[On the epidemiology of recurrent and chronic bronchopulmonary diseases -- an examination of about 18,000 children. 6th report: summary of the investigation in the four districts (author's transl)].

In 3 districts of the county of Halle and in the cities of Halle and Halle-Neustadt about 18,000 children of different groups of age were examined wether they were suffering from recurrent or chronic nonspecific lung diseases (CNSLD). Among the 18,000 children we found 4.3% with lung diseases.

[Amoxicillin and its excretion into bronchial secretion (author's transl)].

Various dates on amoxicillin (resorption, distribution, elimination, tissue passage, urinary excretion) are presented. The bacterial spectrum is more fully discussed. Amoxicillin is compared with ampicillin.

[On the epidemiology of recurrent and chronic bronchopulmonary diseases-an examination of about 18000 children. 1. Planning and organization of the investigation (author's transl)].

The planning and organization of an epidemiological investigation is reported to find out the frequency of chronic nonspecific lung diseases (CNSLD) in childhood as a whole and in special groups of age. By investigating regions with different air pollution we tried to study the influence of air pollution on the frequency of childhood lung diseases. Therefore, we examined nearly 5000 children in the city of Halle and in the districts of Quedlinburg, Merseburg and Bitterfeld.

[On the epidemiology of recurrent and chronic bronchopulmonary diseases-an examination of about 18000 children. 5. Investigations in Wolfen and Bitterfeld (author's transl)].

Bitterfeld and Wolfen are towns with extremely polluted air, due to important plants of the chemical industry. In two different actions we examined 3634 children of four different groups of age. As a result we found 7,8% of them (281 children) suffering from chronic or recurrent nonspecific bronchopulmonary diseases (7,0% suffering from recurrent or chronic bronchitis, and 0,8% from bronchial asthma).

[On the epidemiology of recurrent and chronic bronchopulmonary diseases-an examination of about 18000 children. 4. Investigation in the cities of Halle and Halle-Neustadt (author's transl)].

In Halle, an old city, and Halle-Neustadt, a town built in the past 10 years, our investigation was performed on 4418 children. We ascertained chronic or recurrent nonspecific bronchopulmonary diseases in 3,1% of them. 2,4% suffered from recurrent bronchitis, 0,4% from chronic bronchitis and 0,3% from bronchial asthma.