Biomedical subjects

Jovan Vukadinov

Publications and source records attributed to Jovan Vukadinov.

5 recordsLinked to original sources

PubMedDate not supplied

[Anthrax--the past, present and future].

HISTORY: Anthrax has been known since ancient times. Besides some references in the Old Testament, there is evidence of plagues in ancient Egypt, as well as descriptions of the disease by the Roman poet Virgil. ETIOLOGY: Anthrax is caused by Bacillus anthracis, unmovable, aerobic, gram-positive rods. It forms spores, which can survive for years in the environment. PATHOGENESIS: Capsular polypeptide and anthrax toxin are the principal virulence factors of Bacillus anthracis. Anthrax toxin consists of three proteins called protective antigen, edema factor, and lethal factor. It is thought that the inflammatory mediator--lethal factor is stored within the macrophage during the early stage of infection. It is rapidly released in large amounts into the blood stream and once the threshold for lysis is reached, it may be the cause of sudden death. EPIDEMIOLOGY: Grass-eating animals are usually infected by the bacilli from grass and ground. The disease is transmitted to people by contact with the sick animals or their products, such as wool, skin, meat etc. CLINICAL FEATURES: Two clinical forms exist: outer--cutaneous and inner, including inhalation and gastrointestinal anthrax. While cutaneous anthrax is easily cured, the inner forms have high mortality rates. DIAGNOSIS AND DIFFERENTIAL DIAGNOSIS: The diagnosis is easily established in cutaneous cases, characterized by black eschar. Severe intoxication and collapse during the course of bronchopneumonia or hemorrhagic enteritis should arise suspicion of anthrax. THERAPY: Hospitalization of patients is mandatory. Bacillus anthracis is susceptible to a number of antibiotics, including penicillin, erythromycin, tetracyclines, cephalosporins etc. PREVENTION: General veterinary prevention including vaccination of livestock and control of products is very important. The vaccine consists of anthrax bacillus that is attenuated. The endangered population, such as animal workers and military personnel should be vaccinated. Annual schedule of booster immunization must be maintained. ANTHRAX AS A BIOLOGICAL WEAPON: Anthrax has been developed as a weapon of mass destruction since World War I. During accidental release from a biological warfare factory in the former Soviet Union, 68 people died. The ease of laboratory production and its dissemination via aerosol led to its adoption by terrorists, as shown by recent happenings in the USA. CONCLUSION: A good knowledge of anthrax, its transmission and potentials as a biological weapon is essential for timely prevention and protection.

Anthrax↗

PubMedDate not supplied

[Lyme disease--new findings on its physiopathology, diagnosis, therapy and prevention].

INTRODUCTION: Lyme disease is a tick-borne disease caused by a spirochete Borrelia burgdorferi, which manifests as a multisystem disease of the skin, nervous system, heart and joints. Recently it is the most common vector-borne disease in Yugoslavia. NEW EPIDEMIOLOGICAL STUDIES: New epidemiological studies revealed that ticks can occasionally be infected not only by Borrelia burgdorferi, but also by some other microbes that can cause diseases in humans. Recently discovered the variable major protein-like sequence, antigenic variation of B. burgdorferi B 31 partly explains the ability of this organism to evade an active immune response. A key role in development of clinical symptoms associated with lyme disease belongs to the connection with ability of B. burgdorferi to induce and activate metallopeptidases and fibrinolytic enzymes, leading to extracellular matrix destruction. DIAGNOSIS AND TREATMENT: Diagnosis of Lyme borreliosis is made on the basis of clinical picture, exposure to ticks in endemic areas and serologic confirmation. It seems that polymerase chain reaction has little role in detection of B. burgdorferi in urine, blood, and spinal fluid samples, but it is most useful in evaluating the effectiveness of antibiotic therapy of Lyme arthritis. Infectious Diseases Society of America had prepared new guidelines for selective treatment of Lyme disease. Vaccination is still the best way of prevention for people living in high-risk areas.

Humans↗

PubMedDate not supplied

[Clinical importance of adenoviral infections].

