Immunization is available against certain food- and water-borne infections such as typhoid fever.
Immunization is available against certain food- and water-borne infections such as typhoid fever.
Staphylococcal food poisoning occurs after food such as meat products, cold meats, milk, custard and egg products becomes contaminated before or after cooking, usually through incorrect handling by humans who carry S. aureus. The bacteria produce an ENTEROTOXIN which causes the symptoms of food poisoning 1–8 hours after ingestion. The toxin can withstand heat; thus, subsequent cooking of contaminated food will not prevent illness.
Heat-resistant strains of Cl. perfringens cause food poisoning associated with meat dishes, soups or gravy when dishes cooked in bulk are left unrefrigerated for long periods before consumption. The bacteria are anaerobes (see ANAEROBE) and form spores; the anaerobic conditions in these cooked foods allow the germinated spores to multiply rapidly during cooling, resulting in heavy contamination. Once ingested the bacteria produce enterotoxin in the intestine, causing symptoms within 8–24 hours.
Many di?erent types of Salmonella (about 2,000) cause food poisoning or ENTERITIS, from eight hours to three days after ingestion of food in which they have multiplied. S. brendeny, S. enteritidis, S. heidelberg, S. newport and S. thompson are among those commonly causing enteritis. Salmonella infections are common in domesticated animals such as cows, pigs and poultry whose meat and milk may be infected, although the animals may show no symptoms. Duck eggs may harbour Salmonella (usually S. typhimurium), arising from surface contamination with the bird’s faeces, and foods containing uncooked or lightly cooked hen’s eggs, such as mayonnaise, have been associated with enteritis. The incidence of human S. enteritidis infection has been increasing, by more than 15-fold in England and Wales annually, from around 1,100 a year in the early 1980s to more than 32,000 at the end of the 1990s, but has since fallen to about 10,000. A serious source of infection seems to be poultry meat and hen’s eggs.
Although Salmonella are mostly killed by heating at 60 °C for 15 minutes, contaminated food requires considerably longer cooking and, if frozen, must be completely thawed beforehand, to allow even cooking at a su?cient temperature.
Enteritis caused by Campylobacter jejuni is usually self-limiting, lasting 1–3 days. Since reporting of the disease began in 1977, in England and Wales its incidence has increased from around 1,400 cases initially to nearly 13,000 in 1982 and to over 42,000 in 2004. Outbreaks have been associated with unpasteurised milk: the main source seems to be infected poultry.
ESCHERICHIA COLI O157 was ?rst identi?ed as a cause of food poisoning in the early 1980s, but its incidence has increased sharply since, with more than 1,000 cases annually in the United Kingdom in the late 1990s. The illness can be severe, with bloody diarrhoea and life-threatening renal complications. The reservoir for this pathogen is thought to be cattle, and transmission results from consumption of raw or undercooked meat products and raw dairy products. Cross-infection of cooked meat by raw meat is a common cause of outbreaks of Escherichia coli O157 food poisoning. Water and other foods can be contaminated by manure from cattle, and person-to-person spread can occur, especially in children.
Food poisoning associated with fried or boiled rice is caused by Bacillus cereus, whose heat-resistant spores survive cooking. An enterotoxin is responsible for the symptoms, which occur 2–8 hours after ingestion and resolve after 8–24 hours.
Viruses are emerging as an increasing cause of some outbreaks of food poisoning from shell?sh (cockles, mussels and oysters).
The incidence of food poisoning in the UK rose from under 60,000 cases in 1991 to nearly 79,000 in 2004. Public health measures to control this rise include agricultural aspects of food production, implementing standards of hygiene in abattoirs, and regulating the environment and process of industrial food production, handling, transportation and storage.... food poisoning
For the diagnosis of true food allergy, it is necessary to demonstrate that there is a reproducible intolerance to a speci?c food; also, that there is evidence of an abnormal immunological reaction to it. Occasionally the allergic response may not be to the food itself but to food contaminants such as penicillin, or to food additives such as tartrazine. There may also be reactions to foods which have pharmacological effects, such as ca?eine in strong co?ee or histamine in fermented cheese, or such reactions may be due to the irritant e?ect on the intestinal mucosa (especially if it is already diseased) by, say, highly spiced curries.
