Table I. Inhibition of type 1 fimbriae production by PapB.

Strain	Plasmid	HA phenotypea		HA titreb	EMc % piliated bacteria
						–mannose	+mannose
HB101		–	–	nd	0
HB101	pSH2	+++	–	1/128	77
HB101	pSH2 + pBR322	++	–	1/128	78
HB101	pSH2 + pHMG80	–	–	1/16	2
HB101	pSH2 + pHMG95	++	–	1/128	82

^aThe haemagglutination (HA) test was performed with human erythrocytes as described in Materials and methods.

^bThe HA titre was determined as the highest dilution of the bacterial culture with which the haemagglutination with guinea pig erythrocytes could still be clearly observed (nd, not determined).

^cThe EM test was performed as described in Materials and methods.