Legionella pneumophila antibodies in serum samples from medical and dental personnel: a seroepidemiological survey

Figures & data

Figure 1. Distribution of tested subjects from both groups as per Ab index.

Table 1. Seroprevalence of L. pneumophila Sg 1-6 in the personnel and the control group.

	Personnel group (n = 66)		Control group (n = 90)
Parameters	Samples (N)/positive n (% ± Sp)	p	Samples (N)/positive n (% ± Sp)	p
Sex
Male	12/5 (41.67 ± 14.23%)	>0.05	44/2 (4.55 ± 3.14%)	>0.05
Female	54/22 (40.74 ± 6.69%)		46/5 (10.87 ± 4.59%)
Chronic conditions
Yes	7/4 (57.14 ± 18.70%)	>0.05	2/0	-
No	59/23 (38.98 ± 6.35%)		88/7 (7.95 ± 2.88%)
Medication influencing the immune response
Yes	2/1 (50 ± 7.07%)	>0.05	0/0	-
No	64/26 (40.63 ± 6.14%)		90/7 (7.78 ± 2.82%)
Smoking
Yes	22/7 (31.82 ± 9.93%)	>0.05	37/4 (10.81 ± 5.10%)	>0.05
No	44/20 (45.45 ± 7.51%)		53/3 (5.66 ± 3.17%)
Pneumonia in the past
Yes	14/7 (50 ± 13.36%)	>0.05	2/0	-
No	52/20 (38.46 ± 6.75%)		88/7 (7.95 ± 2.88)

Figure 2. Distribution of personnel Ab index > 5 depending on the professional position.

Table 2. Odds ratio (OR) and 95% confidence interval (CI) for association between L. pneumophila Sg 1-6 seropositivity and relevant factors.

Factor	OR	95% CI
Age (p = 0.019)
Under 49 years vs. over 50 years	9.77	1.44–60.97
Protective equipment (p = 0.003)
Single piece of protective equipment vs. all pieces of protective equipment (mask, gloves, goggles, etc.)	63. 868	4.04–1007.81
Mask and goggles vs. all pieces of protective equipment (mask, gloves, goggles, etc.)	3.796	0.48–29.82
Workplace (p = 0.044)
Surgical complex vs. dental medicine department	3.571	0.25–49.420
Individual dental practices vs. dental medicine department	21.136	0.98–452.88