Why the increases in upper respiratory problems?

Read more about Asthma and Allergies

References:

 

Adv Data 1992 Sep 8;(214):1-19

Office visits for otitis media: United States, 1975-90.

Schappert SM

Division of Health Care Statistics, National Center for Health Statistics.

Data from the National Ambulatory Medical Care Survey show a steady increase in the number and rate of physician office visits for otitis media over the period from 1975 to 1990. The annual visit rate during this period more than doubled, and for children under age 15, increased 175 percent. Though the increase is greatest for males under age 2, there are substantial increases for males and females under age 15. Reasons for this dramatic increase are not readily apparent. Data from the National Health Interview Survey (NHIS), however, suggest that the increased visit rate may reflect an increase in the incidence of ear infections. According to NHIS data, the incidence of acute ear infections among the U.S. population increased by about 40 percent between 1982 and 1990, from 6.1 to 8.6 conditions per 100 persons per year. This compares with an increase of about 52 percent in the physician office visit rate for otitis media, from 1980 to 1990. (Because of gaps in data collection, it is not possible to compare precisely concurrent time periods.) The under 15 age group, which accounts for about 80 percent of otitis media physician office visits, experienced a 60 percent increase in office visit rate from 1980 to 1990. This parallels data from the NHIS that show a 60 percent increase in the incidence of acute ear infections among the under 17 age group from 1982 to 1990. The reporting of an acute ear infection in the NHIS does not necessarily equate to an incidence of otitis media, but the parallel increases in ear infection incidence and otitis media physician visits are mutually supportive and likely to be related.

PMID: 10126841

Mor Mortal Wkly Rep CDC Surveill Summ 1998 Apr 24;47(1):1-27

Surveillance for asthma--United States, 1960-1995.

Mannino DM, Homa DM, Pertowski CA, Ashizawa A, Nixon LL, Johnson CA, Ball LB, Jack E, Kang DS

Division of Environmental Hazards and Health Effects.

PROBLEM/CONDITION: Asthma is one of the most common chronic diseases in the United States, and it has increased in importance during the preceding 20 years. Despite its importance, no comprehensive surveillance system has been established that measures asthma trends at the state or local level. REPORTING PERIOD: This report summarizes and reviews national data for specific end-points: self-reported asthma prevalence (1980-1994), asthma office visits (1975-1995), asthma emergency room visits (1992-1995), asthma hospitalizations (1979-1994), and asthma deaths (1960-1995). DESCRIPTION OF SYSTEM: The National Center for Health Statistics (NCHS) annually conducts the National Health Interview Survey, which asks about self-reported asthma in a subset of the sample. NCHS collects physician office visit data with the National Ambulatory Medical Care Survey, emergency room visit data with the National Hospital Ambulatory Medical Care Survey, and hospitalization data with the National Hospital Discharge Survey. NCHS also collects mortality data annually from each state and produces computerized files from these data. We used these datasets to determine self-reported asthma prevalence, asthma office visits, asthma emergency room visits, asthma hospitalizations, and asthma deaths nationwide and in four geographic regions of the United States (i.e., Northeast, Midwest, South, and West). RESULTS: We found an increase in self-reported asthma prevalence rates and asthma death rates in recent years both nationally and regionally. Asthma hospitalization rates have increased in some regions and decreased in others. At the state level, only death data are available for asthma; death rates varied substantially among states within the same region. INTERPRETATION: Both asthma prevalence rates and asthma death rates are increasing nationally. Available surveillance information are inadequate for fully assessing asthma trends at the state or local level. Implementation of better state and local surveillance can increase understanding of this disease and contribute to more effective treatment and prevention strategies.

PMID: 9580746

 

Br J Gen Pract 1999 Jun;49(443):436-40

Influence of prescription patterns in general practice on anti-microbial resistance in Norway.

Lindbaek M, Berild D, Straand J, Hjortdahl P

Division of General Practice, University of Oslo, Norway.

BACKGROUND: The global pandemic of antibiotic resistance is causing considerable concern, and a major reason for the growing world-wide resistance problem is the overuse of anti-infective drugs, especially the use of broad spectrum antibiotics. This is still a relatively minor problem in most of the Nordic countries where the consumption of antibiotics is less than half of that reported from southern Europe and the United States of America (USA). AIM: To describe the resistance pattern among common respiratory tract pathogens in Norwegian general practice, the national consumption of antibiotics, and GPs' prescription patterns for respiratory tract infections. To offer some suggestions as to why Norway has maintained a favourable situation regarding resistant microbes during the past 10 years. METHODS: An analysis of the prescription patterns in Norwegian general practice. RESULTS: There is a low total prescription volume of antibiotics compared with other countries. Penicillin V is the most commonly used antibiotic for the most common airway diseases in general practice in Norway. CONCLUSION: Although there is a low prevalence of antibiotic resistance in Norway, there is still a great potential for reducing the unnecessary antibiotic prescribing for the most common respiratory illnesses.

