Actinomyces

Very often the actinomyces are mixed with some other microorganism, the growth of which is more vigorous, and tends to obscure the actinomyces.

Source: wiktionary

He soon became expert enough to spot an actinomyces colony at a glance. For Albert Schatz, the quest for the wonder microbe in this chaos of nature owed more to intuition than any systematic scientific search. "If you ask me why I picked one colony of actinomyces over another, I cannot tell you. There was no rationale for picking one colony of an actinomyces over another. Naturally if a plate had five colonies which morphologically and grossly looked alike, I would not pick all five."

Source: wiktionary

An sspAB double mutant was generated and the resulting effects were additive; however, it retained a single previously unrecognized lactose-inhibitable coaggregation with an actinomyces coaggregation group D representative (Figure 3.3, cognate symbol complementary to gray rectangle).

Source: wiktionary

Waksman wrote in his autobiography: " … It is the first attempt that has ever been made to grow an actinomyces on a large scale, to attempt to utilize an actinomyces for any practical purpose, or even to find any use whatsoever for this obscure group of micro-organisms." Unfortunately, the initial excitement did not last long: actinomycin certainly killed the pathogens, but it killed laboratory animals too. Woodruff pressed on …

Source: wiktionary