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PubMed2000

Complications according to mode of delivery among human immunodeficiency virus-infected women with CD4 lymphocyte counts of < or = 500/microL.

OBJECTIVE: We sought to describe rates of and risk factors for complications by delivery mode among human immunodeficiency virus-infected women with CD4 counts of < or = 500/microL. STUDY DESIGN: Complication rates were calculated by delivery mode, as follows: planned cesarean delivery performed without labor or rupture of membranes, other cesarean delivery performed after labor or rupture of membranes, or vaginal delivery. Risk factors were evaluated. RESULTS: Major complications in the planned cesarean delivery (n = 37), other cesarean delivery (n = 95), and vaginal delivery (n = 365) groups were amnionitis or endometritis (16%, 27%, and 7%, respectively), wound infection (5%, 8%, and <1%, respectively), and transfusion (8%, 6%, and 3%, respectively). Any peripartum infection occurred among 16 (18%) of those with a CD4 count of <200/microL and 43 (13%) with a CD4 count of > or =200/microL (P =.17). On multivariate analyses, factors associated with amnionitis-endometritis were cesarean delivery and African American race, and a factor associated with transfusion was third-trimester anemia. CONCLUSION: Endometritis and wound infection occurred more frequently among human immunodeficiency virus-infected women after cesarean than among women undergoing vaginal delivery; however, complication rates overall were within the range reported in human immunodeficiency virus-negative women. Measures to decrease complications in human immunodeficiency virus-infected women, such as greater use of prophylactic antibiotics, should be assessed.

Adult↗
PubMed2004

Prevalence of dermatological disorders in Thai HIV-infected patients correlated with different CD4 lymphocyte count statuses: a note on 120 cases.

BACKGROUND: Skin disease is one health problem among human immunodeficiency virus (HIV)-seropositive patients. Several dermatological findings in HIV-infected patients have been investigated. In this study, the skin lesions of 120 HIV-infected patients with different CD4 count statuses in Bangkok, Thailand, are studied. METHODS: This study was performed as a cross-sectional descriptive study. All subjects had a complete physical examination to detect their dermatological disorders and carried out the necessary diagnostic procedures by consultation with the dermatologist. RESULTS: Eighty percent of all patients were observed to have one or more skin disorders. Xerosis (73.33%) and oral candidiasis (54.17%) were the most common skin disorders, followed by seborrheic dermatitis (46.67%), pruritic papular eruption (36.67%), oral hairy leucoplakia (12.50%), folliculitis (11.67%), herpes zoster (9.17%), and alopecia (6.67%). CONCLUSION: Although the pattern of cutaneous lesions was comparable with previous reports, the strikingly lower prevalence of skin tumor and drug eruption was reviewed. Patients with advanced HIV infection were found to have significantly more skin disorders than those with early stage HIV.

AIDS-Related Opportunistic Infections↗
PubMed1984

[T- and B-lymphocyte counts and their function in patients with primary liver cancer and alveococcosis].

The levels of T- and B-lymphocytes were assayed and their functional activity studied in 23 patients with primary cancer and 21 cases of alveococcosis of liver. The lowered levels of T-lymphocytes in both groups and the decreased C3-fraction of B-lymphocytes in primary cancer of the liver were observed. Considerable changes in serum immunoglobulin system, i. e. an increased level of all immunoglobulins (G, A and M), are reported.

Adult↗
PubMed1999

HIV-1 RNA levels in an African population-based cohort and their relation to CD4 lymphocyte counts and World Health Organization clinical staging.

