Strongyloides stercoralis: Un parásito subestimado

Evaluation of techniques for the diagnosis of Strongyloides stercoralis in human immunodeficiency virus (HIV) positive and HIV negative individuals in the city of Itajaí, Brazil

“…Other researchers found that the agar plate method is more efficient when compared to other techniques traditionally adopted in clinical laboratories [13]. According to Hernadez-Chavarria [19], Baermann's and agar plate's methods give similar results in the search for S. stercoralis, and both were more efficient than other methods used to find this helminth.…”

“…The frequency of this parasite might be underestimated, since characteristic symptoms are not always noticeable [19]. Feltz et al [20] considers that the larvae of this helminth are often difficult to find in stools, as they are excreted in minimal amounts and intermittently by the host, therefore requiring sensitive detection techniques.…”

“…The Harada-Mori culture method makes use of the ability of S. stercoralis to enter a freeliving cycle of development, but it is rarely adopted as a standard procedure in clinical parasitology laboratories [1]. The Baermann technique, which takes advantage of the hydrotropism of nematode larvae, is believed to be a more sensitive method to perform the diagnosis of strongyloidiasis [19]. However, this method uses a funnel or a flask to deposit the fecal material from each sample, which is cumbersome.…”

Epidemiological aspects of strongyloidiasis in Brazil

“…The failure to diagnose this parasitosis is reflected in the frequent reports of fatal cases associated with hyperinfections, brought on by corticosteroid therapy. The similarity between corticosteroids and an ecdyses hormone of the parasite, which promotes maturation of infective larvae in the intestine of the patient, is a possible explanation for this association (Hernandez-Chavarria, 2001). Thus, the serological methods present a good alternative for early diagnosis and for evaluating the effectiveness of treatment (Sato et al 1995; Paula et al 2000; Siddiqui and Berk, 2003; Costa-Cruz, 2005; Page et al 2006; Sudré et al 2006; Varatharajalu et al 2011).…”

Ivermectina subcutánea en el tratamiento de un síndrome de hiperinfección por Strongyloides stercoralis

“…La estrongiloidiasis es una enfermedad causada por el nemátodo S. stercoralis que es endémico en las regiones rurales de los países tropicales y subtropicales 5 . Se desconoce su prevalencia, pero se estima que afecta entre el 10 y el 40 % de la población mundial, llegando a alcanzar hasta el 60 % en poblaciones de bajo nivel socioeconómico, en especial, aquellas que se dedican a la agricultura 6 .…”