133 
Accidental or Facultative Parasites 
out almost its entire length was marked by bloody bruises. The 
papillse on these places were destroyed, although the walls were 
not entirely perforated. In the appendix were found two or three 
dead larvae. Alessandri (1910) has likewise shown that the larvae 
cause intestinal lesions. 
According to Graham-Smith, Austen (1912) 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. 
Anthyomyiidae—The characteristic larvae of two species of Fannia 
( = Homalomyia or Anthomyia, in part) (fig. 101) are the most com¬ 
monly reported of dip¬ 
terous larvae causing intes¬ 
tinal myasis. Hewitt 
(1912) 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 
100. Fannia canicularis (x4). After Graham-Smith. 
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 
(1914), of a woman whose illness began fourteen years previously 
with nausea and vomiting. After several months of illness she began 
passing larvae 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 larvae 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 
