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PubMed2000

The role of eosinophils in parasitic helminth infections: insights from genetically modified mice.

Eosinophilia - an increase in the number of eosinophils in the blood or tissues - has historically been recognized as a distinctive feature of helminth infections in mammals. Yet the precise functions of these cells are still poorly understood. Many scientists consider that their primary function is protection against parasites, although there is little unequivocal in vivo evidence to prove this. Eosinophils are also responsible for considerable pathology in mammals because they are inevitably present in large numbers in inflammatory lesions associated with helminth infections or allergic conditions. In this review, Carolyn Behm and Karen Ovington outline some of the cellular and biological properties of eosinophils and evaluate the evidence for their role(s) in parasitic infections.

Animals↗
PubMed2000

Eosinophilia and helminthic infections.

Among microbial agents, helminths are the most common cause of eosinophilia. An approach to the evaluation of a patient with eosinophilia is outlined, with particular emphasis on clues in the history, examination and routine laboratory data that can help with the diagnosis. Multiple helminthic infections have been associated with eosinophilia, and the characteristic modes of spread, clinical manifestations, diagnostic tests and therapeutic considerations of these infections are discussed.

Animals↗
PubMed1979

Mebendazole.

The broad-spectrum of activity and safety of mebendazole remain, after 5 years of clinical experience, unique features of this anthelmintic. Through microtubular destruction, mebendazole kills helminths by inhibiting glucose uptake into susceptible parasites. The drug's poor absorption does not appear to affect clinical efficacy except, perhaps, in the treatment of systemic helminth infections. Mebendazole is generally considered the drug of choice for trichuriasis and has therapeutic advantages over other anthelmintics in the treatment of enterobiasis and hookworm infections. Although mebendazole is an effective agent against ascariasis, there are preferable alternatives. Among its nonapproved uses, mebendazole shows great promise in the treatment of capillariasis and hydatid disease. Further investigation is needed to establish its role in the treatment of taeniasis, Hymenolepsis nana, strongyloidiasis, trichinosis, and Dipetalonema perstans. Undoubtedly, mebendazole will find its greatest value in the treatment of patients with multiple helminth infections.

Ascariasis↗
PubMed1995

Parasites of the Abert's squirrel (Sciurus aberti) and red squirrel (Tamiasciurus hudsonicus) of New Mexico.

Between 1989 and 1991, 29 Abert squirrels (Sciurus aberti) and 45 red squirrels (Tamiasciurus hudsonicus) were collected in New Mexico and examined for parasites. Of 29 S. aberti examined, 86.2% (25/29) were infected with at least 1 parasite species. Helminths were found in 62.1% (18/29) of S. aberti; 37.9% (11/29) were infected with fleas and 37.9% (11/29) with the coccidian Eimeria tamiasciuri. Among T. hudsonicus, 82.5% of the squirrels examined were infected with at least 1 parasite. Helminths were found in 57.8% (26/45) of T. hudsonicus; 22.2% (10/45) were infected with fleas and 26.7% (12/45) with Eimeria tamiasciuri. Citellinema quadrivittati was found in squirrels of both species; 55.2% (16/29) of S. aberti were infected, with 57.8% (26/45) of T. hudsonicus carrying the parasite. Enterobius sciuri was only found in S. aberti with 17.2% (5/29) carrying the infection. One cestode, Hymenolepis sp., was found only in T. hudsonicus with 6.7% (3/45) carrying the infection. Four species of flea were found on squirrels of both species. Ceratophyllus vison was found on 6.9% (2/29) of S. aberti and 6.7% (3/45) of T. hudsonicus examined. Opisodasys robustus was found on 6.9% (2/29) of S. aberti and 8.8% (4/45) of T. hudsonicus examined. Orchopeas caedens caedens was found on 3.4% (1/29) of S. aberti and 6.7% (3/45) of T. hudsonicus examined. Orchopeas neotomae was found on 10.3% (3/29) of S. aberti and 6.7% (3/45) of T. hudsonicus examined. Two species of flea were only found on T. hudsonicus; Orchopeas leucopus was found on 2.2% (1/45) and Oropsylla idahoensis was found on 2.2% (1/45) of the T. hudsonicus examined.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