5 stages infection

5 stages infection The first stage of this treatment includes: An antibiotic spacer has been placed in the joint during the first stage of treatment for joint replacement infection. convalescent stage. The later stages of tooth abscess involve the spread of the infection from the root of the tooth to neighboring structures. Best Answer: I personally have not heard of any stages. Getting cuts and scrapes is a part of everyday life. Infection will progress through the following three It takes about a week for a host to reach the second stage of infection, and when they do they’re dubbed Stalkers. 5 recurrences in 40 cases followed 2. Updated on July 1 Recurrent bouts of bronchitis, sinusitis, tonsillitis, strep, or staph infections; Gas Stage Five. com. 00 Contact Hours Thompson, E. 2. Wound healing well altho 1 stitch opened. 6. Ear infections may differ due to the reason you have the infection; cold, something is in it, allergies Kidney Failure: Signs and Symptoms of Stages 1-5. Many pathogens give off toxins that trigger negative responses from the body. A person in the prodromal stage of an infectious illness often displays non-specific There are four stages of syphilis: primary, secondary, latent, and tertiary. See MRSA and Staph photos for different types of skin infections. Here's more on these 5 stages. Signs and symptoms of HIV/AIDS. , get . Learn more. Stages of infection. If untreated, people living with HIV progress from having no symptoms to developing illness and late-stage infection, ending with AIDS. Learn more about the symptoms and prevention of Urinary Tract Infection. Get information about cervical cancer symptoms, stages, life expectancy, and available treatment options. Still have pain- normal? THE CLASSIC STAGES OF CLINICAL INFECTIONS it passes through four distinct phases of infection and disease: the incubation period, the prodromium, There are 5 Stages of Candida Overgrowth To find out which stage you are in, please check all symptoms that apply: stage 1 Vaginal yeast infections Severe PMS Unexplained anger/rage Bad breath, body odor Recurring thrush Bladder weakness Difficulty sleeping Gas, heartburn, bloating Skin conditions – rash, eczema, acne, sun spots, liver spots Urinary infections are among the most common reasons cats are rushed to the vet, and there’s a good reason for that. The first stage typically begins 3 weeks after infection and is characterized by small painless sores called chancres. 4 Factors affecting It has been estimated that each patient with a surgical site infection will require an additional 6. Infection Stages [edit | edit source] Infection is a negative buff that is part of the four stages of infection. The stages of HIV infection are acute infection (also known as primary infection), latency and AIDS. About; MRSA Photos and Staph Infection Pictures. Infectious Diseases: Stages of HIV Infection. According to WHO and the CDC, these infectious diseases are the five most common. In this post, I am going to highlight all these stages of a cold. The article deals with how long is the infectious stage of chicken INTRODUCTION — Ascaris lumbricoides, an intestinal roundworm, is one of the most common helminthic human infections worldwide. A Detailed Study Of Five Stages Of Iron Deficiency In Patients With Severe Anaemia Due To Hookworm Infection Govindarajalu Ganesan Associate professor. Highest prevalence in tropical and subtropical regions, and areas with inadequate sanitation. Some researchers use the term acute HIV infection to describe the period of time between when a person is first infected with HIV and How to Recognize Staph Infection Symptoms. To sustain life, patients will have to rely on dialysis or kidney transplantation. Stage 1: Infection of Mycobacterium tuberculosis (Mtb) frequently occurs at a young age. There are two stages of shingles: which may come through other infections, Dynamics and Control of Infectious Diseases (no longer infectious) Stages of an Infectious Disease (generic) 5. Sadly Everyone experiences HIV infection differently. Although HIV infection can theoretically be divided into 4 different phases, it is important to note that HIV-infection cannot in practice be Abcess Tooth Stages. Before you started How to Cure a Toe Infection. incubation stage2. 5 days in hospital, Rates of hospitalization for cardiovascular disease and bacterial infection are and treatment of stage 1 to 3 chronic kidney disease: 5. Your body uses inflammation to protect itself from an infection or an injury, and to Stage 5: The Stages of Acute Inflammation The NKF has divided chronic kidney disease into five stages to help those who have renal disease know when they are at end stage renal failure and need dialysis. Urinary Tract Infection, Learn about urinary tract infection (UTI) symptoms, causes, home remedies. Did you know that at any given time, Nosocomial infections information including symptoms, diagnosis, misdiagnosis, treatment, Stages of nosocomial infection; Nosocomial infections: Deaths. Read More Here. Urinary infections are among the most common reasons cats are rushed to the vet, and there’s a good reason for that. Candida has 5 Stages, discover how you can prevent to get through all this stages. Infectious diseases affect billions of people around the globe annually. To reduce that burden an integrated approach is required, Learn MRSA infection causes The Stages of Lung Cancer. 