Apart from a small number of reports from people who are based in hospitals, data on viral load in HIV-infected people in sub-Saharan Africa, where most infections occur, are lacking. We report serum HIV-1 RNA levels in a population-based cohort in rural Uganda using the nucleic acid sequence-based amplification procedure (NASBA) test kit and describe their relation to CD4 counts and World Health Organization (WHO) clinical staging. The median (interquartile range [IQR]) viral loads were 87,000 copies/ml (37,500-295,000 copies/ml) in 40 prevalent cases infected for >6 years, and 31,000 copies/ml (7800-174,000 copies/ml) in 65 incident cases with seroconversion dates within the previous 6 years. Although we found a correlation between viral load and absolute CD4 count (p < .0001), there was no evidence for an association with CD4 decline (p = .1). Overall, there was a significant trend of increasing viral load with worsening clinical stage from a median viral load of 15,000 for those in WHO stage 1 (asymptomatic) to 150,600 copies/ml for those in stage 4 (AIDS; p < .001). However, the association was seen only in incident cases. Thus, we found that the NASBA test on serum was a useful indicator of disease stage especially in persons known to be infected for <6 years. Such baseline data are important for vaccine research, and if antiretroviral drugs become available to more than a few people in Africa, it will be important that accurate viral load estimations are available at least in a proportion of people to monitor the effectiveness of treatment, and measure the compliance and emerging resistance to these drugs.

Adult↗
PubMed1998

Visceral leishmaniosis in HIV-positive patients: primary infection, reactivation and latent infection. Impact of the CD4+ T-lymphocyte counts.

OBJECTIVE: To discriminate cases of visceral leishmaniosis (VL) following a primary infection from cases originating in a reactivation of a latent Leishmania infection and to assess the impact of CD4+ T-cell counts on the occurrence of VL in patients with HIV disease. METHODS: We searched by Western blotting for the presence of Leishmania infantum-specific antibodies in the sera of 236 HIV-positive patients. We performed a follow-up of antileishmanial serology and analysed the evolution of the CD4+ T-cell counts for 14 HIV-positive VL patients and for 18 HIV-positive Leishmania-seropositive patients without VL. RESULTS: This study (1) showed that the VL disease/Leishmania infection ratio in HIV-positive individuals is high (1 : 10); (2) discriminated between a primary Leishmania infection (five patients who converted from Leishmania-seronegative to Leishmania-seropositive) and a reactivation of a latent infection (seven patients); (3) showed that HIV-positive individuals with dramatically low CD4+ T-cell counts maintained or generated a specific antileishmanial antibody production; (4) demonstrated that the primary-VL appeared at significantly higher (P = 0.028) CD4+ T-cell levels than the reactivation-VL; (5) documented the existence of HIV-positive Leishmania-seropositive individuals who despite a severe and prolonged immunosuppression did not develop VL (eight of 18). CONCLUSION: Our data stress the utility of the follow-up by Western blotting for an early diagnosis of VL, and therefore an early treatment, for HIV-positive patients living in endemic areas. They suggest that in a latent Leishmania infection supplementary control mechanism(s) might operate in addition to the T-cell-mediated response, and provide a further example of non-appearance of an opportunistic infection despite a severe reduction in CD4+ T cells.

AIDS-Related Opportunistic Infections↗
PubMed2003

Simian immunodeficiency virus infection of CD4+CD8+ T cells in a macaque with an unusually high peripheral CD4+CD8+ T lymphocyte count.

We assessed the possible role in vivo CD4(+) CD8(+) T cells as a viral reservoir for simian immunodeficiency virus (SIV), in a macaque with 50% CD4(+) CD8(+) T cells in peripheral blood. During primary infection (day 14) of this rhesus macaque with the pathogenic SIVmac251 strain, proviruses were detected at similar frequencies in CD4(+) CD8(+) T cells (1/10) and CD4(+) T cells (1/10) and at a lower frequency in CD8(+) T cells (1/800). On day 235, no viral DNA was detected in CD8(+) cells, despite the persistent high viral load, indicating that CD8(+) cells do not constitute a reservoir during the chronic phase of SIV infection. Infection induced early lymphopenia of CD4(+), CD4(+) CD8(+), and CD8(+) cells; only the CD8(+) cell population returned to initial levels and expanded further. We found that CD4(+) CD8(+) T cells expressed the costimulatory CD28 molecule less and were more prone to die in vitro after phytohemagglutinin/interleukin 2 stimulation than were CD4(+) T cells. Taken together, massive death of CD4(+) CD8(+) T cells during acute stages of SIV infection may explain why CD8(+) T cells did not represent a major reservoir for SIV at the onset of infection.

Animals↗
PubMed1998

Dermatological findings correlated with CD4 lymphocyte counts in a prospective 3 year study of 1161 patients with human immunodeficiency virus disease predominantly acquired through intravenous drug abuse.