Comment in:

• Br J Gen Pract. 1999 Oct;49(447):838-9

 

Eur Respir J 1998 Aug;12(2):432-7

Prevalence of childhood asthma, rhinitis and eczema in Scandinavia and Eastern Europe.

Bjorksten B, Dumitrascu D, Foucard T, Khetsuriani N, Khaitov R, Leja M, Lis G, Pekkanen J, Priftanji A, Riikjarv MA

Dept of Health and Environment, Linkoping University, Sweden.

There is evidence that the prevalence of allergies and asthma differs between populations in western and eastern Europe. This study investigated the prevalence of wheezing, rhinitis and eczema among schoolchildren in urban and rural areas of Scandinavia and the formerly socialist countries of Eastern Europe. A total of 79,000 children from two age groups (13-14 yrs and 6-7 yrs) in 18 study centres responded to a questionnaire within the International Study of Asthma and Allergy in Children (ISAAC). The 12 month period prevalence of symptoms of asthma, allergic rhinoconjunctivitis and atopic eczema was calculated. The prevalence of wheezing among the 13-14 yr old children was 11.2-19.7% in Finland and Sweden, 7.6-8.5% in Estonia, Latvia and Poland and 2.6-5.9% in Albania, Romania, Russia, Georgia and Uzbekistan (except Samarkand). The prevalence of itching eyes and flexural dermatitis varied in a similar manner between the three regions. The regional differences were less pronounced among the 6-7 yr old children in the seven participating centres. The highest prevalence of rhinitis was recorded in April-July in Scandinavia and during the winter months in the other countries. The prevalence of atopy-related disorders was higher in Scandinavia than in Estonia, Latvia and Poland, which in turn had a higher prevalence than five other countries of eastern Europe with a culture less similar to western Europe. This supports the hypothesis that "Western life style" is associated with a high prevalence of childhood allergy.

Publication Types:

• Multicenter study

PMID: 9727797

 

Antimicrob Agents Chemother 1989 Jan;33(1):92-8

Inhibitory activity of cranberry juice on adherence of type 1 and type P fimbriated Escherichia coli to eucaryotic cells.

Zafriri D, Ofek I, Adar R, Pocino M, Sharon N.

Department of Human Microbiology, Sackler Faculty of Medicine, Tel Aviv University, Israel.

Inhibition of bacterial adherence to bladder cells has been assumed to account for the beneficial action ascribed to cranberry juice and cranberry juice cocktail in the prevention of urinary tract infections (A. E. Sobota, J. Urol. 131:1013-1016, 1984). We have examined the effect of the cocktail and juice on the adherence of Escherichia coli expressing surface lectins of defined sugar specificity to yeasts, tissue culture cells, erythrocytes, and mouse peritoneal macrophages. Cranberry juice cocktail inhibited the adherence of urinary isolates expressing type 1 fimbriae (mannose specific) and P fimbriae [specific for alpha-D-Gal(1----4)-beta-D-Gal] but had no effect on a diarrheal isolate expressing a CFA/I adhesin. The cocktail also inhibited yeast agglutination by purified type 1 fimbriae. The inhibitory activity for type 1 fimbriated E. coli was dialyzable and could be ascribed to the fructose present in the cocktail; this sugar was about 1/10 as active as methyl alpha-D-mannoside in inhibiting the adherence of type 1 fimbriated bacteria. The inhibitory activity for the P fimbriated bacteria was nondialyzable and was detected only after preincubation of the bacteria with the cocktail. Cranberry juice, orange juice, and pineapple juice also inhibited adherence of type 1 fimbriated E. coli, most likely because of their fructose content. However, the two latter juices did not inhibit the P fimbriated bacteria. We conclude that cranberry juice contains at least two inhibitors of lectin-mediated adherence of uropathogens to eucaryotic cells. Further studies are required to establish whether these inhibitors play a role in vivo.

 

Pediatrics 2001 Dec;108(6):E97

Asthma hospitalization trends in Charleston, South Carolina, 1956 to 1997: twenty-fold increase among black children during a 30-year period.

Crater DD, Heise S, Perzanowski M, Herbert R, Morse CG, Hulsey TC, Platts-Mills T.

Department of Pediatrics, Children's Hospital, Medical University of South Carolina, Charleston, South Carolina, USA.