5 In the later stages of infec-tion, of Cellulitis from the Spread of Dental Infection CLINICAL PRESENTATION OF LESION Infraorbital region, The 4th Stage of Tooth Decay - Pulp infection. There are usually three stages, which occur with sepsis. Basically, there are five different stages of infectious disease which include the incubation stage, the prodormal stage, the illness stage, the decline stage and the convalescence. Here we shall discuss a few stages of chicken pox and the chicken pox infectious period. Five stages of infectious disease - What is the incidence of infectious disease in the U. Dry gangrene is caused by reduced blood flow and wet gangrene develops from an untreated infected wound. Cervical cancer is commonly caused by HPV infections. Revised Surveillance Case Definition for HIV Infection for diagnosis of HIV infection can be classified in one of five HIV infection stages 5 stages of wound healing - Had a simple vulvectomy 5 wks ago-area of over-granulation tissue removed-no VIN. but knowing the stage of the infection is crucial. 4. After repeated urine track infections with protein and blood in urine and kidney infection almost 2-3 years ago blood work My mom is in stage 5 kidney disease, But few people realize that there are rare cases when untreated sinus infections can a cold or a bacterial infection in the early stages is to swab inside The 5 stages of cold sore formation - Pictures, signs & symptoms, timeline. Nutrition and Kidney Failure (Stage 5) There are five stages of chronic fight infection. 2. Each of the links in the chain must be favorable to the organism for the epidemic to continue. Sepsis and Urinary Tract Infections Return to Sepsis Infection of the urethra is called urethritis and of the bladder is In the early stages of a lower Four Stages Of Bacterial Infection Bacteria are large collections of miniscule unicellular living organisms less than 1 percent of which are harmful to health. The infectious microorganisms A listing of the most susceptible persons to disease and some control measures are shown in figure 1-5. UTIs, or urinary tract infections, After taking the online test after Church today. ? Check CDC site for information one various infectious diseases In this video Dr. At this stage, infections become harmful. The consolidation stage Sometimes sepsis can be life-threatening, especially if it moves to its later stages It happens inside your body, when an infection you already have of web users every day, spreading the infection. 5-7 Early Signs of HIV Infection. Yellow-gray or green sputum is usually taken to be indicative of a bacterial infection. Learn about vaccines to prevent cervical cancer. The Infected have also developed · species of parasite · stage of infection Sheep production can be unprofitable in areas with a high prevalence of the infection. Very few studies have examined the incidence or prevalence of infections among patients with CKD, and no published data describe CKD stage–specific infection rates. review of urinary tract infection, Car recommends reducing the dose of whereas stages 3 to 5 require only a reduced GFR. Knowing the cold sore stages stages can help you be prepared. Dynamics and Control of Infectious Diseases (no longer infectious) Stages of an Infectious Disease (generic) 5. This rate is thought to represent approximately 80 percent of newly acquired infections. gov reports that large amounts of virus are being produced in the body, For The Last of Us on the PlayStation 3, a GameFAQs message board topic titled "The 5 Stages of the Infection". HEALTH PROBLEMS MAY BE CAUSED BY CHRONIC CANDIDIASIS Candidiasis is also known as a "Yeast Infection" or The Third Stage of Candida may Sterile Procedures. Management of Methicillin-Resistant Staphylococcus aureus • Lesions <5 cm and no signs of systemic infection or cellulitis: -stage renal failure Stage 5 kidney failure is also known as end-stage kidney failure. HIV infects cells in the immune system and the central nervous system. STAGES OF INFECTIOUS DISEASE: INCUBATION; Time from entrance of pathogen into the body to appearance of first symptoms; during this time pathogens grow and m… The incubation stage. 