Several prospective studies on dermatological findings in human immunodeficiency virus (HIV) type 1 infected patients have been published, mostly in populations in which the predominant risk factor for HIV infection is homosexuality. We attempted to identify cutaneous diseases associated with HIV-1 infection and to assess disease progression in a cohort of Spanish patients in whom the predominant cause of HIV infection was intravenous drug abuse. We prospectively examined 1161 HIV-1-positive patients for 38 months. Seventy-four per cent of patients were intravenous drug abusers, whereas heterosexual contact was the only risk factor in 14% and homosexuality in 9%. Centers for Disease Control stage II disease predominated (51%), whereas stage IV disease was less frequent (39%). The mean CD4 count was 353/mm3. We took patients' past and present medical history and performed a complete physical examination as well as taking photographs and carrying out the necessary diagnostic procedures. CD4 counts/mm3 were measured at each visit. A diagnosis of cutaneous disease was made in 799 patients (69%). Oral candidiasis and seborrhoeic dermatitis were the most common skin disorders, followed by xerosis, drug eruptions, dermatophytosis and the papular eruption of acquired immunodeficiency syndrome. Condyloma acuminatum, herpes zoster and herpes simplex were the most frequent viral infections. Conditions that have a statistically significant association with advanced stage and low CD4 levels include drug eruptions, xerosis, light reactions, diffuse alopecia, herpes simplex, oral candidiasis, psoriasis, oral hairy leucoplakia, molluscum contagiosum, Kaposi's sarcoma, furuncles, candidal intertrigo, folliculitis and ungual infection, as well as onychomycosis and tinea pedis or manuum. Dermatoses commonly associated with homosexuality, such as Kaposi's sarcoma and oral hairy leucoplakia, were rare in our patients.

AIDS-Related Opportunistic Infections↗
PubMed1998

Mathematical modeling of the interrelationship of CD4 lymphocyte count and viral load changes induced by the protease inhibitor indinavir.

While CD4 cell counts are widely used to predict disease progression in human immunodeficiency virus (HIV)-infected patients, they are poorly explanatory of the progression to AIDS or death after the introduction of chemotherapy. Changes in HIV load (as measured by RNA PCR) have been shown to be a much better predictor of the risk of disease progression. Since the interrelationship of these markers is of great clinical interest, we modeled the time-averaged return of CD4 cell count and change in viral load subsequent to therapy with the HIV protease inhibitor indinavir. We found that CD4 cell return was significantly related to both the baseline CD4 count (r2 = 0.86, P < 0.001) and the decline in HIV RNA PCR-determined viral load (also referred to in this work as the HIV RNA PCR decline) (r2 = 0.60, P < 0.01). Simultaneously modeling both influences in a linked nonlinear model (r2 = 0.93, P < 0.001) demonstrated that (i) the starting number of CD4 cells accounted for the majority of the change in CD4 cell return and (ii) the return of CD4 cells attributable to viral load decrease was 50% of maximal with only a decrease of approximately 0.2 log of HIV RNA as modeled from the first 12 weeks of therapy. Much greater viral inhibition beyond that necessary for maximal CD4 cell return is possible. Given that HIV RNA PCR decline is more strongly linked to ultimate clinical course in HIV disease, our findings indicate that CD4 return is potentially misleading as an indicator of antiviral effect, since it is determined more by the starting CD4 value than by viral load decline and since near-maximal changes occur with minimal antiviral effect.

Acquired Immunodeficiency Syndrome↗
PubMed2006

Evaluation of a low-cost method, the Guava EasyCD4 assay, to enumerate CD4-positive lymphocyte counts in HIV-infected patients in the United States and Uganda.

