Full resolution (JPEG) - On this page / på denna sida - Contributions to the Biology and Morphology of Spiroptera (Gongylonema) Neoplastica n. sp.
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In all these rodents the nematode was only observed in the upper
portion of the alimentary canal covered with squamous-celled epi-
thelium, in rabbits and guinea-pigs only in the gullet, in rats and
mice moreover, in the fundus of the stomach, which in these animals repre-
sents the continuation of the gullet, and occasionally in the epithelium of
the tongue and mouth; whereas no other part of the digestive tube
contained nematodes.
In order to ascertain whether any other species of cockroaches than P. americana
and P. orientalis might be able to serve as a host, experiments were made on Blatta
germanica.
For about 2 months (some of them from ^^/i — ^^/a, some from ^’’li — ’"li, and
others from ^V’4 — ^^i(\ 1913) a great number of Blatta germanica were fed on rat’s excre-
ments containing eggs of the Spiroptera. These cockroaches, in the muscles of which
in a few cases after the feeding typical coiled-up nematodes were found, were con-
sumed by black and white laboratory rats and white mice.
Black and I! Each rat fed on infected
white rats Blatta germanica
Number Number of Bl. germ.
The rat died or was killed
Number of Spiroptera
found in the fundus
of the stomach
47 days after the feeding
4 (3 9 le?)
58 - -
4 (2 9 2 d)
16 — —
1
41 - —
; 3 (9)
Control experiments: Rats fed on non-infected cockroaches {Blatta germanica)
126
93-114
O
In both of them Spir-
optera and epithelial
hyperplasiawere found
Control experiments: Mice fed on non-infected cockroaches {Blatta germanica)
13
14- 92
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