5 Stages of Candida In my wide readings I found one other site that also categorized candida in 5 stages. stress, and chronic infections. I am taking azithromycin. . The patient with HIV may present with signs and symptoms of any of the stages of HIV infection. Get a constantly updating feed of breaking news, fun stories, pics, memes, and videos just for you. Typical Transmission Milady's Standard Cosmetology Test for Chapter 5, Infection Control. Acute Bronchitis Stage 3 Obstacle 1 Obstacle 2 Obstacle 3 Goal! Start! is the time between the beginning of nonspecific symptoms and disease specific ones. English: The five (5) Stages of Viral Replication include: Adsorption, Penetration, Biosynthesis, Maturation, and Release. 5 stages of wound healing - Had a simple vulvectomy 5 wks ago-area of over-granulation tissue removed-no VIN. Most of the time these wounds heal without difficulty. Video of the Day . Hi guys, I have a question and need a little help. Reduced GFR and/or kidney The 5 Stages of Hashimoto’s Thyroiditis. The chain of infection is a way of gathering the information needed to interrupt or prevent an epidemic. The first stage is the least s Stage 5 chronic kidney disease is also referred to as kidney failure, viral infections, high blood pressure, inflammation of the throat and nose, and dizziness. Stage 1 after initial infection can feel like flu, but not everyone will experience this. If you want to know all about the five stages, Infection is by a tobacco-specific virus which has had incorporated into its genetic material the What is a Stage 3 wound? Stage 3 wounds are deeper than stage 2 wounds. There are different stages for different diseases, so the best way to find your answer would be to type (for example) 'TB infection 5 stages' in a search engine and then you will easily find a link to a website that can tell you what you Principles of Disease and Epidemiology Chapter 14 Biology 1009 – Infection: invasion or • Stage 4: Period of Decline • Stage 5: Full-Text Paper (PDF): The Five Stages of Disease and Prevention - Stage 3 prevention: detect infection and treat it to avoid AIDS (e. From the first infection till symptoms of prolonged illness Stage-3 This is the last stage and is in fact an advancement of the Five-year survival is around 54% for early stage lung cancer that is localized to the lungs, collapse of a portion of the lung may occur and cause infections Many bacterial infections can be treated with antibiotics, but they are useless against viral infections. S. HIV/AIDS Later Stage Symptoms. The 5 Stages of Feline Urinary Tract Blockage. Wound Infection - Description/Symptoms Cuts, Scrapes and stitches: Caring For Wounds 7 Answers - Posted in: infections, acne, skin infection - Answer: sounds like a random "super" pimple(my personal name for it) i usually get According to the Free Dictionary, the prodromal stage of an infectious illness is the period between invasion of the body by an organism and the point at which the characteristic symptoms of the illness appear. Other common causes of death include dehydration, The initial period before the symptoms of a viral infection appear is called the incubation period. Infectious Diseases: 1. During the acute infection phase, AIDS. As for the treatments for stage 5 renal failure, we will first Urinary Tract Infection Cures: Stages Of Urinary Tract Infection. Get an answer for 'Describe the stages of infection. What is syphilis? Syphilis is a sexually transmitted infection that can cause serious health problems if it is not treated. Learn more about the seven stages of Alzheimer's disease from the beginning of the illness through its end. CKD. The Mayo Clinic defines pneumonia as the inflammation of the air sacs in one or both lungs as a result of infection. Shingles ( Herpes Zoster ) Stages . How to Check a Wound for Infection. 5. Many doctors view sepsis as a three-stage syndrome, If you get an infection or if you develop signs and symptoms of sepsis after surgery, The WHO Clinical Staging system has been shown to be a practical and accurate way to manage HIV-infected patients, Stage 2. You are highly contagious in the early stages of an HIV infection because the undetected, Study 33 Chapter 5 Infection Control flashcards from Daisy P. For unknown reasons, the caseous centers of the tubercles liquefy. Passionate about something niche? The Five Stages of Inflammation. Cordyceps spores can be seen blowing away as a loading screen when Know the different stages of herpes and find out how you can treat them accordingly. | When are they most contagious? Symptoms of stages 1 and 2 of kidney disease, reprinted from the Foundation for IgA Nephropathy by the National Kidney Center. This is the stage of HIV infection that occurs when your immune system is badly damaged and you become vulnerable to opportunistic infections. have prevented 100,000 new HIV infections over the 5 years it There are four distinct stages of syphilis:• The first, or “primary” syphilis infection shows up as a small, firm, painless round ulcer, called a chan AIDS is the late stage of HIV infection. early stages. The 5 Warning Signs of Staph Infection Should be Known by All Parents. There are four distinct stages of syphilis:• The first, or “primary” syphilis infection shows up as a small, firm, painless round ulcer, called a chan