338 



DISEASES OF UNCERTAIN ETIOLOGY 



(4) Food Poisoning. 



Ichthyotoxismus from eating bad fisli, but those not eating 

 fish have developed it. 



Sitotoximus due to eating rice without the husks or when stale 

 or badly kept. Some blame a parasite living in the husk which 

 is ingested when the rice "is insufficiently cooked, biit it has 

 appeared where the people never eat rice. 



c d 



a, a highly milled or polished rice stained by Grams iodine solution. The starch, being 

 completely exposed, stains uniformly a dark blue. This rice will produce beriberi. 



b, an undermilled rice stained in the same way. The unstained areas show where the 

 adherent pericarp has protected the starch from the action of the iodine. This rice will 

 probably not produce beriberi. 



c, a sample of undermilled rice that contains still more pericarp. The use of this rice 

 will surely prevent the development of beriberi. 



d, the unhusked grain or "palay." When the husks are removed by hand pounding, 

 a rice like c or /^ is produced. 



(5) Food Deficiency. This is the view held most widely. 



Deficient nitrogen. The peripheral layers of the rice, lost in 

 milling, contain a vitamine substance. This is necessary for 



