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neisseria meningitidis under the microscope
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Neisseria meningitides causes systemic infections like meningococcal meningitis and meningococcal septicaemia which are bacterial infections. Neisseria meningitides is only found in humans. Neisseria meningitidis is present with the normal flora of the mouth in the back of the throat or nose and will seldom cause disease. It is hard to explain why some individuals carry the bacteria without them getting affected while others contract meningococcal disease. About 10% of the general population will be affected by Neisseria meningitidis, with the utmost carriage (roughly 25%) in 15-19 year olds. It is transmitted from individual to individual by inhaling respiratory secretions from the mouth and throat or by direct contact. Close long standing contact is usually needed to transmit the bacteria. They can’t survive for long outside the body (HPA 2011).
Premature signs and symptoms of meningococcal disease may be vague and thus hard to differentiate from influenza or other diseases. Premature symptoms comprise of fever, vomiting, malaise and lethargy (HPA 2011). The normal incubation period is four days, but can vary between 2-10 days (WHO 2011).
Sub-Saharan Africa is the region where maximum cases are usually found, it is called the meningitis belt, the belt is starts from Senegal which is in the west of the country to Ethiopia which lies in the east. Group A meningococcus shares an estimated 80-85% of all the cases in this belt, with epidemics taking place every 7-14 years. During the epidemic season of 2009, 14 African countries using enhanced surveillance reported 88199 suspected cases, which included 5352 deaths, a record number since the 1996 epidemic (WHO 2011).
In the UK, meningococcal meningitis is rare, but per...
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The presented case is of a patient named R.S. who has a smoking history of many years, which can be directly tied to his development of chronic bronchitis, a chronic obstructive pulmonary disease (COPD) specified as Type B. It is estimated that in 90% of chronic bronchitis or “blue bloaters”, cigarette smoking is the major cause. Chronic bronchitis involves persistent and irreversible airway obstruction, due to the constant inflammation of the bronchial mucosa, leading to hypertrophy and hyperplasia of bronchial glands. The latter exposes the individual to higher risks of bacterial infections; often colonization of organisms such as Streptococcus or Staphyloccocus pneumoniae can be exhibited. This is due to the lost or impaired function of mucociliary clearance action which results from the replacement of certain sections of ciliated columnar epithelium by squamous cells in the bronchi. (Copstead &Banasik, 546-547)
There are five types of meningitis, each diagnosis classified according to their cause: viral, bacterial, fungal, parasitic, and non-infectious (developed as a result of HIV/AIDS, cancer, tuberculosis, and other diseases and conditions). The distinct symptoms that all five types of meningitis share are the symptoms originating from the inflamed meninges, which, as reported by the Mayo Clinic (2015), include headaches, fever, and stiffness of the neck as the most distinct few of the variety. As stated by the Centers for Disease Control and Prevention (2015), although meningitis is considered a relatively rare disease in the United States (with the usually nonfatal viral meningitis being the most commonly observed case), bacterial meningitis in particular is the epidemic type that is often times fatal and the most dangerous. It is contagious and it can be spread by respiratory fluids such as saliva and mucus (CDC, 2015). In some cases, it is possible for those who have recovered from this form of meningitis to suffer from acute complications that impact their
Due to its tendency to be both a viral and bacterial disease, meningitis can prove difficult to treat. Its dual tendencies also mean that various methods are used to attack the disease. In order to treat meningitis, different aspects of the disease must be discovered first. The type of organism causing the infection, the age of the patient, and the extent of the infection must all be taken into account (WebMD, sec. 8). Any time meningitis is found, immediate treatment with antibiotics is required, and continuation of antibiotic treatment depends on whether a bacteria or a virus is causing th...
In order to infect the meninges, pathogens must cross the blood brain barrier. According to Myers, Director of Infection Control at Scripps Mercy hospital (2000), pathogens enter through an open wound, surgical incision, or a mucus membrane. Systemic infections can also result in meningitis (Huether & McCance, 2012) with typical invasion occurring through the middle ear or during respiratory tract infections (Myers, 2000). Bacteria elude the body’s immune defenses with their capsule; viruses hide within the body’s own cells and invade the cerebrospinal fluid through the cerebral capillary system (Myers, 2000).
The symptoms of bacterial meningitis can appear rapidly over several days. Normally they develop within 3-7 days after exposure to the bacteria. Signs and symptoms of bacterial meningitis can occur suddenly and they include: headac...
The first recorded major outbreak of meningitis occurred in 1805, even though many scientists suggest that Hippocrates was the first to discover the existence of meningitis and there is evidence that suggests that the disease was also studied by pre-Renaissance physicians. Sir Rober Whytt is attributed with the description of tuberculosis meningitis in a report in 1768. Meningitis outbreaks were subsequently described in Europe, America and Africa by 1840. The epidemic became very common in Africa, starting with a major epidemic in Nigeria and Ghana in 1905. Today, Sub-Saharan Africa is known as the meningitis belt because it has been heavily plagued by large epidemics of the disease throughout the century.
Meningitis infection is the inflammation of the membrane that covers the brain and spinal cord. Neisseria Meningitidis can cause severe infectious bacterial meningitis in children and immune-compromised patients. Humans are the only reservoir of N. meningitidis, and it can easily spread through kissing, sneezing, coughing, direct contact or living in the same house. The symptoms may include fever, chills, stiff neck, and severe headache.
