Abstract: The present invention provides compositions, kits, and methods for the detection of host cell proteins (HCPs) in biological samples. In some embodiments, the present invention utilizes immunization of aves hosts with proteins derived from non-aves host cells to produce aves antibodies specific for non-aves HCPs.

Abstract: Embodiments of the present disclosure are directed to systems and methods for collection and analysis of environmental air dust (EAD) within an individually ventilated cage rack (IVR) environment for detecting pathogens. The method includes collection of an EAD sample by a collection media, isolation of a plurality of nucleic acids (e.g., RNA and/or DNA) representative of one or more infectious agents from the EAD sample, optional reverse transcription of RNA to cDNA if the isolated nucleic acids contain RNA, amplification of the cDNA and/or DNA (e.g., by polymerase chain reaction (PCR)), and assay interpretation. Optionally, the EAD sample may be analyzed with one or more other sample types (e.g., fecal pellets, oral swabs, body swabs, tissue, etc.) to improve detection of low-copy organisms.