Testing blood and skin for food allergy is beloved of some alternative practitioners but, in practice, the results of tests do not necessarily agree with what happens when the food is taken. Therefore, a careful history is as useful as any test in making a diagnosis.... food intolerance
Diagnosis and treatment Any person with isolated, itching, dry and scaling lesions of the skin with no obvious cause – for example, no history of eczema (see DERMATITIS) – should be suspected of having a fungal infection. Such lesions are usually asymmetrical. Skin scrapings or nail clippings should be sent for laboratory analysis. If the lesions have been treated with topical steroids they may appear untypical. Ultraviolet light ?ltered through glass (Wood’s light) will show up microsporum infections, which produce a green-blue ?uorescence.
Fungal infections used to be treated quite e?ectively with benzoic-acid compound ointment; it has now been superseded by new IMIDAZOLES preparations, such as CLOTRIMAZOLE, MICONAZOLE and terbina?ne creams. The POLYENES, NYSTATIN and AMPHOTERICIN B, are e?ective against yeast infections. If the skin is macerated it can be treated with magenta (Castellani’s) paint or dusting powder to dry it out.
Refractory fungal infection can be treated systematically provided that the diagnosis of the infection has been con?rmed. Terbina?ne, imidazoles and GRISEOFULVIN can all be taken by mouth and are e?ective for yeast infections. (Griseofulvin should not be taken in pregnancy or by people with liver failure or porphyria.) (See also FUNGUS; MICROBIOLOGY.)... fungal and yeast infections
– for example, METHICILLIN-RESISTANT STAPHYLOCOCCUS AUREUS (MRSA). This makes hospital-acquired infections potentially dangerous and sometimes life-threatening, and is one of the developments that is prompting calls for greater care in the prescribing of antibiotics as well as higher standards of cleanliness.... hospital-acquired infection
Tinctures. Formula. Echinacea 3; Goldenseal 1; Myrrh quarter. One teaspoon in water every 2 hours (acute) thrice daily (chronic). ... coxsackie infection
Symptoms. Irregular bleeding and moderate pain. Women can still have the infection but no symptoms. Damage to the fallopian tubes possible. Sterility may follow neglect.
Treatment. Formula. Echinacea 2; Goldenseal 1; Myrrh half. Mix. Dose: Powders: 250mg (one 00 capsule or one-sixth teaspoon). Liquid extracts: 15-30 drops. Tinctures: 30-60 drops. Thrice daily in water, honey or fruit juice.
Topical. Douche: 10 drops Liquid extract or Tincture Goldenseal in an ounce (30ml) Rosewater or Distilled extract Witch Hazel. If the condition persists for more than a month, add 10 drops Kava Kava. Diet. Dandelion coffee.
On retiring at night. 2-3 Garlic tablets/capsules.
Treatment by a general medical practitioner or hospital specialist. ... chlamydial infection
Address: Byron House, College Street, Nottingham NG1 5AQ. ... institute of health food retailing
A study carried out at Moorfields Eye Hospital, London, has shown that those who use extended-wear soft contact lenses are more likely to develop microbial keratitis than users of other lenses.
Treatment. Internal: Powders, Tinctures or Liquid Extracts. Combine Echinacea 2; Blue Flag 1; Goldenseal 1. Doses: Powders: 500mg (one-third teaspoon or two 00 capsules). Liquid Extracts 30-60 drops.
Tinctures: 1-2 teaspoons. In water, or honey.
Comfrey. To promote epithelial regeneration. Potential benefit far outweighs possible risk.
Evening Primrose capsules.
Topical. Alternatives. (1) Goldenseal Eye Lotion: 1 part Goldenseal root macerated in 40 parts distilled extract of Witch Hazel 2-3 days. Strain. 5-10 drops in eyebath half filled with warm water; douche. Wipe eyelids. (2) Aloe Vera juice or gel. (3) Moisten Chamomile teabag with warm water and fix over eye for styes, etc. (4) Bathe with Periwinkle minor tea: 2 teaspoons to cup boiling water allowed to cool and strain. (5) Elderflower water. The above to relieve pain, redness and gritty sensation. (6) Evening Primrose lotion. (7) Raw carrot compress to ripen stye. Nasturtium seed compress.
Supplements. Daily. Vitamin A 7500iu, Vitamin B2 10mg, Vitamin C 3g, Vitamin E 400iu, Zinc 15mg. Referral to consultant ophthalmologist. ... eyes – infection
whose immune system is impaired.
In most patients with AIDS, death is due to opportunistic infections, especially pneumocystis pneumonia.
Many fungal infections, such as candidiasis, and some viral infections, such as herpes simplex, are opportunistic infections.
