Financing blood transfusion services in sub-Saharan Africa: a role for user fees?

The provision of a secure and safe blood supply has taken on new importance in sub-Saharan Africa with the onset of the AIDS epidemic. Blood transfusion services capable of providing safe blood are not cheap, however, and there has been some debate on the desirability and sustainability of different financing mechanisms for blood transfusion services. This paper examines patterns of financing blood transfusion in three countries--Côte d'Ivoire, Zimbabwe and Mozambique. It goes on to consider the conceptual options for financing safe blood, and to examine in detail the possible role of user fees for blood transfusion in Africa, developing a simple model of their likely burden to patients based on data from Côte d'Ivoire. The model indicates that, at best, there can only be a limited role for user fees in the financing of safe blood transfusion services, due mainly to the relatively high cost of producing a unit of safe blood. Charging individuals for the blood they receive is likely to be administratively complex and costly, could realistically recover only a fraction of the production costs involved, and is further complicated by the fact that the main recipients of blood transfusion in sub-Saharan Africa are children and pregnant women. If cost-recovery for safe blood is to be attempted, the most viable option appears to be that of charging a collective fee, levied upon all inpatients, not just on those who receive blood. Such a mechanism is not without problems, not least in its failure to offer incentives for more appropriate blood use, and it is still likely to recover only a portion of the costs of producing safe blood. Whether or not cost-recovery is instituted, there will remain an important role for public funding of blood transfusion services, and, by implication, an important role for foreign donor support.

Comparison of clinical features of acute HIV-1 infection in patients infected sexually or through injection drug use. The Investigators of the Québec Primary HIV Infection Study

Acute HIV-1 infection (AHI) may present with a clinical picture that represents a diagnostic challenge. We tested the hypothesis that two different routes of infection, that is, sexual versus parenteral, might be associated with a difference in the clinical features of AHI. A prospective cohort of seroconvertors was established in Montréal in private medical clinics and hospitals from February 1996 to May 1999. The prevalence of the symptomatic presentation was almost overlapping within the two groups of newly infected individuals 69% (42 of 61) for men having sex with men (MSM) and 69% (18 of 26) for injection drug users (IDUs; p =.98). Comparison of all types of symptoms and signs as well as their duration was also similar in both groups. Of particular interest, the site of lymph node enlargement was not different despite the estimated sites of intravenous inoculation. Oral and anal ulcers were more frequently observed in MSM than in IDUs (6 versus 0 and 4 versus 1, respectively). Neither the mean CD4+ count (514.8 and 414.7 cells/mm3; p =.14) nor the mean viral load (4.45 and 4.70 log copies/ml; p =.40) were different between the two groups at the time of the first study visit. Our study results clearly indicate that health care workers can expect similar clinical presentation of AHI in MSM and in IDUs despite the different routes of infection.

High levels of tumor necrosis factor-alpha and interleukin-1beta in bacterial vaginosis may increase susceptibility to human immunodeficiency virus

Bacterial vaginosis (BV) was identified recently as a cofactor that promotes sexual transmission of human immunodeficiency virus (HIV). This study was done to determine if interleukin (IL)-1beta and tumor necrosis factor (TNF)-alpha could be measured consistently in cervical secretions and if high levels of these cytokines were associated with BV. Secretions were obtained from 209 study subjects; most samples had detectable levels of TNF-alpha (84.2%) and IL-1beta (79.8%). BV was detected in 53 (27.0%) of 196 women. High cytokine levels were significantly associated with BV (adjusted odds ratio [AOR], 4.17; 95% confidence interval [CI], 1.69-10.30), oral contraceptive use (AOR, 2.78; 95% CI, 1.04-7.48), and high leukocyte counts on vaginal smear (AOR, 1.18; 95% CI, 1.03-1.36). Since these cytokines could up-regulate local HIV replication through activation of the long terminal repeat promoter region, the association of BV with high levels of IL-1beta or TNF-alpha may partly explain the mechanism by which this risk factor enhances HIV transmission.

Model of HIV-1 disease progression based on virus-induced lymph node homing and homing-induced apoptosis of CD4+ lymphocytes

Several proposed theories have described the progression of HIV infection. Even so, no concrete evidence supports any as comprehensive, including, for example, why the CD4+ T-cell counts fall from 1000/mm3 of blood to roughly 100/mm3 over an average 10-year period, whereas concomitant viral loads are relatively constant, increasing by several orders of magnitude in late-stage disease. Here, we develop and validate a theoretical model that altered lymphocyte circulation patterns between the lymph system and blood due to HIV-induced enhanced lymph-node homing and subsequent apoptosis of resting CD4+ T cells can explain many aspects of HIV-1 disease progression. These results lead to a recalculation of the CD4+ lymphocyte dynamics during highly active antiretroviral therapy, and also suggest new targets for therapy.

