Wuchereria bancrofti: effect of single and multiple larval inoculations on infection dynamics and development of clinical manifestations in non-human primate Presbytis entellus.
Identifieur interne : 007045 ( Main/Exploration ); précédent : 007044; suivant : 007046Wuchereria bancrofti: effect of single and multiple larval inoculations on infection dynamics and development of clinical manifestations in non-human primate Presbytis entellus.
Auteurs : Kumkum Srivastava [Inde] ; Satish Vedi ; Sudhir Srivastava ; Shailja Misra-BhattacharyaSource :
- Experimental parasitology [ 0014-4894 ] ; 2007.
Descripteurs français
- KwdFr :
- Animaux, Cercopithecidae (parasitologie), Culex, Diéthylcarbamazine (usage thérapeutique), Femelle, Filaricides (usage thérapeutique), Filariose lymphatique (anatomopathologie), Filariose lymphatique (parasitologie), Filariose lymphatique (physiopathologie), Filariose lymphatique (traitement médicamenteux), Humains, Interactions hôte-parasite, Macaca mulatta, Modèles animaux de maladie humaine, Mâle, Système lymphatique (parasitologie), Vecteurs insectes, Wuchereria bancrofti (physiologie).
- MESH :
- anatomopathologie : Filariose lymphatique.
- parasitologie : Cercopithecidae, Filariose lymphatique, Système lymphatique.
- physiologie : Wuchereria bancrofti.
- physiopathologie : Filariose lymphatique.
- traitement médicamenteux : Filariose lymphatique.
- usage thérapeutique : Diéthylcarbamazine, Filaricides.
- Animaux, Culex, Femelle, Humains, Interactions hôte-parasite, Macaca mulatta, Modèles animaux de maladie humaine, Mâle, Vecteurs insectes.
English descriptors
- KwdEn :
- Animals, Cercopithecidae (parasitology), Culex, Diethylcarbamazine (therapeutic use), Disease Models, Animal, Elephantiasis, Filarial (drug therapy), Elephantiasis, Filarial (parasitology), Elephantiasis, Filarial (pathology), Elephantiasis, Filarial (physiopathology), Female, Filaricides (therapeutic use), Host-Parasite Interactions, Humans, Insect Vectors, Lymphatic System (parasitology), Macaca mulatta, Male, Wuchereria bancrofti (physiology).
- MESH :
- chemical , therapeutic use : Diethylcarbamazine, Filaricides.
- drug therapy : Elephantiasis, Filarial.
- parasitology : Cercopithecidae, Elephantiasis, Filarial, Lymphatic System.
- pathology : Elephantiasis, Filarial.
- physiology : Wuchereria bancrofti.
- physiopathology : Elephantiasis, Filarial.
- Animals, Culex, Disease Models, Animal, Female, Host-Parasite Interactions, Humans, Insect Vectors, Macaca mulatta, Male.
Abstract
We earlier reported the successful experimental transmission of Wuchereria bancrofti from humans to the Indian leaf monkey (Presbytis entellus) [Misra, S., Tyagi, K., Chatterjee, R.K., 1997. Experimental transmission of nocturnally periodic Wuchereria bancrofti to Indian leaf monkey (Presbytis entellus). Experimental Parasitology 86,155-157.; Dube, A., Murthy, P.K., Puri, S.K., Misra-Bhattacharya, S., 2004. Presbytis entellus: a primate model for parasitic disease research. Trends in Parasitology 20(8), 358-360.] using a small number of animals. The present study, involving 27 langur monkeys, found the development of pathological manifestations ranging from filarial fever, lymphangitis, lymphadenitis, hydrocoele, and limb edema to minor histopathological changes in tissues after single, double, triple, or multiple inoculations of infective larvae of W. bancrofti recovered from Culex quinquefasciatus fed on human microfilaraemic blood. Thirty-eight percent of the infected langurs developed detectable microfilaraemia in their blood. Single or double larval exposure resulted in better worm establishment than multiple exposures with small numbers of larvae. All of the langurs receiving a single large inoculum and 85.71% of those receiving two inoculations harbored adult parasites. Worm establishment decreased with increasing number of larval inoculations. In all, 60% of infected langurs developed classical gross-pathological symptoms of lymphatic filariasis. Of these, 29.16% developed thickening of the lymphatics, 25% suffered from periodic rise in rectal temperature, and 16.66% developed scrotal swelling with presence of microfilariae in the hydrocoele fluid. Only one out of 25 langurs (4%) developed acute limb edema. It