Lack of Evidence of Enterotoxin Involvement in Pathogenesis of Campylobacter Diarrhea (original) (raw)
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Investigating vomiting and/or bloody diarrhoea in Campylobacter jejuni infection
Journal of Medical Microbiology, 2006
Campylobacter jejuni infection frequently presents as acute enteritis with diarrhoea, malaise, fever and abdominal pain. Vomiting and bloody diarrhoea are reported less frequently. To investigate potential host, micro-organism or environmental factors that might explain the different clinical presentations, the features of laboratory-confirmed Campylobacter jejuni cases presenting with vomiting and/or bloody diarrhoea were compared with cases who did not report either clinical manifestation. Single variable analysis and logistic regression were employed. Explanatory variables included food, water and environmental risks. Cases who reported vomiting and/or bloody diarrhoea tended to suffer a longer illness and were more likely to require hospital admission. Independent risks identified were being a child, female gender, consumption of poultry other than chicken, pre-packed sandwiches and sausages, and reported engineering work or problems with drinking-water supply. A dose-response relationship with vomiting and/or bloody diarrhoea and increasing daily consumption of unboiled tap water was observed also. Vomiting and/or bloody diarrhoea characterized the more severe end of the disease spectrum and might relate to host susceptibility and/or infective dose. The role of unboiled tap water as a potential source of C. jejuni infection in England and Wales requires further investigation.
Journal of clinical …, 2008
From 300 stool samples, 58 Campylobacter strains were isolated by standard microbiological and biochemical methods. Of these, 40 strains were identified as Campylobacter jejuni and 5 as Campylobacter coli. The presence of flaA (100%), cadF (100%), racR (100%), dnaJ (100%), pldA (100%), ciaB (95%), virB11 (0%), ceuE (82.5%), cdtA (97.5%), cdtB (97.5%), cdtC (97.5%), and wlaN (7.5%) genes was detected in C. jejuni by PCR. All C. jejuni strains but one produced cytolethal distending toxin in a HeLa cell assay.
Avicenna Journal of Clinical Microbiology and Infection, 2015
Background: Enteritis caused by Campylobacter is considered as the most common acute bacterial diarrhea around the world. In most cases, infection occurs as a result of consuming contaminated water or food, especially raw meat of fowls. Objectives: The purpose of the present study was to determine the prevalence and antibiotic resistance of campylobacter species among pediatrics of Hamadan city, Iran. Patients and Methods: A total of 120 stool samples from children less than 10 years old were examined from January 2013 to December 2014 in Hamadan, Iran. The samples were incubated in Campy-Thio enrichment medium for 1-2 hours and then cultured on a specific medium; after that, the suspected colonies were analyzed for Campylobacter spp. identification by conventional tests. The identified species by biochemical methods were confirmed by polymerase chain reaction (PCR). Antimicrobial susceptibility testing was performed by disk agar diffusion (DAD) method. Results: Twelve (10%) Campylobacter spp. from 120 stool samples were isolated including C. coli and C. jejuni. In the antibiotic susceptibility test, the most frequent resistance was observed to ciprofloxacin 8 (88.8%), followed by 7 (77.7%) resistant strains to tetracycline, 7 (77.7%) to erythromycin, 6 (66.6%) to clindamycin, 5 (55.5%) to meropenem, 4 (44.4%) to gentamicin, 3 (33.3%) to nalidixicacid and only 1 (11.1%) to chloramphenicol. Conclusions: Campylobacter is responsible for some important clinical problems such as enteritis and is also associated with meningitis and hemolytic-uremic syndrome. It is imperative to monitor the prevalence and antibiotic resistance of Campylobacter spp. as well as other the zoonotic bacteria.
FEMS Microbiology Letters, 1990
Campylobacler jejum and C colt strums were collected during three different years from adult patients with enterocohtis m Sweden (n = 372) from 49 pauents in Kuwmt. and Campylobacter strains from hens from Meraco, Pakistan and Sweden (n = 107) and Swedish pigs (n = 47). C jejum was the predormnant spe~es m human and hen isolates, and C colt m pigs C, colt was slgmficantly more common m human isolates from Sweden, and more common m hen isolates from Pakistan, than m hens from Sweden and Mexico C lartdAs was only tsolated from ptgs (17,%) and was in no ease enterotoxlgenlc. Both m human and hen isolates, C, jejan# strains were more enterotoxigeme than C coh strains C jejuni stratus from Swedish hens were less enterotoxigenlc than those from pakistan and Mextco (P < 0.001), and stratus from pigs were less enterotoxtgemc than those from hens (P < 0.001) We conclude that C jejum are more often enterotoxigemc and pnsmbly more vtrulent than c
Toxin production by Campylobacter spp
Clinical microbiology reviews, 1997
Of all the virulence factors that were proposed for Campylobacter jejuni and related species to cause disease in humans, the discovery of toxin production was the most promising but led to a rather confusing and even disappointing stream of data. The discussion of whether proteinaceous exotoxins are relevant in disease remains open. One important reason for this lack of consensus is the anecdotal nature of the literature reports. To provide a basis for an unbiased opinion, this review compiles all described exotoxins, compares their reported properties, and provides a summary of animal model studies and clinical data. The toxins are divided into enterotoxins and cytotoxins and are sorted according to their biochemical properties. Since many Campylobacter toxins have been compared with toxins of other species, some key examples of the latter are also discussed. Future directions of toxin research that appear promising are defined.
Clinical and Laboratory Characteristics of Pediatric Campylobacter spp. Acute Gastroenteritis
Archives of Pediatric Infectious Diseases, 2016
Background: Although Campylobacter strains are one cause of acute bacterial gastroenteritis, their clinical and laboratory findings have only been examined in a few studies. Objectives: This study was performed to evaluate the frequency level as well as the clinical and laboratory findings of patients with acute gastroenteritis caused by Campylobacter. Patients and Methods: In this cross-sectional study, 419 Iranian children in Semnan city with acute gastroenteritis were assessed for their clinical and laboratory findings, including fever, abdominal pain, vomiting, dehydration, the presence of red blood cells and white blood cells (WBCs) in the stool, and leukocytosis. After being prepared for testing, a sample of the patient's stool was also examined for the presence of Campylobacter strains through microscopic examination, culture, and chemical reactions. Results: There were 36 positive cultures (8.6%) for Campylobacter, with frequencies of 6.4% and 10.3% for boys and girls, respectively (P = 0.16). The highest frequency of positive culture belonged to the age group over six years (P = 0.02). The most common findings associated with Campylobacter diarrhea included abdominal pain (77.8% vs.1 8.8%, P < 0.001), fever (80.6% vs. 20.4, P < 0.001), leukocytosis (72.2% vs. 45.7%, P = 0.002), and WBCs in the stool (63.9% vs. 23.8%, P < 0.001). Conclusions: This study showed that abdominal pain, fever, leukocytosis, and WBCs in the stool were associated with gastroenteritis infection caused by Campylobacter.