Treatment is with appropriate antimicrobial drugs.... opportunistic infection
The first, CHLAMYDIA TRACHOMATIS, has a number of strains. In men, it is a major cause of nongonococcal urethritis, which may cause a discharge from the penis. In women, the infection is usually symptomless, but it can lead to salpingitis. A baby born to a woman with chlamydial infection may acquire an acute eye condition called neonatal ophthalmia. In parts of Africa and Asia, certain strains of CHLAMYDIA TRACHOMATIS cause trachoma, a serious eye disease.
A second species of chlamydiae, CHLAMYDIA PSITTACI, mainly affects birds but can occasionally spread to people who have contact with pigeons, parrots, parakeets, or poultry, causing a type of pneumonia called psittacosis.
Treatment for chlamydial infections is with antibiotic drugs.... chlamydial infections
Preservatives, such as sodium nitrate, are added to food to control the growth of bacteria, moulds, and yeasts. Other additives, such as antioxidants, improve the keeping quality of food by preventing undesirable changes (they stop rancidity in foods containing fat, for example). Additives that improve texture include emulsifiers, stabilizers, thickeners, and gelling agents. Appearance and taste are improved by the use of colourings, flavourings, sweeteners, and flavour enhancers. Artificial sweeteners, such as saccharin, may be used instead of sugar, especially in products for diabetics or slimmers.
Certain additives may produce an allergic reaction in some people, and some are thought to be a factor in behavioural problems in children.... food additives
Practising safer sex can help prevent STIs.... sexually transmitted infections
Different types of staphylococci are responsible for a variety of disorders, including skin infections such as pustules, boils, and abscesses, and a rash in newborn babies (see necrolysis, toxic epidermal); pneumonia; toxic shock syndrome in menstruating women; urinary tract infection; food poisoning; and, if the bacteria enter the circulation, septic shock, infectious arthritis, osteomyelitis, or bacterial endocarditis.... staphylococcal infections
Fungal infections are therefore more common and serious in people taking long-term antibiotic drugs (which destroy the bacterial competition) and in those whose immune systems are suppressed by immunosuppressant drugs, corticosteroid drugs, or by a disorder such as AIDS. Such serious fungal infections are described as opportunistic infections. Some fungal infections are more common in people with diabetes mellitus.
Fungal infections can be classified into superficial (affecting skin, hair, nails, inside of the mouth, and genital organs); subcutaneous (beneath the skin); and deep (affecting internal organs).
The main superficial infections are tinea (including ringworm and athlete’s foot) and candidiasis (thrush), both of which are common. Subcutaneous infections, which are rare, include sporotrichosis and mycetoma. Deep infections are uncommon but can be serious and include aspergillosis, histoplasmosis, cryptococcosis, and blastomycosis. The fungal spores enter the body by inhalation.
Treatment of fungal infections is with antifungal drugs, either used topically on the infected area or given by mouth for generalized infections.... fungal infections
Infections acquired during birth are almost always the result of microorganisms in the mother’s vaginal secretions or uterine fluid. Premature rupture of the membranes is associated with increased risk of infection, particularly streptococcal. Conditions that can be acquired during delivery include herpes, chlamydial infections, and gonorrhoea.
Treatment of the baby depends on the type of infection. Some birth defects caused by infection (such as certain types of heart defect) can be treated; others (such as congenital deafness) are usually not treatable.... infection, congenital
A particular type, haemolytic streptococci, can cause tonsillitis, strep throat, scarlet fever, otitis media, pneumonia, erysipelas, and wound infections.
Another type is often responsible for urinary tract infection, and another can cause bacterial endocarditis if it enters the bloodstream.... streptococcal infections
In both sexes, causes of urinary tract infections include stones (see calculus, urinary tract), bladder tumours, congenital abnormalities of the urinary tract, or defective bladder emptying as a result of spina bifida or a spinal injury. The risks of developing a urinary tract infection can be reduced by strict personal hygiene, drinking lots of fluids, and regularly emptying the bladder.
Urethritis can lead to the formation of a urethral stricture. Cystitis usually only causes complications if the infection spreads to the kidneys. Pyelonephritis, if it is left untreated, can lead to permanent kidney damage, septicaemia, and septic shock.
The infection is diagnosed by the examination of a urine culture. Further investigations using urography or ultrasound scanning may be necessary. Most infections of the urinary tract are treated with antibiotic drugs.... urinary tract infection
Swimming in polluted water should be avoided because, if swallowed, there is a risk of contracting disease. In addition, a form of leptospirosis is caused by contact with water contaminated by rat’s urine. In tropical countries, there is also a risk of contracting schistosomiasis (bilharzia), which is a serious disease caused by a fluke that can burrow through the swimmer’s skin.... water-borne infection