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Taylor Dunn edited untitled.tex
over 8 years ago
Commit id: bf80a2ce6814b9d7177a1b50905876dc0be46bae
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$\quad b_x \equiv $ fraction of bacteria that have invaded a host cell $ = \frac{B_x}{B_{\rm tot}}$
$r $\tilde{r} \equiv $ ratio of ruffles to host cells with ruffles $ = \frac{R}{H_r}$
$\tilde{b} \equiv $ ratio of attached bacteria to host cells with bacteria $ = \frac{B_a}{H_a}$
\begin{subsection}
To understand how these quantities evolve in time, we must define the rates which describe the various stochastic processes of bacterial invasion. A swimming bacterium can either attach to a host cell normally, or be recruited to a membrane ruffle.
$\Gamma_a \equiv $ primary attachment rate per bacterial density
$\Gamma_b \equiv $ secondary attachment by ruffle recruitment rate per bacterial density
Once attached, a bacterium can cause ruffling or invade the host cell.
$\Gamma_r \equiv $ ruffle formation rate per attached bacteria
$\Gamma_x \equiv $ invasion rate per attached bacteria
There is evidence that suggests a physical limit to the number of ruffles per cell, and the number of invaded bacteria per cell, so we define the following effective rates.
$\Gamma_r^{*} \equiv $ effective (limited) ruffle formation rate per attached bacteria $ = \Gamma_r (1 - \frac{\tilde{r}}{\tilde{r_{\rm max }}})$
$\Gamma_x \equiv $ invasion rate per attached bacteria