He observed many patients with symptoms unlike those of any known disease. He also noted that houses in the region were infested with insects called barber beetles, which feed on blood.
मगर उन्होंने देखा कि ज़्यादातर मरीज़ों में ऐसे लक्षण थे जो किसी जानी - मानी बीमारी के लक्षण से बिलकुल अलग हैं ।