Studies on the mode of hookworm infection. Experiments on mastication and deglutition of raw vegetable infected with Necator americanus larvae

Abstract

In the daily life of humans Necator americanus larvae is admitted into the human stomach orally along with food and drink. Although this is a matter of everyday occurrence, few researchers have done analysis or examinations. The author noted this fact and made the following two experiments on the infection mode in the human body:1. Raw vegetables contaminated by Necator americanus larvae were given to four volunteers, masticated and swallowed. After 15 minutes the volunteers rinsed the oral cavity with 30ml water and drank the water. The following conclusion was reached: Eosinophilie was observed in their blood picture and fertilized eggs were found in the feces, however no one complained of subjective symptoms. By expelling, 3, 4, 5 and 8 Necator americanus were obtained respectively.2. Raw vegetables contaminated by Necator americanus larvae were given to four volunteers, masticated and swallowed. Immediately after that the volunteers rinsed the oral cavity with 700ml water, spawed, again rinsed the oral cavity with another 350ml water and drank. The following conclusion was reached: Eosinophilie was observed in the blood picture of two out of four volunteers, fertilized eggs were found in the feces of one volunteers were free of subjective symptoms. By expelling, 2 Necator americanus could be found.