OBJECTIVE: The increase in asthma prevalence has been documented worldwide, affecting many races living in many different climates. Multiple studies have demonstrated that the most striking prevalence and morbidity of asthma in the United States has been in black children, but little research has determined the scale of the increase, or specifically when the disease became severe in this group. This study sought to determine exactly when the rise in asthma hospitalizations among black patients began and what the pattern of asthma hospitalizations has been in different races and age groups over a 40-year period in 1 urban area. METHODS: A retrospective chart review of discharges from the Medical University of South Carolina was conducted from 1956 to 1997. Charts with the primary discharge diagnosis of asthma were examined for discharge date, race, and age group (0- to 4-year-olds, 5- to 18-year-olds, 19- to 50-year-olds, > or =51-year-olds). The diagnostic codes used were based on the International Classification of Diseases (ICD)-6, 1956-1957; ICD-7, 1958-1967; ICD-8, 1968-1978; and ICD-9, 1979-1997. Over the period studied, this hospital was the primary inpatient provider for children in this area, and the only provider for uninsured children. Between 1960 and 1990, the racial makeup of the area remained stable, as did the percentage of blacks living at the poverty level. The raw number of asthma discharges, rate per 10 000 discharges of the same race, and rate per 100 000 population in Charleston County were tabulated for each age group and racial category. RESULTS: Over the time period examined, there has been a progressive increase in asthma hospitalizations in black individuals of all age groups and in whites under 18 years. The most striking increase has been in black children 0 to 18 years old (figure). The increase either as raw values or as a rate per 100 000 began around 1970, and was linear. This increase in black children discharged with asthma as a rate per 100 000 population was 20-fold: the rate increased from 18 in 1970 to 370 in 1997. Asthma discharges as a rate per 10 000 black children discharged increased by 24-fold from 1960 to 1997. Total discharges from the hospital increased from 49 000 to 128 000 per year over this period. Blacks made up only 28% of discharges in 1957, but that proportion increased to 56% in 1960 and remained relatively stable over the following 35 years. The increase seen in white children 0 to 18 years of age as a rate per 100 000 population was 5-fold and began around 1980. Both increases seem to be consistent over the time period studied, and continued to 1997. [figure: see text]. CONCLUSIONS: Among a predominantly poor black population living in a southern US city, there has been a steady increase in childhood asthma hospitalizations over the past 30 years. A significant although less dramatic rise has occurred in white children. Over this time period, although there have been many changes in lifestyle that could have contributed to this rise, there have been no major changes in housing conditions for poor patients. In addition, Medicaid coverage for children in South Carolina did not change significantly until 1999. The time course of these increases parallels increases reported in other Western populations, suggesting that there must be 1 or more common factors contributing to the rise. Many explanations have been offered for the changes in incidence and severity of asthma. The scale of the change, time course, and linearity of the increase in this study represent a challenge to many of the hypotheses proposed to explain this epidemic.

American Academy of Asthma, Allergy and Immunology. The Allergy Report. Vol. 1, page 6. [Even while reporting these facts this academy continues to consider histamine a bad guy.]

Nasal mucosal endorgan hyperresponsiveness.

Svensson C, Andersson M, Greiff L, Persson CG

Department of Otorhinolaryngology, Head & Neck Surgery, University Hospital, Lund, Sweden.

Nonspecific hyperresponsiveness of the upper and lower airways is a well-known characteristic of different inflammatory airway diseases but the underlying mechanisms have not yet been satisfactorily explained. In attempts to elucidate the relation of hyperresponsiveness to disease pathophysiology we have particularly examined the possibility that different airway endorgans may alter their function in allergic airway disease. The nose, in contrast to the bronchi, is an accessible part of the airways where in vivo studies of airway mucosal processes can be carried out in humans under controlled conditions. Different endorgans can be defined in the airway mucosa: subepithelial microvessels, epithelium, glands, and sensory nerves. Techniques may be applied further in the nose to determine selectively the responses/function of these endorgans. Topical challenge with methacholine will induce a glandular secretory response, and topical capsaicin activates sensory c-fibers and induces nasal smart. Topical histamine induces extravasation of plasma from the subepithelial microvessels. The plasma exudate first floods the lamina propria and then moves up between epithelial cells into the airway lumen. This occurs without any changes in the ultrastructure or barrier function of the epithelium. We have therefore forwarded the view of mucosal exudation of bulk plasma as a physiological airway tissue response with primarily a defense function. Since the exudation is specific to inflammation, we have also suggested mucosal exudation as a major inflammatory response among airway endorgan functions. Using a "nasal pool" device for concomitant provocation with histamine and lavage of the nasal mucosa we have assessed exudative responses by analyzing the levels of plasma proteins (e.g., albumin alpha 2-macroglobulin) in the returned lavage fluids. A secretory hyperresponsiveness occurs in both experimental and seasonal allergic rhinitis. This type of nasal hyperreactivity may develop already 30 minutes after allergen challenge. It is attenuated by topical steroids and oral antihistamines. We have demonstrated that exudative hyperresponsiveness develops in both seasonal allergic rhinitis and common cold, indicating significant changes of this important microvascular response in these diseases. An attractive hypothesis to explain airway hyperresponsiveness has been increased mucosal absorption permeability due to epithelial damage, possibly secondary to the release of eosinophil products. However, neither nonspecific nor specific endorgan hyperresponsiveness in allergic airways may be explained by epithelial fragility or damage since nasal absorption permeability (measured with 51CR-EDTA and dDAVP) was decreased or unchanged in our studies of allergic and virus-induced rhinitis, respectively. Thus, the absorption barrier of the airway mucosa may become functionally tighter in chronic eosinophilic inflammation.