Two infected
B. germanica
were transferred into a
container with sterile food and four steril
e nymphs.
After growth of nymphs, they were found to be
contaminated by
Salmonell
a. One of these
cockroaches was maintained in culture and had
Salmonella
10
months later
.
Devi and Murrag
[
21
]
studied more than
200
cockroaches and they showed that
Salmonell
a
were
isolated from
4.1%
of them
.
Cloarec
et al.
[
22
]
found that
54%
of all bacteria identified in
cockroaches were pathogenic. Kopanic
et al.
[
23
]
studied the presence of
Salmonella
in commercial
poultry feed and found that
Salmonella
conta
-
minated five
of
45
food products
.
In this research
,
we found more than
70%
of cockroaches collected