Actinomyces spp

As noted earher (Sect. 12.1.3), the reduced enamel epithelium is replaced with adherent salivary proteins, mostly amylase and acidic proline-rich proteins. The acidic PRPs are at about a three times greater concentration than in secreted saliva. The acidic domain of these proteins especially has a high affinity for hydroxyapatite. Once bound to pelhcle, the N-terminus of acidic-PRPs forms an attachment site for the major classes of commensal bacteria (viridans streptococci and Actinomyces spp.) that occupy the mucosal surfaces and saliva of a healthy oral cavity. Some streptococci grow by themselves in dental biofilms, but many others grow better if certain Actinomyces spp. are also present. 

Yeung, M. K., 1993, Complete nucleotide sequence of the Actinomyces viscosus T14V sialidase gene Presence of a conserved repeating sequencing among strain of Actinomyces spp., Infect. Immun. 61 109-116. 

Plant growth regulator produced by Actinomyces spp. Constit. of the leaves of Allophylus cobbe. Plates or leaflets. Mp 157-158°. 

Brucella abortus Pseudomonas aeruginosa Mycobacterium tuberculosis Actinomyces spp. 

Dog and cat Pasteurella multocida, staphylococci, streptococci Moraxella spp., Eikenella corrodens, Capnocytophaga canimorsus, Actinomyces, Fusobacterium, Prevotella, and Porphyromonas spp. 

Virtually all bacterial species and genera express lectins or lectin-like activities, frequently of more than one type and with different specificities. However, it is usually not known whether individual cells coexpress multiple types of lectin or each lectin is confined to a distinct cell population. Many Gram negative bacteria (for example, Escherichia coli and Salmonellae spp.) and a few Gram positive ones (e.g. certain actinomyces), produce surface lectins that are often in the form of submicroscopic hairlike appendages known as fimbriae (pili) that protrude from the surface of the cells. The best characterized bacterial surface lectins with respect to their molecular properties, carbohydrate specificity and genetics are the type 1 fimbriae specific for mannose and the type P fimbriae specific for galabiose, [Gal(al-4)Gal], produced by many strains of E. coli. Other examples are S fimbriae of E. coli, specific for NeuAc(a2-3)Gal, and type 2... 

Streptococcus species, Enterococci, Listeria, Neisseria meningitidis, many anaerobes (not Bacteroides fragilis), spirochetes, Actinomyces, Erysipelothrix spp., Pasteurella multocida ... 

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