10^10 - 10^11 phage particles/g faeces
||Horse Equus caballus
||Letarov A, Kulikov E. The bacteriophages in human- and animal body-associated microbial communities. J Appl Microbiol. 2009 Jul107(1):1-13. doi: 10.1111/j.1365-2672.2009.04143.x. p.2 right column bottom paragraphPubMed ID19239553
||Cann, J.A., Fandrich, S.E. and Heaphy, S. (2005) Analysis of the virus population present in equine faeces indicates the presence of hundreds of uncharacterized virus genomes. Virus Genes 30, 151–156.PubMed ID15744573
||Primary source abstract: "Virus DNA was isolated from horse faeces and cloned in a sequence-independent fashion. 268 clones were sequenced and 178140 nucleotides of sequence obtained. Statistical analysis suggests the library contains 17560 distinct clones derived from up to 233 different virus genomes."
||P.2 right column botttom paragraph: "In horse faeces, judging by the yield of phage DNA from an extracted uncultured viral community (primary source), [investigators] can expect about 10^10–10^11 phage particles per gram of faeces. In ultra-thin sections of horse
faeces examined by TEM, [they] were unable to visualize this expected number of phage particles (their unpublished observation). In the work of Breitbart et al. (2003), a uncultured viral community was isolated from human faeces and VLP [virus-like particles] were visualized by fluorescent microscopy.
However, no quantitative estimation of VLP concentration was reported."