Determinants of condom-use behaviour among STD clinic attenders in South Africa

This cross-sectional study analyses determinants of condom-use behaviour among patients attending dedicated STD clinics in South Africa. A structured interviewer-administered survey was conducted among 1473 patients. Patients' beliefs and attitudes towards condom use in general, as well as their personal condom-use behaviour were measured. Their perceptions, regarding the social influence of their partners and friends on their condom use, and of their self-efficacy in using condoms, while infected with an STD were also measured. Condom use, as a dependent variable, was examined and patients were placed in a pre-contemplation stage if they had never used a condom, contemplation if they had seriously thought of using a condom, some action stage if they sometimes used a condom and regular action stage if they used a condom every time. The relationships between the stages of change, as dependent variables, and the independent variables were investigated for both those patients with steady partners and those with outside partners. This was performed by stepwise multiple regression analyses. The variables that significantly explained stages of change were similar for patients with steady partners and those with outside partners. In both partner groups communication was the variable most strongly associated with the use of condoms. General self-efficacy in condom use, self-efficacy in condom use with a partner and attitudes towards the use of condoms played a role in determining patients' different stages of change.

Factors related to delayed diagnosis of HIV infection in southeastern France. EVALVIH group

We aimed to identify risk factors associated with delayed diagnosis of HIV infection in a French region highly affected by AIDS. Data were collected in southeastern France through the HIV-surveillance system based upon anonymous declarations by laboratories and physicians prescribing HIV testing. From January 1996 to December 1997, 825 persons were diagnosed for the first time as HIV infected (female: 32%; >40 years: 28%); 46% had been infected through heterosexual intercourse, 26% through homosexual intercourse, and 19% through intravenous drug use. The semestrial (6 monthly) incidence rate decreased from 122.7 to 69.7 per million inhabitants (P<0.001). County of residence, age, sex, country of birth, and transmission category did not change significantly during the observation period. Twenty-seven per cent had a delayed diagnosis of HIV infection. This proportion did not differ significantly according to sex or country of birth, or during the observation period. However, after controlling for the other factors, delay was more frequent among injecting drug users (IDUs) (35%, P<10(-2)) than other transmission categories; it was also positively associated with age (47% above 50 years vs 13% under 30 years, P<10(-2)). This study highlights that, in spite of the current AIDS prevention policy and wide access to HIV screening, the proportion of delayed diagnosis of HIV infection remains high. Physicians should concern themselves with this public health issue, and campaigns should target people insufficiently aware, especially IDUs and older people. Further research is needed to understand better the causes of delayed diagnoses and of inequalities in access to HIV screening.

Gender differences in HIV-related sexual risk behavior among urban African American youth: a multivariate approach

Alcohol and other drug (AOD) use during sexual encounters, sexual partner's age, perceived HIV risk and perceived condom effectiveness were studied among 388 sexually active African American youth. Cluster analysis of condom use, number of partners, and frequency of sexual intercourse identified four groups: low risk, monogamy strategy, condom strategy, and high risk. Low-risk youth used condoms consistently and had few partners. High-risk youth used condoms inconsistently with many partners. Monogamy strategy youth used condoms inconsistently but had few partners. Condom strategy youth used condoms consistently with a moderate number of partners. The high-risk group included more males and the monogamy group included more females. High-risk males reported more AOD use during sexual activity than all females, and low-risk or condom strategy males. Females had older partners, rated condoms as less effective and perceived lower HIV/AIDS risk than males. Results suggest differential HIV risk mechanisms by gender. Implications for gender-specific HIV prevention are discussed.

Persistently elevated levels of von Willebrand factor antigen in HIV infection. Downregulation during highly active antiretroviral therapy

Levels of circulating von Willebrand factor (vWf) antigen are thought to reflect endothelial involvement in various disorders. In the present study we found markedly elevated plasma levels of vWf in HIV-infected patients demonstrated on both cross-sectional and longitudinal testing. Notably, we found that a persistent rise in vWf antigen was associated with progression of HIV-related disease. This elevation of vWf antigen represented functionally normal vWf as evaluated by plasma FVIII, ristocetin cofactor assay and vWf multimer analyses. While HIV-infected patients showed enhanced platelet activation, platelets did not contribute substantially to the increased vWf levels. The high vWf levels were significantly correlated with high viral load, and during HAART, the pronounced decline in HIV RNA levels was accompanied by a corresponding decrease in vWf. The persistent elevation of functionally normal vWf during HIV infection, most probably reflecting a persistent endothelial cell activation, may have an important role in the pathogenesis of HIV infection.