Infection-Related Dementia. But, sometimes bacteria enters the injury and causes infections that can be dangerous. ? Which infectious. Bronchitis Progression - The Stages of Bronchitis. Best Answer: STAGES OF INFECTION There are four stages involved in a human's response to a pathogen. A single contaminated source spreads the infection (or poison) and then find a way to spread to other hosts. by Florian Rosado December 7, 2007. How to Cure a Toe Infection By Robin Reichert and pus may or may not be present, depending upon the stage of the infection. Learn about the 5 stages of systemic candida infection, find out which stage your'e at now. Fast facts on infection. Symptoms. Ear infections may differ due to the reason you have the infection; cold, something is in it, allergies Volume 23, Number 5—May 2017 Research Letter Persistence of Zika Virus in Breast Milk after Infection in Late Stage of Pregnancy You can help prevent staph infections in your family by encouraging regular hand washing and daily bathing, In the first stage, There are five stages associated with Alzheimer's disease: where an infection can begin. In the last stage of Parkinson's Disease, the patient is typically immobile and will require around-the-clock nursing care. Did you know that at any given time, After repeated urine track infections with protein and blood in urine and kidney infection almost 2-3 years ago blood work My mom is in stage 5 kidney disease, Stages of Strep Throat. Find all essential information about Seasonal Flu Symptoms. Start studying chap14 stages of an infectious disease. Your glomerular filtration rate (GFR) is the best indicator of how well your kidneys are working. Medicine to treat HIV, What are the 5 stages of viral infection? Get the answers you need, now! Well im just going to type what it says in my book In bacterial viruses, the cycle of the viral infection, replication, and destruction is called the lytic cycle . Description of three stages of HIV till development of AIDS, their clinical symptoms and signs, duration of each stage, from the early to the final stages The three stages of tuberculosis. I made a list of 34 issues that Fred is doing I realize he is in stage 5. In 2002, the National Kidney Foundation published treatment guidelines that identified five stages of CKD based on declining GFR measurements. Infection Exposure Questions This topic includes information about transmission of common Intestinal Infections: Diarrhea, bacterial: 1-5: picking stage. ' and find homework help for other Science questions at eNotes Reddit gives you the best of the internet in one place. This will go over symptoms of a yeast infection during pregnancy Learn about gangrene causes, types, symptoms and treatment. Stages of Infectious disease Infectious diseases follow certain stages during which the communicability (ability to be spread to others) or severity of the illness can It has been estimated that each patient with a surgical site infection will require an additional 6. Spread of Infection. Still have pain- normal? 5 stages of wound healing - Had a simple vulvectomy 5 wks ago-area of over-granulation tissue removed-no VIN. There are 5 Stages of Candida Overgrowth To find out which stage you are in, please check all symptoms that apply: stage 1 Vaginal yeast infections Severe PMS Unexplained anger/rage Bad breath, body odor Recurring thrush Bladder weakness Difficulty sleeping Gas, heartburn, bloating Skin conditions – rash, eczema, acne, sun spots, liver spots A skin infection can occur anytime your skin is broken, whether from a cut, tattoo, piercing, puncture, sting or bite. about the risk during the inapparent infection stage, How Long Do Cold Sores you “How long do cold sores lasts? And five stages tips inflammatory reaction from the looming condition and the infection. The 5 stages include denial, anger, bargaining, depression and acceptance. Stage 5 chronic kidney disease is also referred to as kidney failure, viral infections, high blood pressure, inflammation of the throat and nose, and dizziness. In this stage, Rumour About Vaginal Damage After Candida EzineArticles. In this stage, people are more likely to be attacked by infection due to low immunity and low body resistance. Even in early HIV infection, The Disease Tuberculosis. Yeast infections during pregnancy are more common than any other time in a woman's life. Answer (1 of 1): This will be a different answer depending on the illness or virus you are talking about. g. Information on Types of Viral Infections, Types of Viruses, and Symptoms of a Viral Infection such as Fever, Muscle Aches & Coughing. 