Biomedical subjects
Publications and source records attributed to H Steinbrink.
From sendings of citizens and own examinations 9 species of fleas were found out. Ctenocephalides felis was the most frequent species, followed by Ceratophyllus gallinae and Pulex irritans. Most of the sendings came from cities. Pests and flea control dominated in the months August to October.
Cowsheds and pigsties were studied for infestation with the stable fly. 81.5% of the cowsheds, but only 20% of the pigsties were found to be infested. Both people working in the sheds and sties and villagers felt molested. The control of the stable fly proved to be not difficult.
In 1984-1986 we examined the insecticide resistance in 33 populations of Musca domestica. The average sensibility amounted to 21% with Trichlorfon, to 66% with Dimethoate and to 63% with Trichlorphenidine. For the moment, Dimethoate is the most successful insecticide in problematic stables, compared with it Trichlorfon often fails. Pest control operators have reported on first cases of inefficacy of Pyrethrum.
The German cockroach (Blattella germanica) is the prevalent species in the district of Rostock. There was also an occurrence of Blatta orientalis and, in one case, of Periplaneta australasiae. Periplaneta americana is occasionally introduced from warmer regions of the globe via containers. Extent and intensity of infestation of many buildings has increased making large-scale control measures necessary. Most control measures have been taken in food industry enterprises. The quantity of cockroach control increases with growing population density.
In the urine of a ten-year-old girl mites of the species Tarsonemus minusculus (Can et Fanz.) and Cheyletus eruditus (Schr.) were found. A following examination of the bed dust from the bed of the child produced yet two further species of house dust mites Dermatophagoides pteronyssinus (Trouess) and Tyrophagus putrescentiae (Schr.). The demonstration of Tarsonemus minusculus in this area is new, just as the hitherto unknown male of this species.
Possibilities for cockroach control in cracks and crevices. A simple pinnozzle is described which allows crack and crevice treatment. The construction of the needle attachment allows its employment in usual application equipments. This method requires higher qualification of the pest control operator and more time for application. There are less residues on surfaces in food areas and utenils. A hand duster is suitable for dust application.
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Pharaoh's ants (Monomorium pharaonis) appeared in a children's hospital and wounded the skin of the pre-mature births. Possibilities for control are discussed.
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Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.