Employment and contextual impact of safe and unsafe sexual practices for STI and HIV: the situation in China

China's dual employment system plays a crucial role in sexually transmitted infections (STIs) and HIV-related safe and unsafe sexual practices among young Chinese people. Social and psychological determinants of safe and unsafe sexual practices for HIV infection among young people in Sichuan, China were examined. Our findings indicate that changes in China's social structure and employment system impact upon the social contextual involvement and socio-sexual practice of young Chinese people. The findings in the study suggest that the employment-related contextual involvement was a major predictor in the relationships between demography, information, and psychological risk-taking factors on one hand and the people's safe and unsafe sexual practices on the other. Self-employed people (officially called 'getihu') were more likely than the state-employed people to engage in unprotected sex with casual sexual partners. As China undergoes social restructuring and many state-employed people are laid off, the risk may also extend into the broader non-self-employed population as more state-employed people become involved not only in the self-employed getihu's socioeconomic activities but also in their unconventional socio-sexual practices. Collective vulnerability to STI and HIV, due to the current socio-sexual practices of the getihu young people, has created a new frontier for STI and HIV prevention in today's China, as well as demonstrating the importance of collective action with STI and AIDS prevention strategies within relevant social and sub-cultural contexts.

HIV risks in a homeless population

Homeless people are one of the most vulnerable with regard to HIV transmission. However, most research on this population has been carried out on samples from health clinics. We surveyed 390 homeless people in Houston at a day shelter with regard to their HIV/AIDS knowledge and risk behaviours. The sample was 76% African-American, 11% Euro-American, with small numbers of Latin-Americans, Native-Americans and Asian-Americans: half were born in Texas, and 92% were male. Data indicated that HIV/AIDS knowledge was higher in those who were at higher behavioural risk, although the direction of causality in these cross-sectional data cannot be inferred. African-Americans were at slightly higher risk. Compared with previous clinic samples, this sample was older and a higher number (one-third) slept the last night outside. Eighty per cent had had an HIV test. Condom use was low with both males and females most commonly not reporting using condoms although more than half had had sexual contact in the past month. Multivariate analysis indicated that ethnicity and HIV/AIDS knowledge were independent predictors of risk behaviour. Lifetime risks included one-third who had injected drugs (and shared needles), and nearly 10% had had sex with someone they knew to be HIV seropositive. Lack of future time perspective rather than level of knowledge may be a barrier to reducing HIV risks, and the data are discussed in terms of policy implications and homelessness.

National estimates of HIV-related symptom prevalence from the HIV Cost and Services Utilization Study

OBJECTIVES

The objectives of this study were (1) to estimate the prevalence, bothersomeness, and variation of HIV-related symptoms in a nationally representative sample of HIV-infected adults receiving medical care and (2) to evaluate new aggregate measures of symptom frequency and bothersomeness.

METHODS

Beginning in January 1996, 76% of a multistage national probability sample of 4,042 HIV-infected adults receiving medical care were interviewed. Participants endorsed the presence and degree of bothersomeness of 14 HIV-related symptoms during the preceding 6 months. Sex-standardized symptom number and bothersomeness indices were constructed. After sampling weights were incorporated, symptom distributions were compared according to selected characteristics by analysis of variance and multiple linear regression modeling.

RESULTS

Prevalence of specific symptoms in the reference population was as follows: fever/night sweats, 51.1%; diarrhea, 51%; nausea/anorexia, 49.8%; dysesthesias, 48.9%; severe headache, 39.3%; weight loss, 37.1%; vaginal symptoms, 35.6% of women; sinus symptoms, 34.8%; eye trouble, 32.4%; cough/dyspnea, 30.4%; thrush, 27.3%; rash, 24.3%; oral pain, 24.1%; and Kaposi's sarcoma, 4%. Aggregate measures were reliable (Cronbach's alpha > or =0.75) and demonstrated construct validity when compared with other measures of disease severity. After adjustment for CD4 count, both symptom number and bothersomeness varied significantly (P <0.05) by teaching status of care setting, exposure/risk group, educational achievement, sex, annual income, employment, and insurance category. However, the magnitude of variation was small. Symptoms were greatest in women and injection drug users, as well as in persons with lower educational levels, lower income, and Medicare enrollment or those who were followed up at teaching hospitals.

CONCLUSIONS

The prevalence and bothersomeness of HIV-related symptoms are substantial and vary by setting of care and patient characteristics.

