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. 2011 Dec;77(24):8494–8499. doi: 10.1128/AEM.05830-11

Fig. 1.

Fig. 1.

Regression analysis of relative humidity prior to immersion in spirochete suspensions and percentage of O. hermsi ticks positive for B. hermsii infection by IFA. The relative humidities (RH %) for five saturated salt solutions are shown along with the percentages of ticks showing detectable spirochete infection after exposure to these conditions and immersion in suspensions of B. hermsii YOR (see Materials and Methods). A 76% RH corresponds to Mg(C2H3O2)2 (20% positive) and to KCl-NaCl (12.5% positive) salt solutions.