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High yields of ova of Schistosoma mansoni were obtained from the livers and intestines of infected mice by digestion of the homogenized tissue with the proteolytic enzyme pinguinain.
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A nonconcurrent, prospective intestinal parasitic disease study in a group of 200 foodhandlers employed in the Panama Canal Area was conducted in mid-1985 as part of an established occupational health medical surveillance program. The study included a review of laboratory testing (i.e., coprological exam), preexisting medical record data, and patient interview information to calculate estimates of incidence and risk factors associated with acquisition of Giardia lamblia and other protozoan/helminthic intestinal parasites. Significant increases in risk of infection were detected for specific native Indian and West Indian employee groups when compared with their Hispanic Panamanian (i.e., Latinos) or North American (i.e., U.S. born) counterparts. A three- to fourfold higher rate of infection was also documented during a one-year period when semiannual rather than annual examinations were conducted. No difference in the therapeutic efficacy of parasitological cure of Metronidazole versus Quinacrine was found when used in the treatment of individuals with asymptomatic G. lamblia infections (85% in both groups). The appropriateness of mass therapy of asymptomatically infected foodhandlers is discussed.
In West Africa intestinal parasites diseases and lack of food are quoted among the main causes of childhood morbidity. This study aimed to assess both the frequency and the relationships between anthropometric values and haemogramme troubles among children living in a West tropical forest area. A cross-sectional survey was tested on a sample of 262 children drawn at two levels. The parameters studied were the weight, height, age, sex, percentiles at height per age and weight per height ratios, haemogramme and intestinal parasites. The results revealed that microcyte hypochrome anemia is generally dominant in the haematological profile. The intestinal parasites carriage has a frequency higher than 68%, but has no influence on either the haematological profile or the anthropometric status. However, the haematological troubles found during that experience revealed a strong association with weight-height ratio troubles. Furthermore, malnutrition signs were observed.
The authors have conducted from November 20th 1992 to May 26th 1993 a study about the incidence of Strongyloidiasis in two pediatric units in Dakar. Direct examination followed by Lee and Baerman's concentration technic both applied to 610 stool specimen, have shown that 26.6% of children were carrying parasites. 9 cases of strongyloidiasis have been shown the incidence was 1.4%. These cases represent 5.5% and ranks at fifth position among intestinal parasitic diseases. They all come from suburbs of Dakar. Malignant forms could be easily detected among children suffering a secondary immune deficiency due to malnutrition, or corticotherapy.
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Strongyloidiasis is an intestinal parasitic disease caused by Strongyloides stercoralis. Basically, detecting larvae of S. stercoralis in feces makes definitive diagnosis. The ordinary agar plate culture method developed at our department is much simpler to handle and much more sensitive than the conventional filter paper culture method. It is considered to be the most useful method in the diagnosis of strongyloidiasis and in evaluation of the eradicating effect. Among chemotherapeutic agents, thiabendazole representing the benzimidazole compounds is most effective. However, it has a problem in safety, since its adverse effects and liver dysfunction occur with a high incidence, and it can be severe. Regarding the effects of mebendazole, albendazole and ivermectin, a study was conducted which included many patients. A high incidence of liver dysfunction was observed with mebendazole, and eradicating effect was not sufficient with albendazole. Ivermectin is different from benzimidazole compounds in a pharmacokinetic profile. However, ivermectin showed a strong anthelmintic effect with the least toxicity. We therefore consider ivermectin is the most useful drug for the treatment of strongyloidiasis.
A case of small-bowel obstruction occurred secondary to an uncommon parasitic disease, anisakiasis. Intestinal obstruction is a rare manifestation of this disease. Anisakiasis may be seen initially with nausea and vomiting or may mimic acute appendicitis or Crohn's disease. The predisposing factor in all cases is the ingestion of raw fish, and the disease is preventable by cooking fish at greater than 60 degrees C for a short time or by freezing at less than -20 degrees C for more than 24 hours. Anisakiasis should be considered in the differential diagnosis of small-bowel obstruction in patients whose diet includes raw fish.
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