Hemophilia treatment. Predicting the long-term risk of HIV exposure by cryoprecipitate

Most of the world's haemophilia population lives in countries with few medical or financial resources. As such, they cannot easily obtain viral-inactivated clotting product. Many patients are treated with cryoprecipitate made from locally supplied blood. The reasoning for using cryoprecipitate, instead of viral-inactivated products, is based on an unspoken belief that because blood banks can provide reasonably safe products by using modern testing procedures, transmission of HIV and other blood-borne viruses is rare. However, the risk of acquiring a blood-borne infection increases with every exposure, and haemophilia patients treated with cryoprecipitate or fresh-frozen plasma are exposed to hundreds or thousands of donors during their lifetime. The risk that a person infected with HIV will donate blood during the 'window period' is directly related to the incidence of HIV in the country where the donation occurs. To demonstrate the extent of this problem, we devised a model for estimating the risk that a person with haemophilia will encounter HIV-contaminated cryoprecipitate based on the years of treatment and the underlying incidence rate of HIV among blood donors. We applied the model to two countries with different incidence rates of HIV: Venezuela and the United States. We found that a person with haemophilia who receives monthly infusions of cryoprecipitate prepared from plasma of 15 donors over a lifetime of treatment (60 years) is at significant risk of being exposed to HIV. In the United States there is a 2% risk of being exposed to HIV-contaminated blood product, and in Venezuela, the percentage of risk is 40%. Given this degree of risk, medical care providers should carefully evaluate the use of cryoprecipitate except in emergencies or when no viral-inactivated products are available.

[Evolution of the prevalence of HIV infection and risk behavior of drug injection among intravenous drug users infected or not infected by HIV in 3 Spanish cities. Working Group of Physicians of the World for the monitoring of HIV infection and risk behaviors in intravenous drug users]

OBJECTIVE

To know the evolution of HIV prevalence and risk behavior practices of drug injection in three spanish cities on the basis of the serologic status of injecting drug users.

METHODS

Cross-sectional surveys among users in syringe interchange programmes.

RESULTS

HIV prevalence (self-reported) decreased in Madrid from 50% (1992) down to 41% (1996) (p = 0.01) and did not change in Seville and Valencia from 1994 to 1996. Among HIV-positive injecting drug users, a decrease was observed in the practice of giving and taking used syringes in the three cities, although this decrease reached a statistically significance (p = 0.006) only for giving in Valencia from 1994 to 1996 and was almost significant (p = 0.08) for taking in Madrid from 1993 to 1996. Among HIV-negative injecting drug users, no decreases were observed in the practice of giving and taking used syringes and even a significant increase in giving syringes in Seville was recorded (p = 0.01) from 1994 to 1996.

CONCLUSIONS

HIV prevalence among injecting drug users is stabilized or decreasing in the three studied cities. The prevalence of injecting risk behavior evolves differently according to the serologic status.

Use of buprenorphine in HIV-infected injection drug users: negligible impact on virologic response to HAART. The Manif-2000 Study Group

Some HIV-infected injecting drug users (IDUs) on drug abuse maintenance treatment have access to highly active antiretroviral therapy (HAART); this raises questions about the effects of individual treatments on the efficacy of HAART. The French Cohort Study of HIV-infected IDUs - MANIF-2000 - allowed one to assess whether buprenorphine differentially impacts efficacy of HAART. Of the 103 HAART-treated patients, (excluding active IDUs and patients on methadone), 20 were on buprenorphine substitution treatment and 83 were ex-IDUs. A linear regression model used the differences in viral load titre before and after treatment initiation, as a dependent variable, and showed that buprenorphine treatment was not significantly associated with viral load trend. This was also the case when adjusting for other potential confounders, and suggests that there is no major short-term influence of buprenorphine on HIV viral load in HAART-treated patients.

Hepatitis C virus co-infection is a negative prognostic factor for clinical evolution in human immunodeficiency virus-positive patients

A longitudinal study of human immunodeficiency virus (HIV)-infected individuals followed-up in 13 centres was performed to assess the influence of hepatitis C virus (HCV) on the clinical and immunological evolution of HIV-infected patients. Eight-hundred and twelve HIV-infected patients with known HIV acquisition date, 89 co-infected with HCV, were included in the cohort. Clinical progression was defined as: 30% decrease of Karnofsky's index; and/or 20% body weight loss; and/or acquired immune deficiency syndrome (AIDS)-defining illness; and/or death (except by accident, suicide, or overdose). Immunological progression was defined as a decrease of initial CD4 count to below 200 mm(-3). If immunological progression was not statistically different between groups (P=0.25), clinical progression was significantly faster in HCV-HIV co-infected patients in univariate (P=0.02) and multivariable survival analysis (hazard ratio=1.63, P=0.03). This argues for active management of hepatitis C chronic infection among HCV-HIV co-infected patients.

HIV health crisis and African Americans: a cultural perspective

While incidence of new HIV infections have decreased in the overall population, the numbers continue to rise in African-Americans creating a serious health emergency. Studies seem to imply that part of the rise is due to HIV beliefs and high risk behaviors among African Americans. Due to certain societal factors, African Americans appear to be at greater risk for contracting the virus. This article will examine these critical social factors and their impact on this current state of emergency in the African American community using Leininger's theory of Culture Care and Universality. Implications for health providers are also addressed.