INTRODUCTION: The aim of this article was to point to ubiquitous adenoviral infections and to give a literature overview. Adenoviral infections present with a variety of clinical manifestations, causing many differential diagnosis problems. DIAGNOSIS AND EPIDEMIOLOGY: In our country diagnosis is made using the complement fixation test (CFT), which detects antibodies due to soluble group specific antigen. In acute infections, we need two sera samples given in 2 weeks period with 4-fold rise or fall in titers. Due to many asymptomatic infections which can given increased titer by CFT, many physicians think that patients have a persistent infection. Persistent adenoviral infections need not be accompanied by any special clinical symptomatology. However, adenoviral infections still play an important role in acute respiratory infections. The most severe respiratory infection is pneumonia which can be associated with acute respiratory distress syndrome and death. Disseminated adenoviral diseases appear in 2.5% of all adenoviral infections with the same percentage between immunocompetent and immunocompromised persons. In immunocompromised persons adenoviral infections manifest as haemorrhagic cystitis, fulminant or acute hepatitis or meningoencephalitis. THERAPY AND CONCLUSION: We still don't have a special treatment for these kinds of infections. Variety of antiviral drugs with controversial effects have been reported in management of adenoviral infections in immunocompromised persons. In USA adenoviral vaccine has been excluded from vaccine schedules among military personnel, but morbidity and the first two deaths due to these infections in the last 30 years reported by MMWR in 2000, may change this policy.

Adenovirus Infections, Human↗

PubMedDate not supplied

[Neurocysticercosis--5 years' experience at the Clinic for Infectious Diseases].

INTRODUCTION: Neurocysticercosis (NCC) is the most common parasitic disease with wide distribution which is caused by larval forms of Taenia Solium. Our aim was to: show the most common clinical manifestations of patients with NCC and their importance in diagnosing this disease; examine the value of serologic diagnostic methods in blood and cerebrospinal fluid; to emphasize the value of radiological diagnostic methods--CT and MRI of the brain, in relation to the applied protocol of therapy, as well as the impact of anti-parasitic therapy on the outcome of this disease. MATERIAL, METHODS AND RESULTS: 13 patients with NCC (from 35 to 63 years of age, median age 49; 61.5% male and 38.5% female) were treated at the Clinic of Infectious Diseases in Novi Sad during a five-year period. Two patients had a positive epidemic data of parasitic diseases of the intestinal tract in childhood. The most common clinical manifestation was headache in 61.5% of patients, and generalized convulsions and hemiparesis in 46.2%. Meningeal inflammation was present in 27.3% of patients. Two of five patients had positive ELISA test for cysticercosis in the serum and cerebrospinal fluid. CT and MRI findings confirmed parenchimal form of NCC in 30.8% of patients, while calcifications were found in 69.2% of patients. All patients were treated with Albendazole, 800 mg a day, in two doses, 30.76% of patients had a favorable outcome of the disease, 53.7% of patients were discharged with complications, and one patient died. CONCLUSION: The most common manifestation of NCC in our patients was headache, followed by general convulsions and hemiparesis. Radiological diagnostic methods--CT and MRI--proved to be most valuable both in diagnostics and follow-up of lesions. All our patients were treated with Albendazole; Dexamethasone was applied in patients with severe inflammatory reaction, and anti-convulsive drugs in patients with convulsions.

Adult↗

PubMedDate not supplied

[Aging and infection].

EPIDEMIOLOGY: Aging is a natural process and a part of our lives, but nowadays there is an increase in the number of persons aged 65 and over. Today infectious diseases are still responsible for one-third of all deaths in the world. The elderly population is most vulnerable to serious infections and at greatest risk for death and complications. Among geriatric population pneumonia and influenza are the fourth most common cause of death. VACCINATION: One of the goals of preventive medicine is to reduce the rate of complications and mortality from infectious diseases by increasing immunization rates. Influenza and pneumococcal vaccines are indicated for persons aged 65 and over. Despite well-recognized benefit of such vaccination, less than 50% of eligible patients receive the vaccine each year. INFECTIONS: Older persons generally have increased susceptibility to infections because of multiple risk factors and they are the most vulnerable population to nosocomial and health-care associated infections. Older persons may manifest infectious diseases atypically, with acute confusion or delirium which can lead into delay in diagnosis and therapy. It is important to know that the older present with delayed or poor response to antimicrobial therapy and high rates of adverse reactions to drugs, including antibiotics. CONCLUSION: As elderly population is rapidly growing, majority of patients with serious or life-threatening infections are old. Geriatric issues have not typically been a focus of training in infectious diseases, but we must become aware of and knowledgeable about special and unique aspects of infections in this population.

Aged↗