OBJECTIVE: To evaluate the EasyCD4 assay, a less expensive method to enumerate CD4+ lymphocytes, in resource-limited settings. DESIGN: Cross-sectional study conducted in the United States and Uganda. METHODS: We compared CD4+ cell counts obtained on replicate samples from HIV-infected patients by the EasyCD4 assay, a microcapillary flow-based system, and by standard flow cytometry or FACSCount with linear regression and the Bland-Altman method. RESULTS: Two hundred eighteen samples were analyzed (77 in the United States and 141 in Uganda). In the United States, mean +/- SD CD4 was 697 +/- 438 cells/microL by standard flow cytometry and 688 +/- 451 cells/microL by EasyCD4. In Uganda, the mean +/- SD CD4 was 335 +/- 331 cells/microL by FACSCount and 340 +/- 327 cells/microL by EasyCD4. The 2 methods were highly correlated (US cohort, r2 = 0.97, slope = 1.0, intercept = -18; Ugandan cohort, r2 = 0.92; slope = 0.95; intercept = 23). The mean differences in CD4 cell counts were 9.0 and -4.6 cells/microL for the US and Ugandan cohorts, respectively, and they were not significant in either cohort. In the Ugandan cohort, sensitivity and specificity of the EasyCD4 for CD4 below 200 cells/microL were 90% and 98%, respectively. Positive predictive value was 96%; negative predictive value was 93%. CONCLUSIONS: Our results suggest that EasyCD4 may be used with high positive and negative predictive value in resource-limited settings.

CD4 Lymphocyte Count↗
PubMed1981

[Lymphocyte count in the blood of stomach cancer patients].

The content of T- and B-lymphocytes was studied in the blood of 72 patients with gastric ulcer and carcinoma. The amount of complete T- and B-lymphocytes and incomplete B-lymphocytes was found to dramatically decrease in patients with peptic ulcer and gastric carcinoma with distant metastases. The authors believe that the data obtained could be used in addition to others when choosing the specific treatment of patients with gastric carcinoma in the postoperative period.

Adult↗
PubMed1996

CD4+ T lymphocyte counts and patterns of mortality among patients infected with human immunodeficiency virus who were enrolled in community programs for clinical research on AIDS.

CD4+ T lymphocyte measurements are used frequently in clinical practice and have important prognostic implications. In this study, we describe mortality patterns for 5,204 human immunodeficiency virus (HIV)-infected patients classified in different CD4+ cell strata; patients with and patients without a history of disease progression were included. Patients were enrolled in studies sponsored by the Terry Beirn Community Programs for Clinical Research on AIDS of the National Institute of Allergy and Infectious Diseases between September 1990 and December 1993. Over a median follow-up period of 23.6 months, 1,703 of the 5,204 patients died. For those with CD4+ cell counts (/mm3) of < 25, 25-49, 50-99, 100-199, and 200-499, the cumulative mortality rates after 24 months were 72%, 58%, 47%, 27%, and 10%, respectively. The median survival time was 15 months for those with CD4+ cell counts of < 25 cells/mm3; 21 months for those with CD4+ cell counts of 25-49 cells/mm3; and 40 months for patients with CD4+ cell counts of 100-199/mm3. In each CD4+ cell stratum, mortality rates were higher for those with a history of disease progression at entry into the study; across all CD4+ cell strata, mortality was 60% greater (relative risk = 1.6; 95% confidence interval = 1.5-1.8). These data should be useful in planning clinical trials, and they have implications in terms of the frequency with which CD4+ cell counts should be measured to monitor the progression of HIV infection.

Adult↗
PubMed2003

Ethnicity and discordance in plasma HIV-1 RNA viral load and CD4+ lymphocyte count in a cohort of HIV-1-infected individuals.

