138 Accidental or Facultative Parasites 



out almost its entire length was marked by bloody bruises. The 

 papillae on these places were destroyed, although the walls were 

 not entirely perforated. In the appendix were found two or three 

 dead larvae. Alessandri (19 10) has likewise shown that the larva? 

 cause intestinal lesions. 



According to Graham-Smith, Austen (19 12) has recorded a case 

 of myasis of the nose, attended with a profuse watery discharge of 

 several weeks duration and pain, due to the larvae of Piophila casei. 

 Anthyom3riidae — The characteristic larvae of two species of Fannia 

 { — Homalomyia or Anthomyia, in part) (fig. 10 1) are the most com- 

 monly reported of dip- 

 terous larvae causing intes- 

 tinal myasis. Hewitt 

 (19 12) has presented a 

 valuable study of the bio- 

 nomics and of the larvae 

 of these flies, a type of 

 what is needed for all the 

 species concerned in my- 

 asis. We have seen two 

 cases of their having been 

 passed in stools, without having caused any special symptoms. 

 In other instances their presence in the alimentary canal has given 

 rise to symptoms vaguely described as those of tapeworm infestation, 

 or helminthiasis. More specifically, they have been described as 

 causing vertigo, severe headache, nausea and vomiting, severe 

 abdominal pains, and in some instances, bloody diarrhoea. 



One of the most striking cases is that reported by Blankmeyer 

 (19 14), of a woman whose illness began fourteen years previously 

 with nausea and vomiting. After several months of illness she began 

 passing larvas and was compelled to resort to enemas. Three years 

 previous to the report, she noticed frequent shooting pains in the 

 rectal region and at times abdominal tenderness was marked. There 

 was much mucus in the stools and she "experienced the sensation 

 of larvas crawling in the intestine." Occipital headaches were 

 marked, with remissions, and constipation became chronic. The 

 appetite was variable, there was a bad taste in the mouth, tongue 

 furred and ridged, and red at the edges. Her complexion was sal- 

 low, and general nervousness was marked. As treatment, there 

 were given doses of magnesium sulphate before breakfast and at 



100. Fannia canicularis Cx4). After Graham-Smith. 