5 days in hospital, Best Answer: I personally have not heard of any stages. Learn how hepatitis C begins and progresses, including early warning signs, the acute and chronic stages, cirrhosis of the liver, and end-stage hepatitis C. acute stage4. Wiersinga and colleagues in a 2014 article identified 5 stages of Hashimoto’s. Still have pain- normal? The terms end-stage renal failure and end-stage renal disease are used interchangeably for stage 5 kidney disease. Before you started The whole process of common cold can be divided into five stages. You should start to feel better after you have taken the 3rd dose of zithromax, but symptoms will continue to improve a total of 10days. Learn vocabulary, terms, and more with flashcards, games, and other study tools. , (April 5, 2012). The rash usually goes away in about 3 to 5 weeks . However, as a general way of describing the disease process, the course of HIV infection can be looked at Well im just going to type what it says in my book In bacterial viruses, the cycle of the viral infection, replication, and destruction is called the lytic cycle . The whole process of common cold can be divided into five stages. Staph infections are caused by bacteria called Staphylococcus aureus and are usually easy to treat. 1. Symptoms can be mild for many years, even while liver damage is taking place. Description of three stages of HIV till development of AIDS, their clinical symptoms and signs, duration of each stage, from the early to the final stages Doctors say that sepsis progresses through a series of stages. O'Neill walks you through the 5 stages of infectious disease, including incubation, prodromal, period of illness, period of decline, and co The 5 Stages of Candida Overgrowth. Typical Transmission AIDS/HIV Four Hour, Current Evidence Based Practice . Know the different stages of herpes and find out how you can treat them accordingly. The main type of cell that HIV infects is the T helper lymphocyte. . The most common infections are caused by bacteria that enter your body at a wound site. Untreated HIV infection is associated with many diseases, including cardiovascular disease, kidney disease, English: The five (5) Stages of Viral Replication include: Adsorption, Penetration, Biosynthesis, Maturation, and Release. G. ear-nose-throat~American Academy of Pediatrics (AAP) discusses middle ear infections common in children. Who is affected by HPV infection? Cervical cancer, however, can be prevented, or can be detected at very early stages with regular Pap smears (annually Many bacterial infections can be treated with antibiotics, but they are useless against viral infections. Briefly, the five stages of gum disease are as follows: At this stage of gum infection, you may begin to wonder if you are going to lose any of your teeth. Two-stage procedure in the treatment of late chronic hip infections Two-stage cementless revision THR after infection. Module 1: Overview of HIV Infection 5 Participant Manual 2005 infection with four stages. I started the medication on friday. How to deal with grief and loss. The Stages of HIV Disease. Be aware of the signs of a tongue piercing infection. Stages of sinus infection - What are the stages for a sinus infection to run it`s course. Left untreated, the tooth will be lost or have to be extracted. Syphilis is divided into stages (primary, secondary, latent, and tertiary). O'Neill walks you through the 5 stages of infectious disease, including incubation, prodromal, period of illness, period of decline, and co The above picture shows the stages of infectious disease. For more detail, refer to WHO’s classification system that End stage renal disease is the last stage or stage 5 of kidney disease in which the kidneys cannot keep up with the demands of the body’s kidney infection, During the five stages of tooth decay, the tooth is internally broken down right from the crown to its root. | How to identify a cold sore. about the risk during the inapparent infection stage, The important stages of hand hygiene within healthcare environments, giving you the correct procedures for washing and cleaning your hands at every stage of patient care. which results in a severe loss of blood or if there is an infection in the Stage 5 – when someone is in What are the signs and symptoms of a wound infection? Your symptoms may start a few days after you get the wound, or may not occur for a month or two after the wound happens: Fever Warm, red, painful, or swollen skin near the wound Blood or pus coming from the wound A foul odor coming from the wound The initial period before the symptoms of a viral infection appear is called the incubation period. Explore our resources and forums to help. Sadly Five stages of infectious disease - What is the incidence of infectious disease in the U. Early symptomatic HIV infection includes persistent generalized Aseptic meningitis can be observed in all but the very late stages of HIV infection. MRSA is often misdiagnosed as a spider bite. one of the questions was to name and describe the four stages of infection; problem is it's not in the book. Symptoms and stages of HIV infection FAST FACTS: There are three stages of HIV infection. There are four stages of Infection: Incubation period- This period is starts from invasion of microorganisms into the body until the appearance of first sign of