Any mechanism of immune avoidance that directly affects the host immune system, e.g. blocking any stage in host MHC class I and II presentation. The host is defined as the larger of the organisms involved in a symbiotic interaction.

The increase in size or mass of an organism, occurring within the cells or tissues of the host organism. This may (but not necessarily) include a filamentous growth form, and also can include secretion of proteases and lipases to break down host tissue. The host is defined as the larger of the organisms involved in a symbiotic interaction.

The increase in size or mass of an organism occurring when the organism is in a symbiotic interaction.

The process in which proteins are transferred into the extracellular milieu or directly into host cells, via the type VII protein secretion system.

Any process in which an organism modulates the frequency, rate or extent of the host signal transduction pathways, the cascade of processes by which a signal interacts with a receptor. The host is defined as the larger of the organisms involved in a symbiotic interaction.

Any process in which an organism stops, prevents, or reduces the frequency, rate or extent of the cell mediated immune response of the host organism. The host is defined as the larger of the organisms involved in a symbiotic interaction.

The rigid or semi-rigid envelope lying outside the cell membrane of plant, fungal, most prokaryotic cells and some protozoan parasites, maintaining their shape and protecting them from osmotic lysis. In plants it is made of cellulose and, often, lignin; in fungi it is composed largely of polysaccharides; in bacteria it is composed of peptidoglycan; in protozoan parasites such as Giardia species, it's made of carbohydrates and proteins.