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Campylobacter

Campylobacter is a genus of Gram-negative bacteria. more...

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Medicines

Infection

Infection with a Campylobacter species is one of the most common causes of human bacterial gastroenteritis. In the United States, 15 out of every 100,000 people are diagnosed with campylobacteriosis every year, and with many cases going unreported, up to 0.5% of the general population may unknowingly harbor Campylobacter in their gut annually. Diarrhea, cramps, abdominal pain, and fever develop within 2–5 days of picking up a pathogenic Campylobacter species, and in most people, the illness lasts for 7–10 days. But the infection can sometimes be fatal, and some individuals develop Guillain-Barré syndrome, in which the nerves that join the spinal cord and brain to the rest of the body are damaged, sometimes permanently.

Campylobacteriosis is usually caused by C. jejuni, a spiral-shaped bacterium normally found in cattle, swine, and birds, where it causes no problems. But the illness can also be caused by C. coli (also found in cattle, swine, and birds), C. upsaliensis (found in cats and dogs), and C. lari (present in seabirds in particular). Disease-causing bacteria generally get into people via contaminated food, often undercooked or poorly handled poultry, although contact with contaminated water, livestock, or household pets can also cause disease.

Treatment

Infections of poultry was treated by enrofloxacin and sarafloxacin, many times by mass administration to flocks for single instances of infection. According to the FDA study banning this practice, this generally did not eliminate all campy bacteria, and promoted populations of bacteria resitant to fluoroquinolone drugs (like the human drug ciprofloxacin).

Species

  • Campylobacter coli
  • Campylobacter jejuni
  • Campylobacter lari
  • Campylobacter insulaenigrae
  • Campylobacter upsaliensis
  • Campylobacter helveticus
  • Campylobacter fetus
  • Campylobacter hyointestinalis
  • Campylobacter lanienae
  • Campylobacter mucosalis
  • Campylobacter curvus
  • Campylobacter concisus
  • Campylobacter rectus
  • Campylobacter showae
  • Campylobacter gracilis
  • Campylobacter hominis
  • Campylobacter sputorum

Other resources

Read more at Wikipedia.org


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Quelling Campylobacter: it takes a planet
From Agricultural Research, 10/1/04 by James A. Lindsay

Campylobacter.

It's a funny sounding name for bacteria. But there's nothing funny about a Campylobacter infection.

Symptoms include blood in the stool, fever, and abdominal pain, which may be mistaken for appendicitis or ulcerative Crohn's disease.

Though infection usually lasts only a few days, that may be long enough to cause meningitis in newborns or temporary arthritis in children.

Older individuals are also among the most vulnerable to infection, especially if they have a chronic illness or weak immune system. In some cases, the bacteria may get into their bloodstream and affect a variety of organs or tissues, causing an unusual form of arthritis or a nervous system disease called Guillain-Barre syndrome.

Campylobacters are found everywhere in nature, even in house pets, who may carry the bacteria without harm to themselves. Campylobacter can also be found in farm animals, especially poultry. (See article on page 4.)

Illness from Campylobacter is a serious human health problem worldwide. It is also a critical problem for U.S. Department of Agriculture agencies concerned with food safety, animal health, and international trade.

Consequently, this microbe is a key target of the USDA Agricultural Research Service's Food Safety Program. ARS experts at several laboratories from coast to coast are studying various aspects of the bacteria. Their work is uncovering answers to many key questions about this pathogen, such as: Where does it live? How does it survive and grow in animals and in foods? What genes and what proteins (the products of those genes) enable it to succeed as a pathogen? Why are some Campylobacters more pathogenic than others?

Until recently, we thought there were only a few species of Campylobacter that were important to investigate, monitor, and control. It now appears we might have been wrong. Scientists and public health officials worldwide are discovering that there are other, little-known species that warrant our close attention. Even though these species have only recently attracted our attention, we do not--at this time--think they are of recent origin.

So far, no laboratory has yet developed a best method or "gold standard" to isolate and identify Campylobacters. A reliable, rapid, affordable procedure would help coordinate the efforts of scientists everywhere.

Also missing is a multiple-species, single-pass test that would provide a fast, inexpensive way to identify all species of Campylobacter in a given sample from a patient, for example. Such a test would greatly help public health agencies responsible for monitoring Campylobacter infections in humans and for tracking the infections to their source, whether it is a farm or a food-processing plant.

To address and correct the limitations of today's methods for isolating and identifying the array of Campylobacters, ARS scientists are working with researchers here and abroad to develop a gold-standard test. Such technology is a goal of Campycheck, a novel collaboration of several European nations, South Africa, and the United States. We are also collaborating with the national public health agencies of Canada and Iceland to speed the process of discovery about this microbe.

There's more. We are determining the prevalence of Campylobacter species and strains in food and water. In corporate efforts with the Institute for Genomics Research and with Agencourt Bioscience Corporation, we are determining the structure of all the genes in certain Campylobacters. We are preparing these findings for publication; some genomic details are already posted on the World Wide Web for use by researchers everywhere.

Our collaborations are timely and appropriate. Food safety is, unavoidably, a global issue. Food produced today in another country can be on your table tomorrow. ARS research on Campylobacters is an example of the agency's efforts to make America's already safe food even safer. At the same time, our discoveries are helping people in other countries, just as the discoveries at labs beyond our borders are helping us. To quell Campylobacter does, indeed, take a planet.

James A. Lindsay

ARS National Program Leader

Food Safety

Beltsville, Maryland

COPYRIGHT 2004 U.S. Government Printing Office
COPYRIGHT 2004 Gale Group

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