[History of control measures against bovine tuberculosis--contributions from the Institute of Microbiology and Contagious Diseases of the Tierärztlichen Hochschule Hannover].

A review of history and development of research and control of bovine tuberculosis is given on the occasion of Kurt Wagener's 100th birthday with special reference to his and his co-workers contributions to this subject. The topics as well concern the critical discussion of Ostertag's control measures and their replacement by Bang's methods as the importance of bovine tuberclebacilli as origin of human infections.

[Microbiological risks in animal carcass removal and utilization for human and animal health].

Hygienic requirements must be correlated to the practical conditions to remove infectious bacteria. In practice no health risk for men and animals is obvious.

[Detection of Chlamydia psittaci in vaginal discharge of cows: a necessary enlargement of bacteriologic diagnosis for the etiologic clarification of fertility disorders in the female cow].

Vaginal discharge from 119 dairy cows from 59 herds was examined bacteriologically, including application of the IDEIA Chlamydia test, to detect genus-specific chlamydial LPS-antigen. A putrid quality of specimens was closely correlated with isolation of Actinomyces pyogenes (p < 0.001).

[The effect of herd and animal factors on the detection of complement-binding antibodies against Coxiella burnetii in cattle].

To determine the prevalence of bovine Coxiella (C.) burnetii infections in Northern Lower Saxony, blood serum obtained from a total of 2160 cattle was examined for antibodies against C. burnetii using the complement fixation test (CFT).

Endometritis in cattle experimentally induced by Chlamydia psittaci.

On the day of estrus, eight virgin heifers received intrauterine inoculations of yolk sac propagated Chlamydia psittaci strain BovEnd 11/88 isolated from the uterus of a slaughter cow. All heifers developed purulent vaginal discharge which persisted for 3 to 7 weeks. Chlamydiae or chlamydial antigen were detected in vaginal and uterine discharges of infected animals by culture or Capture ELISA, while other bacterial pathogens were not found.

[Salmonella in animal feed].

A review on the occurrence of salmonella in feed of animal origin is presented. As a main result, the predominating serovars in recent epidemic situation, S. typhimurium and S.

[Intestinal Chlamydia psittaci infection of cattle: frequency and technical aspects of the cultural detection of the agent].

With the purpose to evaluate the prevalence of latent chlamydial infections in cattle, 190 animals were examined for fecal shedding of chlamydiae. From the feces of 42 animals (22.1%) Chlamydia (C.

[Public control of contagious animal diseases--effect over changing times].

A survey of the development of public control of animal diseases in Germany is made. The control of contagious diseases on the basis of confederation law has a history of more than hundred years. The knowledge and experience collected during this time are described.

Studies on the efficiency of absorbed bovine PPD in tuberculin and serological tests.

The passive haemagglutination, enzyme-linked immunosorbent assay and indirect fluorescent antibody tests were applied to study the non-specific reactions in experimentally infected guinea pigs and tuberculin positive bovines. These cross-reactions were greatly decreased after absorption of either sera with avian PPD or bovine PPD antigen with anti-avian PPD serum. The use of both absorbed sera and antigen raised the specificity of PHA and ELISA to 100%.