Shigellosis, also known as shigellosis, is an acute infectious disease caused by bacteria of the genus Shigella. The disease is transmitted by the feco-oral route and manifests itself as acute gastrointestinal disorders, including diarrhea, often with blood and mucus, abdominal pain, fever and general weakness. The main source of infection are infected people who excrete the pathogen in their feces. Shigellosis is considered an important public health problem, especially in countries with poor sanitation and hygiene. The disease can lead to severe complications, especially in vulnerable groups of the population, and requires a careful approach to diagnosis and treatment.
History of the disease and interesting historical facts
Shigellosis has been known to mankind for over a century. The first cases of the disease were described in the late 19th century, when researchers began to isolate shigella bacteria from the stool of patients. In 1896, Swedish bacteriologist Ernst Shige isolated Shigella dysenteriae and described its pathogenic properties. Interestingly, during the First and Second World Wars, cases of shigellosis increased significantly due to poor sanitation. The most devastating epidemics were observed among military personnel and soldiers, which led to significant losses. In the following decades, research in the field of microbiology allowed us to better understand the mechanism of action of shigella and develop diagnostic and treatment methods.
Epidemiology
Shigellosis remains a major public health problem, especially in developing countries. According to the World Health Organization, about 165 million cases of shigellosis are reported each year, with more than 1.1 million deaths from complications, especially among young children. The incidence of the disease varies by region, standard of living, and the development of the health care system. Epidemiological studies show that the highest incidence rates are recorded in regions with poor hygiene and access to clean water, such as areas of South Asia and Africa.
Genetic predisposition to this disease
Although shigellosis generally does not have a strong genetic predisposition, some studies suggest that certain genes may influence susceptibility to infection. For example, there is interest in genes involved in the immune response, such as IL-10 and TNF-α, which may affect the body’s inflammatory response. Research suggests that genetic variations in these genes may determine the severity of the disease and the time it takes to recover from infection.
Risk factors for the development of this disease
There are several risk factors that contribute to the development of shigellosis:
- Lack of access to clean water and inadequate sanitation.
- Consuming contaminated food or water.
- Poor hygiene, including inadequate hand washing after using the toilet.
- Travel to regions with high incidence of shigellosis.
- Problems with the immune system, including HIV infection or other immunodeficiency conditions.
These factors contribute to the spread of infection and its occurrence in susceptible passengers.
Diagnosis of this disease
Diagnosis of shigellosis is based on clinical symptoms and laboratory tests:
- The main symptoms include: diarrhea (sometimes with blood), abdominal pain, fever, general malaise.
- Laboratory tests: stool analysis to detect shigella, corresponding cultures on nutrient media.
- Radiological examinations are not required, but in certain cases CT scans may be considered to diagnose complications.
- Other diagnostic tests may include serologic tests for antibodies.
- Differential diagnosis includes exclusion of other infectious diseases such as salmonellosis and campylobacteriosis.
Treatment
Treatment of shigellosis usually includes immediate hospitalization in severe cases, supportive care, and pharmacological treatment:
- General treatment focuses on hydration and restoration of electrolyte balance.
- Pharmacological treatment may include antibiotics such as ciprofloxacin and azithromycin, but the choice of drug depends on the antibiotic resistance in a particular region.
- Surgical treatment is prescribed only in severe cases when complications such as intestinal perforation develop.
- Other treatments may include probiotics to restore normal microflora.
List of medications used to treat this disease
The main drugs used to treat shigellosis are:
- Ciprofloxacin
- Azithromycin
- Clobigen (Cloxacillin)
- Roxithromycin
- Ofloxacin
Each of these drugs has a proven track record in the treatment of shigellosis, but they may differ in spectrum of action and effectiveness depending on the strain.
Disease monitoring
Disease monitoring includes regular follow-up examinations and prognosis assessment:
- Follow-up steps include monitoring for symptoms and repeating stool tests to check for the presence of Shigella.
- The prognosis for a superficial disease is generally good, but in cases of perforation or sepsis, serious complications may arise.
- Complications include severe dehydration, toxic megacolon, and sepsis, especially in immunocompromised individuals.
Age-related features of the disease
Shigellosis can progress differently depending on the age group:
- In young children, shigellosis often occurs in a more severe form, which is associated with the body's high susceptibility to infections.
- Adults usually have a milder illness, but the elderly and people with weakened immune systems are at risk.
- In elderly patients, the disease may be accompanied by more severe complications and requires close medical supervision.
Questions and Answers
- What are the main symptoms of shigellosis? The main symptoms include diarrhea, abdominal pain, fever and general malaise.
- How is shigellosis diagnosed? Diagnosis is made by examining stool samples for the presence of bacteria and assessing the clinical symptoms of the disease.
- What are the treatments for shigellosis? Treatment includes hydration support, antibiotics, and in some cases surgery.
- Can shigellosis be prevented? Prevention includes good hygiene, drinking clean water, and good sanitation practices.
- What are the main risks of contracting shigellosis? The main risks are related to poor sanitation, travel to endemic areas and inadequate hygiene.
Shigellosis remains a pressing problem in the field of infectious diseases, and timely diagnosis and treatment are key factors in reducing morbidity and mortality from this disease.