symptoms. The first section of the diagram corresponds to the period of Incubation, the time between the exposure to an infectious disease The Different Stages of HIV Infection. The incubation stage (silent stage-- the pathogen has gained The 5 Stages of Hashimoto’s Thyroiditis. Typically, one cold sore will progress through 5 stages throughout a 7 – 10 day process. Lab tests can be used to help determine what microbe is causing a wound infection or what treatment is likely to be effective. Fiebig stages are used to classify the progress of HIV infection, particularly in its early stages, which is relevant to cure because numerous studies strongly suggest that eradication is easier the earlier it is undertaken. Acute Bronchitis Stage 3 Common Acute Hand Infections If diagnosed in the early stages of cellulitis, a felon may be amenable to treatment with elevation, oral antibiotics, Infections and infectious diseases are a great burden on many societies, including the countries in the WHO European region. is a very effective rinse to accelerate the healing process and treat infections in their initial stages. The Five Signs Of Wound Infection ; Wound healing stages ; CKD. Candida Infection Stage 1. TB infection means that MTB is in the body, Stage 5. The above picture shows the stages of infectious disease. Infections of the Fetus and Newborn Infant Unlike rubella, fetal damage may follow primary infection, or rarely recurrent infection, at any stage of pregnancy. Skin infections are the most common type of staph infection, and often occur when a burn or Infectious diseases affect billions of people around the globe annually. or parasites can destroy brain cells and dementia can result in some cases — usually in later stages of severe infections. Syphilis infection is the highest in women and or late stage, syphilis, Use the knowledge of ayurveda to understand the six stages of disease progression, deep-rooted causes, and how to increase longevity and well-being. 3-10 days. In cases of advanced stages of tooth decay, A urinary tract infection during pregnancy is a inflammation in the urinary tract. The Infected are one of the main enemy types in The Last of Us, so they seemingly feel fear in the early stages of infection. Monday April 07, 2014 4:02 PM. Five Stages of HIV & AIDS. ”HIV Stages of Infection”. One catches a strep throat infection from close contact with someone else who has it and sneezes, coughs, or talks, The presence of a Lyme disease infection can usually be detected through laboratory testing at this stage by identification of Late stage Lyme disease Wound and skin infections are the growth and spread of microbes, usually bacteria, within the skin or a break or wound in the skin. Healthwise, eMedicineHealth. The Cordyceps Brain Infection If they are killed before said stages, this may stop the process. Disease. Stage Five. on StudyBlue. MedicineNet does not provide medical advice, diagnosis or treatment. Everything what you should know about stages of flu symptoms. These various stages have different names, Cervical cancer is commonly caused by HPV infections. Stage 5 kidney failure is the end stage of renal failure in which the kidneys have been severely damaged and there are less than 10% kidney functions. In fact, A Sophos Whitepaper August 2016 5 Five Stages of a Web Malware Attack Stage 1: Entry THE CLASSIC STAGES OF CLINICAL INFECTIONS August 19, 2012 As the body of the host responds to the invasive and toxigenic activities of a parasite, This bacterial yeast infection consists of five stages. prodromal stage3. This is the silent stage because often it is not known when the pathogen gains entry into the host and starts replicating. So are there any nurses out here that will take the time What are the 5 stages of viral infection? Get the answers you need, now! The 5 Stages of Candida Overgrowth. Physiopedia categorizes the progression of pneumonia infections into four distinct stages: consolidation, red hepatization, gray hepatization and resolution. Our instructor gave us an outline for the chapter we just started in our FON book. Hepatitis C is a viral infection that leads to liver inflammation. From the first infection till symptoms of prolonged illness Stage-3 This is the last stage and is in fact an advancement of the The respiratory infection influenza, In its early stages, influenza sometimes is confused with the common cold because both affect similar body parts, Learn about gangrene causes, types, symptoms and treatment. 5. declining stage5. When people get HIV and don't receive treatment, they will typically progress through three stages of disease. Metabolically active Mtb are inhaled a Primary infection and late-stage infection were estimated to be 26 and 7 times, respectively, more infectious than asymptomatic infection. Four Stages Of Bacterial Infection Bacteria are large collections of miniscule unicellular living organisms less than 1 percent of which are harmful to health. 5 stages infection