[Campylobacter jejuni infections in slaughterhouse workers]

Area of Science:

• Microbiology
• Immunology
• Occupational Health

Background:

• Slaughterhouse workers face occupational exposure to various pathogens.
• Campylobacter jejuni is a significant cause of bacterial gastroenteritis.
• Serological studies are crucial for assessing exposure and immune response in at-risk populations.

Purpose of the Study:

• To investigate the prevalence of complement fixing (C.F.) antibodies to Campylobacter jejuni in slaughterhouse workers.
• To compare antibody titers in workers with a control group of blood donors.
• To identify risk factors associated with seropositivity and explore potential health implications.

Main Methods:

• Detection of C.F. antibodies using Mosimann's method.
• Testing against five antigens: Campylobacter jejuni, Yersinia enterocolitica (types 03 and 09), Yersinia pseudotuberculosis, and Brucella.
• Statistical analysis to compare seropositivity rates between workers and controls and assess associations with exposure and employment duration.

Main Results:

• 12.1% of slaughterhouse workers tested positive for C.F. antibodies to C. jejuni, compared to 2.4% in controls (p < 0.01).
• Antibody titers ranged from 1:10 to 1:40.
• Frequent and close contact with animals or their products was significantly associated with seropositivity; employment duration was not.

Conclusions:

• Slaughterhouse workers exhibit elevated C.F. antibody titers to C. jejuni, confirming occupational exposure.
• Sixty percent of seropositive workers reported rheumatological symptoms, suggesting a potential link.
• Intervention strategies focusing on breaking the chain of C. jejuni transmission are recommended for control.