Humidity and temperature have been considered important factors affecting the infectivity of Fasciola hepatica to its molluscan host. One hundred and thirty laboratory-reared Lymnaea humilis were exposed for 4 hr to the miracidia of F. hepatica over a pH range from 4.0 to 10.0, and their rates of survival were compared with 130 similarly treated but unexposed control snails. All control snails died within 24 hr at pH 4.0, but they showed better survival at pH 5.0–10.0. Their sensitivity to solutions with high and low pH, however, was increased if kept in the presence of F. hepatica miracidia. Snails exposed at pH 5.0 died within 24 hr, whereas most other pHs also affected survival such that by day 18 only those snails exposed at pH 7.2 remained alive. The increased sensitivity of the snails to pH could be explained by a damage-mediated release of parasite enzymes, because infectivity was highest at pHs associated with the lowest host mortality.
Skip Nav Destination
Article navigation
June 2006
Research Article|
June 01 2006
Exposure to Fasciola hepatica Miracidia Increases the Sensitivity of Lymnaea (Fossaria) humilis to High and Low pH
I. Cruz-Mendoza;
I. Cruz-Mendoza
aDepartamento de Parasitología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, México 04510 D.F., México
Search for other works by this author on:
E. Naranjo-García;
E. Naranjo-García
bDepartamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México
Search for other works by this author on:
M. T. Quintero-Martínez;
M. T. Quintero-Martínez
aDepartamento de Parasitología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, México 04510 D.F., México
Search for other works by this author on:
F. Ibarra-Velarde;
F. Ibarra-Velarde
aDepartamento de Parasitología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, México 04510 D.F., México
Search for other works by this author on:
D. Correa
D. Correa
cMedicina Experimental, Instituto Nacional de Pediatría, Secretaría de Salud, Apartado Postal 70483, Mexico City, Mexico, D.F.
Search for other works by this author on:
J Parasitol (2006) 92 (3): 650–652.
Citation
I. Cruz-Mendoza, E. Naranjo-García, M. T. Quintero-Martínez, F. Ibarra-Velarde, D. Correa; Exposure to Fasciola hepatica Miracidia Increases the Sensitivity of Lymnaea (Fossaria) humilis to High and Low pH. J Parasitol 1 June 2006; 92 (3): 650–652. doi: https://doi.org/10.1645/GE-3542RN.1
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Sign in via your Institution
Sign in via your InstitutionCiting articles via
CERCARIAL LONGEVITY AND INFECTIVITY OF BOLBOPHORUS DAMNIFICUS, WITH NOTES ON METACERCARIAL PERSISTENCE AND SITE SPECIFICITY IN CHANNEL AND HYBRID CATFISH
Mackenzie A. Gunn, Peter J. Allen, T. Graham Rosser, David J. Wise, Matt J. Griffin
DETECTION OF SPLENDIDOFILARIA SP. (ONCHOCERCIDAE:SPLENDIDOFILARIINAE) MICROFILARIA WITHIN ALASKAN GROUND-DWELLING BIRDS IN THE GROUSE SUBFAMILY TETRAONINAE USING TAQMAN PROBE-BASED REAL-TIME PCR
Stephen E. Greiman, Robert E. Wilson, Briana Sesmundo, Jack Reakoff, Sarah A. Sonsthagen
OCCURRENCE OF EUSTRONGYLIDES EXCISUS (NEMATODA:DIOCTOPHYMATIDAE) IN EUROPEAN PERCH (PERCA FLUVIATILIS) AND GREAT CORMORANT (PHALACROCORAX CARBO) IN LAKE ANNONE, NORTHERN ITALY
Aurora Rusconi, Paola Prati, Roldano Bragoni, Michele Castelli, Umberto Postiglione, Sara Rigamonti, Davide Sassera, Emanuela Olivieri
REVIEW OF THE ROLE OF PARASITIC NEMATODE EXCRETORY/SECRETORY PROTEINS IN HOST IMMUNOMODULATION
Ogadinma K. Okakpu, Adler R. Dillman
REVIEW OF DIOCTOPHYME RENALE: ETIOLOGY, MORPHOLOGY, BIOLOGY, ECOEPIDEMIOLOGY, PATHOGENESIS, SYMPTOMATOLOGY, DIAGNOSIS, TREATMENT, AND PREVENTION
Zully Hernández Russo, Jorge Cárdenas Callirgos, Alberto García-Ayachi, Eric J. Wetzel