However it was not until 1889 that the first human case was described by Levinson when he found the Gnathostoma larva in an infested Thai woman. The lifecycle of G. spinigerum was described by Svasti Daengsvang and Chalerm Prommas from Thailand in 1933 and 1936. This delay in identification of the parasite in humans is due to the fact that humans are not a definitive host for this parasite making infection from this parasite rare. Gnathostomiasis infection is rare because the parasite must be digested when it has reached its third larvae stage, providing only a short time frame in which the parasite is capable of infecting humans. It is uncommon for the larvae to penetrate the skin of individuals exposed to contaminated food or water without ingestion. See also
List of parasites (human)
List of migrating cutaneous conditions

References
External links
Gnathostomiasis Archived 2013-02-15 at the Wayback Machine at CDC
Gnathostomiasis at eMedicine
The diffusion of BLM has been measured to 1.34 
  
    
      
        
          
            
              
                
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   in nucleoplasm and 0.13  
  
    
      
        
          
            
              
                
                  
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    at nucleoli  DNA helicases are enzymes that attach to DNA and temporarily unravel the double helix of the DNA molecule.