Meningococcal disease is prevalent on college campuses within the resident halls; so much so that many colleges require those students that live on campus get a vaccine against it. Specifically I will look at bacterial meningitis cause by the agent Neisseria meningitidis. N. Meningitidis is found to also have humans as a reservoir. The portal of exit for the bacteria also happens to be respiratory droplets, discharge from the nose and throat. In the lab we receive many emergency room cerebral spinal fluid (CSF) samples because the patient presents with a stiff neck, and severe headache. Other common symptoms include sudden high fever, vomiting or nausea (combined with the headache), seizures, sleepiness or difficulty waking up, sensitivity to light, and confusion. The preferred method of diagnosis is recovery of the bacteria from a sterile site explicitly CSF or blood. Isolation in the CSF or blood requires a culture and usually during the cell count the bacteria can be seen among the cells, just not identified. A common course of action in the ER is to give the patient antibiotics once meningitis is suspected decreasing the chance that bacteria will be seen in the cell count or on culture. If the culture result is negative but meningitis is still suspected identification of group specific meningococcal polysaccharides in the CSF by latex agglutination is another method, however false negatives are common through this method. Polymerase chain reaction (PCR) doesn’t require any live organisms for diagnosis and it will detect the meningococcal DNA in the CSP or the plasma. Finally, the microscopic inspection of gram stained specimen could show N. Meningitidis. Breaking the chain of infection for meningitis is similar to mononucleosis and requires swift identification of the agent, and good hand hygiene. A good break in the chain for this specific agent is the vaccine offered to children and
Streptococcus pneumoniae is found worldwide. The common host is the human body, in which it often does not cause disease but at other times it can cause diseses in particular, pneumonia. It also causes otitis media, bacteremia, meningitis, peritonitis, and sinusitis. The route by which this organism is spread is from human to human in the form of aerosol droplets. When inside the host the organism’s primary site of pneumococcal colonization is the nasopharynx. From this site it can aspire to the lungs, eventually spread to the blood and traverse the blood-brain barrier to the meninges, once inside the blood it can cause infections throughout the body. Symptoms of the disease include sudden chill, fever, cough, pleuritic pain, or sputum with a red/brown rusty color.
The following case study is about a lab technician who got in contact with a patients spinal fluids and began felling different symptoms like chills, fever, nausea, even had purple-red lesions on his or her neck and extremities, also throat culture grew gram-negative diplococci. From reading the case study again, I realized that the lab technician had purple-red lesions and also had something to do with spinal fluids which strongly prompt me to lead towards Meningococcemia infection. Meningococcemia infection is a serious disease that can effect the whole body but particularly the limbs and brain. Most patients with Meningococcemia may present Meningitis alone, these symptoms may include headache, sore throat, nausea and purpuric lesions all over the body. Meningitis is a disease that is the immflamuation of
The bacteria and viruses that cause meningitis have a pretty specific method by which they attack the human body. They have to find a way into the meninges, or the protective layers between the brain and the skull. They include the pia mater, the arachnoid, and the dura mater. The bacteria and/or viruses enter the bloodstream around the body (“Neuropathology” 6). Through complex interactions with the endothelial cells, they travel to the ...
As most of you know, smoking is bad for your health, but what some of you might not know is that you don’t actually have to smoke to be harmed by smoking. Lung cancer, which is the leading cause of cancer deaths in men and women, is mainly caused by cigarette smoking. Secondhand smoking causes approximately 2 percent of lung cancer deaths each year. It causes respiratory disease, Sudden Infant Death Syndrome (SIDS), middle ear disease, and asthma attacks in children.
The Centers for Disease Control and Prevention states that meningococcal vaccines are available, but are not capable to prevent all of the different cases (Centers for Disease Control and Prevention). Fortunately, there are many sources available for the treatment of meningitis. In the case of bacterial meningitis, antibiotics are mostly used, and can be prescribed orally. In extreme cases the treatment may be with intravenous antibiotics or even a combination of them. Additionally, corticosteroids mighy be used to suppress the inflammation. The Mayo Clinic states, “The antibiotic or combination of antibiotics depends on the type of bacteria causing the infection…this helps to ensure recovery and reduce the risk of complications, such as brain swelling and seizures” (Steckelberg, James). Another viable route the physician may take is to drain any infected sinus or mastoids, which are the bones in the skull. This technique removes the contaminaded fluid from the brain area preventing the further contamination of the
Most people would think that cigarette smoking can cause many health issues and diseases after looking at the ingredients used, and they are right. Periodontitis, Peptic ulcers, Erectile dysfunction, Chronic obstructive pulmonary disease, Cancer, and cardiovascular disease are just a few of the diseases that can be caused from smoking cigarettes. Smoking may also increase the chance of heart disease, stroke, atherosclerosis, and peripheral vascular disease. Tobacco has also been linked to Buerger 's disease, Oral disease and some infection throughout the body has also been caused by smoking
“Dangers of Smoking Cigarettes for Smokers” healthliteracy.worlded.org. Copyright 1995 by Marjorie Jacobs revised 1997, n.d web 14 April 2011