusual and resulted in a lower redial burden (Augot et al 1999).…”
Section: Methodsmentioning
confidence: 97%
“…The most differentiated larval forms of F. hepatica and/or P. daubneyi found in most infected snails were cercaria-containing rediae and free cercariae; in the other snails, immature rediae were noted. Cercariaecontaining rediae of F. hepatica possess a well-developed pharynx, collar rings and pairs of appendages in the third posterior part of their bodies [5]. In contrast, the rediae of P. daubneyi are shorter with a small pharynx, and their bodies lacked a collar and appendages [2].…”
Section: Investigations In Snailsmentioning
confidence: 99%
“…Because of the frequent movements of live rediae, the dimensions were only determined when the larvae were completely relaxed. Three categories of rediae for each species of Fasciola were considered in the present study according to the criteria used by Dinnik and Dinnik (1956), or by Rakotondravao et al (1992) to identify the rediae of F. gigantica, and by Augot et al (1998Augot et al ( , 1999 for those of F. hepatica. These categories are: (1) mother rediae appearing from the sporocyst first (R1a), (2) mother rediae appearing from the sporocyst second (R1b), and (3) daughter rediae from R1a (R2a).…”
Section: Methodsmentioning
confidence: 99%
“…In the case of F. hepatica, morphometric studies on the body and cephalic region of rediae were carried out by Augot et al (1998Augot et al ( , 1999 to identify their different generations. However, the values given for the rediae of both Fasciola in the previous reports are difficult to compare, as each study was performed under different experimental conditions (temperature, miracidial dose, or shell height of snails at exposure, for example).…”
Section: Introductionmentioning
confidence: 99%