BACKGROUND: Guidelines for commencing therapy for HIV infection have been based upon HIV-1 RNA and CD4 lymphocyte thresholds. The influence of confounding factors such as gender, ethnicity and co-infections is unproven. OBJECTIVES: To analyse ethnic discordance in plasma HIV-1 viral load (VL) and CD4+ count and its potential clinical significance in Black and Caucasian groups. STUDY DESIGN: Retrospective, cross-sectional, observational study of 537 antiretroviral nai;ve HIV-1-positive individuals attending two East London clinics. Baseline data were obtained from individuals who registered at the clinic from November 1996 to August 1999. An analysis was performed comparing ethnic differences in plasma HIV-1 VL, CD4+ count, CD8+ count, co-infections, CDC disease category, AIDS-defining illnesses and mode of transmission. RESULTS: Plasma HIV-1 VL was significantly lower in Blacks (4.5 copies/ml versus 4.7 copies/ml; P<0.05) despite lower baseline CD4+ counts and similar rates of disease progression to Caucasian groups. This association remained for patients with less advanced disease after stratification for CD4+ count (CD4+ 200-500, VL 4.5 copies/ml versus 4.7 copies/ml, P<0.01; CD4+ >500, VL 3.4 copies/ml versus 4.3 copies/ml, P<0.001) and disease category (non-AIDS, 4.4 copies/ml versus 4.7 copies/ml; P<0.005). On multivariate analysis, the association persisted following adjustment for gender, age, co-infections, CD4+ count and mode of transmission. CONCLUSIONS: These results suggest that plasma HIV-1 VL is discordantly low in Black compared with Caucasian groups stratified for CD4+ count, in this cohort of antiretroviral nai;ve HIV-1-positive individuals living in London. Although there are a number of possible explanations for this finding, it has considerable clinical relevance for the management of Black HIV-1-infected patients within UK, with significant implications for the decision about when to commence antiretroviral or immune-based therapies.

Adult↗
PubMed2000

Survival in children with perinatal HIV infection and very low CD4 lymphocyte counts.

OBJECTIVES: To evaluate clinical conditions associated with mortality in HIV-infected children with CD4+ counts <100 cells/microl. METHODS: The Pediatric Spectrum of HIV Disease Project is a longitudinal medical record review study with eight study sites in the United States, which have been enrolling children since 1989. Survival time from baseline very low CD4 count (<100 cells/microl) to death was estimated using the Kaplan-Meier method. Cox proportional hazards models were used to evaluate the effect of clinical variables on mortality. RESULTS: Of 522 children (>/=1 year of age) with serial CD4+ T-lymphocyte measurements, the median age at the first very low CD4 count was 4.8 years. The estimated median survival following the first very low CD4 count was 36 months. The following factors present at the first very low CD4 count were independently associated with a higher risk of death: younger age, weight-for-age >2 standard deviations below the mean, and previously diagnosed AIDS. The subsequent development of cytomegalovirus (CMV)-associated disease, Mycobacterium avium intracellulare (MAI) infection, wasting syndrome, or esophageal candidiasis was also independently associated with a higher risk of death. CONCLUSION: Survival in HIV-infected children with very low CD4 counts before introduction of highly active antiretroviral therapy was highly variable. Poor nutritional status and the development of CMV disease or MAI infection were associated with the shortest survival times.

Age Factors↗
PubMed1997

Decreased cytotoxic lymphocyte counts in alexithymia.

BACKGROUND: Alexithymia is a psychological trait characterized by a difficulty in verbalizing feelings, which has been associated with a number of illnesses, including bronchial asthma and cancer. METHODS: In order to understand how psychological variables such as alexithymia affect physical health, we compared the lymphocyte subsets of men (n = 97, mean 30.6) rated as high and low alexithymic when measured by the Toronto Alexithymia Scale (TAS). We analyzed our data by considering alexithymia a categorical variable, using TAS scores of 62 and below, and 74 and above, and by considering alexithymia a continuous variable, using the mean TAS score (64.01) separating high from low alexithymia. RESULTS: When alexithymia was considered a categorical variable, highly alexithymic men had significantly lower numbers of the most cytotoxic natural killer (NK) subset, (CD57-CD16+ cells). When alexithymia was considered a continuous variable, in addition to the NK subset, killer effector T cell (CD8+CD11a+ cells) count was also significantly lower. These results were obtained after controlling for possible effects of smoking and alcohol intake. CONCLUSIONS: These results suggest that the negative modulation of cellular immunity, especially the cytotoxic lymphocytes, may be one mechanism which, combined with other factors that have a negative effect on the immune system such as stress, results in the association between alexithymia and ill health. It is suggested that future studies should, in addition to cell counts, attempt to identify the effects of psychological variables on the cytolytic activity of cytotoxic lymphocytes. Furthermore, follow-up studies should monitor the subjects over the years to demonstrate that alexithymia-mediated negative modulation of the immune system results in clinical pathologies.

Adult↗