appeared that a single inoculum of a large number of infective larvae was able to induce maximum pathology. Fifty-six percent of the infected langurs acquired a peculiar sitting posture, retracting both the hind limbs, usually after 4-5 months of larval inoculation and eventually resulting in reduced mobility. Oral administration of diethylcarbamazine (citrate) at 12mg/kg for 12 consecutive days to one langur caused 80% suppression in microfilaraemia on day 8, killing all the adult parasites. Of the two immunosuppressed (cortisone- or prednisolone-treated) male rhesus monkeys included in the study, neither developed any of the above lymphatic symptoms or parasites after receiving larval inoculations on two or three occasions; however, a rise in rectal temperature in one of the animals was noticed. The present study thus reveals that the Indian leaf monkey, P. entellus, may serve as an ideal non-human primate model of human bancroftian filariasis for carrying out longitudinal studies on pathology, host-parasite interactions, and preclinical evaluation of candidate anti-filarial drugs or vaccines.
DOI: 10.1016/j.exppara.2006.09.005
PubMed: 17064689
Affiliations:
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Le document en format XML
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<front><div type="abstract" xml:lang="en">We earlier reported the successful experimental transmission of Wuchereria bancrofti from humans to the Indian leaf monkey (Presbytis entellus) [Misra, S., Tyagi, K., Chatterjee, R.K., 1997. Experimental transmission of nocturnally periodic Wuchereria bancrofti to Indian leaf monkey (Presbytis entellus). Experimental Parasitology 86,155-157.; Dube, A., Murthy, P.K., Puri, S.K., Misra-Bhattacharya, S., 2004. Presbytis entellus: a primate model for parasitic disease research. Trends in Parasitology 20(8), 358-360.] using a small number of animals. The present study, involving 27 langur monkeys, found the development of pathological manifestations ranging from filarial fever, lymphangitis, lymphadenitis, hydrocoele, and limb edema to minor histopathological changes in tissues after single, double, triple, or multiple inoculations of infective larvae of W. bancrofti recovered from Culex quinquefasciatus fed on human microfilaraemic blood. Thirty-eight percent of the infected langurs developed detectable microfilaraemia in their blood. Single or double larval exposure resulted in better worm establishment than multiple exposures with small numbers of larvae. All of the langurs receiving a single large inoculum and 85.71% of those receiving two inoculations harbored adult parasites. Worm establishment decreased with increasing number of larval inoculations. In all, 60% of infected langurs developed classical gross-pathological symptoms of lymphatic filariasis. Of these, 29.16% developed thickening of the lymphatics, 25% suffered from periodic rise in rectal temperature, and 16.66% developed scrotal swelling with presence of microfilariae in the hydrocoele fluid. Only one out of 25 langurs (4%) developed acute limb edema. It appeared that a single inoculum of a large number of infective larvae was able to induce maximum pathology. Fifty-six percent of the infected langurs acquired a peculiar sitting posture, retracting both the hind limbs, usually after 4-5 months of larval inoculation and eventually resulting in reduced mobility. Oral administration of diethylcarbamazine (citrate) at 12mg/kg for 12 consecutive days to one langur caused 80% suppression in microfilaraemia on day 8, killing all the adult parasites. Of the two immunosuppressed (cortisone- or prednisolone-treated) male rhesus monkeys included in the study, neither developed any of the above lymphatic symptoms or parasites after receiving larval inoculations on two or three occasions; however, a rise in rectal temperature in one of the animals was noticed. The present study thus reveals that the Indian leaf monkey, P. entellus, may serve as an ideal non-human primate model of human bancroftian filariasis for carrying out longitudinal studies on pathology, host-parasite interactions, and preclinical evaluation of candidate anti-filarial drugs or vaccines.</div>
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