title: [Artificial intranasal bacterial invasion in the newborn calf. 1. Quantitative assessment of nasal secretion for certain groups of bacteria].
abstract: A technique has been developed for quantitative assessment of nasal secretion for the presence of specified groups of bacteria, as a contribution to microbiological treatment of the problem of artificial intranasal bacterial invasion in newborn and nursed calf. Some 10(6) to 10(7) bacteria were recorded from each gram of nasal secretion in calves exposed to natural bacterial invasion. Micrococci and green diplococci were very rare, with only 10(3) to 10(4) or hardly up to 10(5) bacteria per gram of nasal secretion. Streptococci were irregularly found in smaller counts. Bacteria of the coli group went up steeply on the second or not later than the third day of age, and the rise continued to the ninth day. Coliform germs accounted for high or even the highest percentage in total invasion during that period of time.
mesh_terms: D000818:Animals; D000831:Animals, Newborn / Q000382:microbiology*; D001431:Bacteriological Techniques; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology* / Q000635:transmission; D004926:Escherichia coli / Q000302:isolation & purification; D008837:Micrococcus / Q000302:isolation & purification; D009297:Nasal Mucosa / Q000378:metabolism / Q000382:microbiology; D012220:Rhinitis / Q000382:microbiology / Q000635:transmission / Q000662:veterinary*; D013291:Streptococcus / Q000302:isolation & purification
vernacular_title: Untersuchungen zue künstlichen intranasalen Keimbesiedlung beim neugeborenen Kalb. 1. Quantitative Erfassung einzelner Keimgruppen im Nasenschleim